Best Sprays to Kill Flies

Updated for 2023

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BEST OVERALL
Cutter Backyard Bug Control Outdoor Fogger (2 Pack), Kills Mosquitoes, Fleas & Listed Ants, 16 fl…
$12.37
What We Like

Kills mosquitoes and other flying insects on contact while also working as a repellent.

BEST ALL-NATURAL
Eco Defense USDA Biobased Pest Control Spray – Ant, Roach, Spider, Bug Killer and Repellent -…
$19.95
What We Like

The high ratings, non-toxic formula, and wide variety of uses make this our favorite all-natural spray.

BEST FOR LARGE AREAS
Harris Home Insect Killer, Liquid Gallon Spray with Odorless and Non Staining Residual Formula -…
$25.40
What We Like

The value of this highly effective insect killer and long-lasting formula make this our favorite for applying around home perimeters and large areas.

How We Found the Best Sprays to Kill Flies

8 Reviewers

48 Products Considered

13 Hours of Research

3 Products Reviewed

3 Top Picks

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Best Sprays to Kill Flies

Flies can spread illnesses to humans more readily than most people might expect.

Flies feed on both human food as well as germy and rotten material. The common house fly picks up disease-causing germs as they feast on garbage, rotting objects, and feces.

Those microbes that remain on the outside of a fly might survive for a handful of hours. However, viruses and bacteria that flies ingest may persist in the fly’s gut for several days. Transmission often happens when a fly regurgitates on spots people touch or directly on our food. This is why we’ve selected our favorite sprays to kill germy flies (and other insects) for your specific pest-eradication needs.

BEST OVERALL

Cutter Backyard Bug Control Outdoor Fogger

$12.37 Amazon Prime
Buy on Amazon

Last update on 2024-03-28 / Affiliate links / Images from Amazon Product Advertising API

Features & Specs
  • Treats up to 1,200 cubic ft
  • Uses tetramethrin and phenothrin
  • Less than $10 per can

The Cutter Backyard Bug Control Fogger works to eliminate insects that are in your immediate area while also working to prevent additional infestations. The pack comes with two foggers at a great price – less than $10 per can.

To use, all you need to do is spray the product around the areas where you’ll be outside and would like to eliminate insects. If you see swarms of gnats or mosquitoes, the product will kill them directly on contact. You should also spray a perimeter around your home to prevent more insects from reproducing nearby. Spraying around doors and windows can also prevent bugs from getting inside the home, but you’ll need to make sure you aren’t spraying directly inside your home.

Before use, be sure to spray when it isn’t windy or rainy outside. You should also make sure there aren’t any pets or children nearby, since the ingredients may be toxic if inhaled. After you’re done spraying, wait a couple minutes to make sure the product is settled and there aren’t any mists or vapors lingering.

Cutter recommends retreating as necessary, but no more than once per day. With proper use, you’ll be able to enjoy your backyard without biting and swatting.

BEST ALL-NATURAL

Eco Defense Organic Home Pest Control Spray

$19.95 Amazon Prime
Buy on Amazon

Last update on 2024-03-28 / Affiliate links / Images from Amazon Product Advertising API

Features & Specs
  • On bottle contains 16 ounces
  • Around $20 per bottle
  • Can be used as an insect prevention spray
  • No aerosol can to worry over
  • Also available in 32-ounce and one-gallon sizes
  • Active ingredients are sodium lauryl sulfate, geranium oil, and peppermint oil

We love Eco Defense Organic Home Pest Control Spray for its environmentally-friendly, child and pet-safe quality. As a bonus, it actually works without the poisons. It not only kills flies, but also works on silverfish, earwigs, mites, and some spiders. The great thing about the non-toxic formula is that you can use it nearly anywhere in your home, around the perimeter of your house, in your yard, on windowsills, along doorways—basically, anywhere insects might hide or enter.

