Fly Exterminator Cost (2026 Pricing)

Last updated: March 29, 2026

By James — Founder of Pest Control Pricing

A fly exterminator costs $100 to $350 for a one-time residential treatment, with the average homeowner paying around $200. The price depends on the fly species involved, the size of the treatment area, and whether the technician needs to locate a hidden breeding source. Fly control is fundamentally different from most pest control services because killing the adult flies is only a temporary fix. The real solution is identifying and eliminating where the flies are breeding, which is what you are paying a professional to figure out.

This guide covers fly extermination costs by species, treatment method, and service type. Most fly problems in homes can be resolved without professional help once the breeding source is identified, but certain species and situations require a trained technician. For broader pest treatment pricing, see our pest control cost guide. If you are unsure what type of pest you are dealing with, try our pest identifier tool.

How Much Does Fly Treatment Cost by Species?

The species of fly in your home is the single most important factor in determining treatment cost. Different fly species breed in completely different materials, and identifying the species tells the technician exactly where to look for the source. A pest control professional will identify the fly species during the initial inspection and tailor the treatment plan accordingly.

House flies ($100 to $250)

House flies (Musca domestica) are the most common fly species found in homes. They are gray, about 1/4 inch long, and have four dark longitudinal stripes on the top of the thorax. House flies breed in garbage, animal waste, decaying vegetation, and any decomposing organic matter. They are attracted to food odors and land on food surfaces, making them a health concern because they carry bacteria on their legs and mouthparts.

Professional treatment for house flies costs $100 to $250 for a residential visit. The technician will inspect for breeding sources, apply residual insecticide to exterior resting surfaces (walls, eaves, door frames), and may install exterior fly bait stations. However, the real fix is almost always sanitation: securing garbage lids, cleaning up pet waste, removing compost bins from near the house, and repairing window screens. For commercial settings like restaurants and grocery stores, house fly control costs significantly more due to the scope and ongoing monitoring required.

Drain flies ($100 to $200)

Drain flies (Psychodidae family), also called moth flies or sewer gnats, are small (about 1/8 inch), fuzzy, and moth-like in appearance. They hold their wings roof-like over their bodies and are weak fliers, often seen resting on walls near sinks, showers, and floor drains. Drain flies breed in the gelatinous biofilm that builds up inside drain pipes, particularly in drains that are used infrequently.

Professional treatment costs $100 to $200 but is rarely necessary. Drain flies are the most DIY-solvable fly species. Cleaning the affected drain with a stiff pipe brush to physically remove the biofilm, followed by a bacterial drain gel (available at hardware stores for $8 to $15), eliminates the breeding source. If drain flies persist after cleaning all drains, the breeding source may be under a slab, in a floor drain trap that has dried out, or in a sewage leak, which does require professional investigation. For more detail, see our guide on how to get rid of drain flies.

Cluster flies ($150 to $350)

Cluster flies (Pollenia rudis) are slightly larger than house flies, darker in color, and have golden hairs on the thorax. Unlike other fly species, cluster flies do not breed indoors and are not a sanitation issue. They are parasites of earthworms and breed outdoors in soil. In the fall, as temperatures drop, cluster flies seek shelter inside wall voids, attics, and upper floors of homes, sometimes in groups of hundreds or thousands. They emerge on warm winter and early spring days, buzzing against windows.

Professional treatment for cluster flies costs $150 to $350. Treatment typically involves applying residual insecticide to the sunny exterior walls of the home in late August or September, before the flies move indoors. Once they are inside wall voids, treatment is more difficult, and the technician may use a vacuum, interior sprays, and light traps to manage the population. Sealing entry points around the roofline, soffits, and window frames is the most effective long-term prevention strategy. Cluster flies are primarily a problem in rural and suburban areas with large lawns.

Fruit flies ($100 to $200)

Fruit flies (Drosophila melanogaster) are tiny (about 1/8 inch), tan or light brown, and have distinctive red eyes. They hover around ripe or overripe fruit, open beverage containers, and sink drains. Fruit flies breed in any fermenting organic material: rotting fruit, spilled juice, wine residue, and the organic buildup inside drains. A single piece of overripe banana can produce dozens of fruit flies within a week.

Professional fruit fly treatment costs $100 to $200 but is almost never necessary for residential settings. Removing overripe fruit, cleaning drains, wiping down counters, and setting simple apple cider vinegar traps (a small bowl of ACV with a drop of dish soap) will resolve the problem within one to two weeks. Professional treatment is only warranted if fruit flies persist after thorough sanitation, which may indicate a breeding source behind an appliance or under a floor. For detailed DIY solutions, see our guide on how to get rid of fruit flies.

Blow flies and bottle flies ($150 to $400)

Blow flies (Calliphoridae family) are metallic blue, green, or bronze in color and are slightly larger than house flies. Bottle flies are a subset of blow flies. These flies breed exclusively in decaying animal protein: dead animals, rotting meat, and animal waste. If you suddenly have blow flies or bottle flies inside your home and there is no obvious exterior source, the most common cause is a dead mouse, rat, bird, or squirrel inside a wall void, crawl space, or attic.

Professional treatment costs $150 to $400 and is usually necessary because the technician needs to locate and remove the dead animal. This can involve cutting into drywall, accessing crawl spaces, or inspecting the attic. The fly problem resolves completely once the carcass is removed and the area is cleaned and deodorized. If the dead animal is inaccessible, the technician may seal the area and apply residual insecticide to kill emerging flies until the carcass desiccates naturally (usually 2 to 4 weeks). The cost is higher when drywall removal or crawl space access is required.

Flesh flies ($150 to $400)

Flesh flies (Sarcophagidae family) are gray with three dark stripes on the thorax and a distinctive checkerboard pattern on the abdomen. They are similar to blow flies in behavior, breeding in dead animals, animal feces, and decaying organic matter. The treatment approach and cost range ($150 to $400) are identical to blow flies. If you see large gray flies with a checkerboard pattern appearing suddenly inside your home, the likely cause is the same as blow flies: a dead animal in a wall void or hidden area.

Phorid flies ($150 to $300, potentially much more)

Phorid flies (Phoridae family), also called humpbacked flies or scuttle flies, are tiny (about 1/16 to 1/8 inch) and run rapidly across surfaces rather than flying long distances. They are tan to dark brown and have a distinctively arched (humped) thorax. Phorid flies breed in decaying organic matter, sewage, and moisture-saturated soil.

Phorid flies are the most concerning fly species for homeowners because they can indicate a broken sewer line under the slab foundation. When a sewer pipe cracks or separates beneath a concrete slab, sewage leaks into the surrounding soil and provides an ideal breeding site for phorid flies. Treatment for the flies themselves costs $150 to $300, but if the underlying cause is a broken sewer line, the plumbing repair can cost $1,500 to $5,000 or more depending on the extent of the damage and whether the slab needs to be opened. A pest control technician who identifies phorid flies in a slab-on-grade home will typically recommend a plumbing inspection with a sewer camera.

Not all phorid fly infestations indicate a sewer break. They can also breed in floor drain traps that have dried out, mop water left standing, or decomposing organic matter in planters or crawl spaces. However, a sewer line issue should always be ruled out, especially in older homes.

Fungus gnats (not a pest control issue)

Fungus gnats are tiny, dark, mosquito-like flies that hover around houseplants. They breed in the moist organic soil of overwatered potted plants. Fungus gnats are not a pest control issue. Allowing the soil to dry out between waterings eliminates them. Yellow sticky traps placed in pots catch the adults. No professional treatment is needed, and calling an exterminator for fungus gnats is an unnecessary expense. For more information, see our guide on how to get rid of gnats.

What Does Professional Fly Treatment Include?

Professional fly treatment is more diagnostic than most pest control services. The technician's primary job is to identify the fly species and locate the breeding source. Killing adult flies with sprays is straightforward, but it accomplishes nothing if the source keeps producing new flies. A thorough professional fly service includes several steps.

Species identification

The technician identifies the fly species during the initial inspection. Different species point to different breeding sources, so correct identification is essential. House flies mean garbage or organic waste. Drain flies mean pipe biofilm. Blow flies mean a dead animal. Phorid flies may mean a sewer issue. Misidentification leads to treating the wrong area and wasting time and money.

Breeding source inspection

Once the species is identified, the technician inspects likely breeding sites. For house flies, this means checking garbage storage, compost, pet areas, and exterior conditions. For blow flies, this means inspecting wall voids, attics, crawl spaces, and looking for odors that indicate a dead animal. For drain flies, this means checking all drain traps and moisture sources. This inspection phase is where the real value of professional service lies.

Source elimination

The technician addresses the breeding source directly. This may involve removing a dead animal from a wall void, recommending drain cleaning, identifying a sanitation issue, or flagging a potential plumbing problem for further investigation. Without eliminating the source, any chemical treatment is temporary at best.