This spray is excellent if you are concerned about insects in kids’ rooms or around pet beds. The lack of poisonous chemicals means you can couple this spray with other methods of insect removal or prevention, too, for even more effective results and without the concerns of cross-contaminating harsh chemicals.

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BEST FOR LARGE AREAS

Harris Home Insect Killer, Liquid Gallon Spray

$25.40 Amazon Prime
Buy on Amazon

Last update on 2024-03-28 / Affiliate links / Images from Amazon Product Advertising API

Features & Specs
  • Continues to work for up to one year
  • Around $20 per container
  • The container is one gallon, 128 fluid ounces
  • Active ingredient is deltamethrin

Harris Home Insect Killer, Liquid Gallon Spray is an odorless and non-staining formula that not only kills flies, but also kudzu bugs, roaches, silverfish, stink bugs, ants, and more. We love this spray for its value and the long-lasting perimeter protection around homes. It comes with an attachable hose sprayer, and the one-gallon container has a built-in handle for easy application around large areas.

This spray is ideal for applying all around your house, along your windows, doorways, garage doors, basements, in attic openings—basically, anywhere bug might enter and cross the path of this deadly formula. It can kill insects on contact, but it also leaves behind an insecticide that can last up to a full year to help prevent bugs from getting inside your house. Use caution around kids and pets until dry.

Trying to get rid of flies for good?

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Just as flies will look for food, critters such as roaches and ants will also seek out crumbs and rotting pieces of food, even if they are small or hiding under cabinets.

Disease Risks of Flies

House flies are germ-laden insects. Several types of flies visit places such as garbage dumps and sewers. They also feed on fecal matter and animal wounds—indeed, disgusting, which is why it’s important to keep them away from your food or out of your home. Flies also eat decaying matter like spoiled meat and rotten objects.

House flies are deduced by several health organizations of transmitting, at a minimum, 65 illnesses to humans. These can include typhoid fever, cholera, dysentery, anthrax, leprosy, and tuberculosis. Flies regurgitate and excrete wherever they land and rest, thereby spreading disease organisms anywhere they settle for a few moments. Obviously, it’s crucial to keep your home sanitary to prevent flies. Once they enter, it’s just as important to get rid of them quickly.

Dealing with Flies Around Your Home

There is a basic set of rule to manage flies in your home. This is the four main steps to deal with fly populations around your house. First, maintaining a clean and sanitized home sans decaying garbage, food left out in the open, or rotting fruit sitting about is crucial. Cleaning up dog waste in your yard is also a surprisingly important part of this first step, as is keeping sturdy lids on outdoor garbage containers to prevent flies from being lured nearby.

Exclusion, or always keeping a barrier between the outside and your indoors, is the second step in the protocol. Open your windows for fresh air, but be sure screens are in always in place, are installed securely and do not have holes or damage that would allow flies inside.

Non-chemical procedures, such as fly traps and papers, are the suggested first step in removing flies from your house if they get inside. If you can’t deal with fly sticky traps or paper, sprays like the ones we’ve listed here are a good alternate option.

Lastly, outdoor chemical control exists if you have a severe fly problem and can be called upon as a last resort. These do require more extreme poisons that usually necessitate professional application.

Other Insects

These sprays also kill or help prevent several other insects and bugs, such as silverfish, stink bugs, mites, scorpions, and cockroaches. The same rules apply for preventing infestation of many of these pests, too.

Keeping a sanitary home, and particularly with roaches, maintaining a dry house is crucial. Cockroaches often seek out moisture for hydration in homes. Just as flies will look for food, critters such as roaches and ants will also seek out crumbs and rotting pieces of food, even if they are small or hiding under cabinets.

Sustaining a spotless home (as much as possible), using a dehumidifier if needed, having sturdy screens, and setting up a barrier with sprays like these products will go a long way in keeping bugs out of your house.

Trying to get rid of flies for good?

Get a FREE Quote & BEST PRICE from a local exterminator

(866) 470-1609

Available Next Day

No Obligation Assessment

Guarantee Results