Residual spray treatment

The technician applies a residual insecticide to surfaces where adult flies rest: exterior walls, door and window frames, eaves, porch ceilings, and garage interiors. Residual sprays kill flies that land on treated surfaces for 30 to 90 days, depending on the product and weather exposure. Interior applications target window sills, light fixtures, and other resting surfaces. This reduces the adult fly population while the source elimination takes full effect.

Light traps (commercial settings)

For commercial fly control in restaurants, food service facilities, and retail stores, the technician installs insect light traps (ILTs) that use ultraviolet light to attract flies onto a glue board. These traps are mounted strategically near entry points, prep areas, and dining rooms. Commercial ILTs cost $50 to $200 per unit and need glue board replacement every 30 to 60 days. Light traps are not typically used in residential settings because they are unnecessary once the breeding source is eliminated.

Follow-up visit

Many pest control companies include a follow-up visit 7 to 14 days after the initial treatment to verify the fly population has declined and the breeding source has been fully addressed. If flies persist, the technician re-inspects for additional breeding sources that may have been missed. Follow-up is especially important for blow fly and phorid fly cases where the source can be difficult to locate on the first visit.

When Do You Need a Professional vs. DIY?

Most residential fly problems are sanitation issues, not pest control issues. If you remove the breeding source, the flies go away on their own within a week or two. Professional treatment is warranted only when the source is hidden, inaccessible, or structural.

When DIY is sufficient

• Fruit flies around the kitchen: Remove overripe fruit, clean drains, set ACV traps. Resolves in 1 to 2 weeks.
• Drain flies near a specific sink or shower: Brush the drain and apply bacterial drain gel. Resolves in 1 to 2 weeks.
• House flies entering from outside: Repair screens, secure garbage lids, clean up pet waste. Fly paper or strips catch stragglers.
• Fungus gnats around houseplants: Let soil dry between waterings. Use yellow sticky traps.

When to call a professional

• You cannot find the breeding source: If flies persist after cleaning and sanitation, a trained technician can identify hidden sources you may have missed.
• Dead animal suspected: Blow flies or flesh flies appearing suddenly inside a clean home almost always mean a dead animal in a wall void, attic, or crawl space. Locating and removing it requires professional equipment and experience.
• Phorid flies in a slab home: These may indicate a broken sewer line under the foundation. A pest control technician can confirm the species and recommend a plumber for sewer camera inspection.
• Cluster flies in fall or winter: Hundreds of slow-moving flies appearing on upper floors and in attics during cold weather are cluster flies that entered through the building envelope. Professional exclusion and treatment is the most effective approach.
• Commercial food service: Restaurants, grocery stores, and food processing facilities are required to have documented pest control programs. DIY is not an option for food service establishments.

For a broader comparison of when professional treatment makes sense for different pests, see our DIY vs. professional pest control guide. If you are unsure whether your situation warrants a professional, see our guide on when to call an exterminator.

What DIY Fly Control Actually Works?

The most effective DIY fly control method is not a product. It is eliminating the breeding source. Once the source is gone, existing adult flies die within their natural lifespan of 15 to 30 days, and no new flies emerge. Here are the DIY approaches that actually produce results.

Eliminate the breeding source (solves 90% of fly problems)

Every fly species breeds in a specific material. Identify the fly, find the source, and remove it. Garbage flies stop when garbage is secured. Drain flies stop when drains are cleaned. Fruit flies stop when rotting fruit is removed. This single step resolves the vast majority of residential fly problems without any products or treatments.

Fly paper and fly strips ($3 to $5)

Old-fashioned fly paper is inexpensive, non-toxic, and effective at catching adult house flies. Hang strips near windows, doors, and garbage areas. They will not solve the problem on their own, but they reduce the visible fly population while sanitation measures take effect. Window fly traps that stick to glass are a less visible alternative.

Apple cider vinegar traps for fruit flies (under $1)

Fill a small bowl or jar with apple cider vinegar and add one drop of dish soap. The vinegar attracts fruit flies, and the soap breaks the surface tension so they sink and drown. Place traps near the sink, fruit bowl, and garbage. This is remarkably effective for fruit flies but does not work for other fly species.

Drain brush and bacterial gel for drain flies ($10 to $20)

For drain flies, use a long-handled pipe brush to scrub the inside of the affected drain and remove the biofilm where drain fly larvae live. Follow up with a bacterial drain gel (brands like InVade Bio Drain or Drain Gel, available at hardware stores) that contains beneficial bacteria to digest remaining organic buildup. Repeat daily for 5 to 7 days. This is more effective than bleach or boiling water because it physically removes the breeding material rather than just flushing the surface.

Exclusion and screens ($5 to $50)

Repairing or replacing damaged window and door screens prevents house flies and other flying insects from entering the home. Standard fiberglass window screen is inexpensive, and replacement screen kits cost $5 to $20 per window. Door sweeps ($5 to $15) seal the gap under exterior doors. Mesh covers over floor drains prevent drain flies from emerging into the living space. These physical barriers provide ongoing protection without chemicals.

Sanitation best practices

• Use garbage cans with tight-fitting lids, both indoors and outdoors
• Take trash out daily during warm months
• Clean garbage cans with soap and water periodically to remove residue
• Pick up pet waste from the yard daily
• Move compost bins at least 20 feet from the house
• Clean under and behind kitchen appliances where food debris accumulates
• Store produce in the refrigerator during fruit fly season
• Rinse recyclables, especially bottles and cans, before placing in bins

What Does NOT Work for Flies?

Some fly control methods are widely used but either ineffective or counterproductive. Understanding what does not work saves money and avoids making the problem worse.

Aerosol bug spray alone

Spraying flying insect killer from a can kills individual flies on contact, but it does nothing to address the breeding source. Within hours or days, new flies emerge and the population returns to the same level. Using aerosol spray as your primary fly control method is like bailing water from a sinking boat without patching the hole. It also introduces unnecessary pesticide into the home environment, particularly concerning in kitchens and food preparation areas.

Indoor bug zappers

Electric bug zappers are popular but problematic for indoor fly control. Research has shown that when a bug zapper electrocutes a fly, it disperses bacteria and insect fragments into the surrounding air in a radius of several feet. In a kitchen or food preparation area, this is a food safety hazard. Additionally, bug zappers attract and kill far more beneficial insects (moths, beetles, lacewings) than the target fly species. UV light traps with glue boards are a far better alternative because they capture flies intact without dispersing contaminants.

Ignoring the breeding source

The most common mistake homeowners make with fly control is treating the symptom (adult flies) while ignoring the cause (the breeding source). No amount of spraying, trapping, or zapping will resolve a fly problem if the source is still producing new flies. A single breeding site can produce hundreds of flies per week. The source must be found and eliminated for any other measure to have lasting effect.

Bleach in drains

Pouring bleach down a drain does not effectively eliminate drain flies. Bleach kills bacteria on contact but flows through the pipe too quickly to break down the biofilm where drain fly larvae are embedded. The biofilm clings to the pipe walls and requires physical scrubbing with a pipe brush to remove. Bacterial drain gel is more effective because it is formulated to digest organic buildup over several hours.

Foggers and bug bombs

Total-release foggers (bug bombs) are not effective for fly control. The aerosol disperses a fine mist of insecticide that kills flies currently in the room but leaves no residual protection and does not reach breeding sites inside drains, wall voids, or other hidden areas. Foggers also contaminate surfaces, require evacuation of the home, and pose fire hazards near pilot lights. Professional residual sprays applied to resting surfaces are far more targeted and effective.

How Much Does Commercial Fly Control Cost?

Commercial fly control for restaurants, food processing facilities, grocery stores, and other food-related businesses costs $200 to $500 or more per month on an ongoing service contract. Commercial fly management is a regulatory requirement in the food service industry, and the approach is far more comprehensive than residential fly control.

What commercial fly control includes

A commercial fly management program from a licensed pest control company typically includes regular inspections, insect light trap monitoring with documented catch counts, drain treatment with enzymatic or bacterial products, exterior perimeter treatment, and detailed service reports for health department compliance. Many commercial pest control companies also provide staff training on sanitation practices that reduce fly attraction and breeding.

Health department requirements

Restaurants and food service establishments must maintain documented pest control programs to pass health inspections. Fly activity in food preparation or serving areas is a violation in every state. Health departments require written pest control service records, and multiple fly violations can result in temporary closure. This regulatory requirement is why commercial fly control is an ongoing expense rather than a one-time treatment.

Industries that need commercial fly control

• Restaurants and bars
• Grocery stores and supermarkets
• Food processing and manufacturing facilities
• Bakeries and catering operations
• Hospitals and healthcare facilities
• Hotels and hospitality
• Schools and daycare centers with cafeterias
• Waste management and recycling facilities

To compare general pest control pricing, including commercial plans, see our pest control cost guide. You can also estimate costs for your specific situation using our pest control cost calculator.

When Are Different Flies Most Active?

Fly activity patterns vary significantly by species. Understanding when different flies are most active helps homeowners anticipate problems and time preventive measures appropriately.

House flies: summer pests

House flies are most active during the warmest months, typically June through September. Warm temperatures accelerate their breeding cycle, and a house fly can go from egg to adult in as little as 7 to 10 days in hot weather. Outdoor garbage and pet waste become major fly breeding sources during summer. Preventive measures like securing garbage cans, cleaning up pet waste daily, and repairing screens should be in place by late spring before fly populations build.

Cluster flies: fall and winter invaders

Cluster flies have a unique seasonal pattern. They breed outdoors in earthworm hosts during spring and summer and are generally not noticed. In September and October, as days shorten and temperatures cool, adult cluster flies seek sheltered overwintering sites. They are attracted to the sunny, south- and west-facing walls of homes and enter through gaps around windows, soffits, and the roofline. Once inside wall voids and attics, they remain dormant until warm winter or spring days trigger them to become active indoors, often appearing in large numbers at windows on upper floors.

The best time to treat for cluster flies is late August or September, before they enter the home. Applying residual insecticide to the exterior walls at that time intercepts flies before they reach entry points. Once they are inside the structure, treatment is limited to managing the flies that emerge into living spaces.

Drain flies and phorid flies: year-round

Both drain flies and phorid flies are indoor pests that are not affected by outdoor seasons. They breed in plumbing systems, drains, and moisture sources that maintain consistent conditions regardless of the time of year. A drain fly problem in January is just as likely as one in July. The trigger is typically a drain that has not been used or cleaned regularly, allowing biofilm to accumulate.

Fruit flies: late summer peak

Fruit fly populations peak in late summer and fall when garden-fresh produce is abundant and fruit ripens quickly in warm kitchens. Tomatoes, peaches, bananas, and melons are particularly attractive to fruit flies. However, fruit flies can appear at any time of year in homes where produce is stored at room temperature or drains are not cleaned regularly. The key to prevention is refrigerating produce and maintaining clean drains during peak season.

What Factors Affect Fly Exterminator Cost?

Several factors influence the total cost of professional fly treatment beyond the species involved.

Breeding source accessibility

If the breeding source is easily accessible (a dirty garbage can, a clogged drain), the treatment is straightforward and less expensive. If the source is a dead animal inside a wall void that requires drywall removal, or a broken sewer line under a concrete slab, costs increase significantly due to the labor and specialized skills involved.

Property size

Larger homes and properties require more product and more inspection time. Exterior perimeter treatment on a 4,000-square-foot home costs more than on a 1,500-square-foot home simply because there is more surface area to treat.

Number of breeding sites

A single breeding source is simpler and cheaper to address than multiple sources. In some cases, the technician may discover several contributing factors: a dirty drain, unsealed garbage, and pet waste in the yard all contributing to the fly population. Each source needs to be addressed for treatment to be fully effective.

Follow-up visits

Some fly treatments include one follow-up visit in the initial price. Others charge separately for follow-ups at $75 to $150 per visit. Ask your pest control company what is included in the quoted price before scheduling service. For blow fly and phorid fly cases, at least one follow-up should be expected.

Geographic location

Pest control pricing varies by region due to differences in labor costs and cost of living. Fly treatment in a major metro area may cost 20% to 40% more than the same service in a rural area. Southern states with warmer climates tend to have higher fly pressure and more pest control competition, which can moderate prices. Use our pest control cost calculator for pricing tailored to your area.

How to Hire a Fly Exterminator

If you determine that professional treatment is necessary, these steps help you find the right company and avoid overpaying.

• Get 2 to 3 quotes. Pricing varies between companies, and comparing quotes helps you identify a fair price for your situation.
• Ask what is included. Does the quoted price include follow-up visits? Is there a warranty or guarantee? What happens if the flies return within 30 days?
• Verify licensing. Pest control companies must be licensed in your state. Ask for the license number and verify it with your state's department of agriculture or structural pest control board.
• Ask about the inspection process. A reputable company will inspect for the breeding source before proposing treatment. Be cautious of companies that quote a price over the phone without asking questions about the type of fly or the situation.
• Understand the treatment plan. The technician should explain what species is present, where the breeding source is, what treatment will be applied, and what you need to do (sanitation, repairs, etc.) for the treatment to succeed.

For general guidance on selecting a provider, see our guide on how much an exterminator costs. You can also get free quotes from local providers through our estimate request form or by calling (866) 821-0263.

Frequently Asked Questions