How to get rid of flies in the house?
Written by Jack Hayes
Last updated on July 1, 2026
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To get rid of flies in the house, you need to remove what is attracting them, kill or trap the active flies, and block the places they are using to get inside. Flies usually show up indoors when there is food waste, moisture, dirty drains, pet waste, open doors, torn screens, or hidden breeding spots.
This guide is for homeowners who want fast, practical steps to control indoor flies and stop them from coming back.
Key Takeaways
◉ Flies usually enter the house for food, moisture, waste, or warmth.
◉ The fastest way to get rid of flies is to remove the source first, then trap or kill the active flies.
◉ Common breeding spots include trash cans, drains, fruit bowls, pet areas, and indoor plant soil.
◉ Different fly problems need different fixes, such as vinegar traps for fruit flies and sticky or UV traps for house flies.
◉ To stop flies from coming back, seal screens, door gaps, vents, and cracks, then keep food and waste areas clean.
Why Are There Flies in My House?
Flies are in your house because something is attracting them or giving them a place to breed. The most common causes are food waste, moisture, garbage, pet waste, dirty drains, and open entry points.
This matters because flies rarely show up for no reason. If you see a lot of flies in the house, there is usually a source nearby. It could be a trash can that needs cleaning, fruit sitting out too long, a drain with buildup, or a screen with a small tear.
Common things that attract flies include:
- ◉ Open trash cans
- ◉ Food crumbs or spills
- ◉ Overripe fruit
- ◉ Pet bowls or litter areas
- ◉ Standing water
- ◉ Dirty drains
- ◉ Doors or windows left open
The fastest way to reduce flies is to find what they are feeding on first.
Where Do Flies Come From in the House?
Flies come from outside entry points or indoor breeding spots. They can get in through open doors, torn screens, window gaps, vents, garages, and small cracks near doors or siding.
House flies often enter when doors are opened, then stay if they find food or moisture. Fruit flies and drain flies may start indoors if they find a breeding source. That is why it can feel like flies keep appearing from nowhere.
Action step: check where you see them most. Flies near windows may be coming from outside. Flies near sinks may point to drains. Flies near trash or fruit usually mean a food source is nearby.
Where Do Flies Lay Eggs Inside the House?
Flies lay eggs in moist, dirty, or decaying materials. Inside a house, that often means trash cans, food waste, drains, pet waste, rotting fruit, mop buckets, and hidden spills.
Why this matters: eggs can turn into more flies fast. Cleaning the adult flies is not enough if the breeding spot stays active.
Where Do Flies Hide in the House?
Flies hide near warm, quiet, and food-rich areas. Check windowsills, trash areas, drains, pantries, pet spaces, ceiling lights, and behind appliances.
If flies keep returning to one area, that spot usually gives them food, moisture, shelter, or easy access from outside.
A homeowner notices a few flies near the kitchen window and thinks they came in through the door. They swat them, wipe the counter, and take out the trash. For a few hours, the kitchen looks normal again.
The next morning, more flies are back in the same area.
After trying sticky traps and sprays, they call us because nothing seems to last.
During the inspection, the visible kitchen looks clean. But behind the trash bin and under the edge of a cabinet, there is a small sticky spill and moisture that has been sitting unnoticed. That hidden spot is enough to keep attracting flies and giving them a place to stay.
Once the source is cleaned and dried, the traps finally start working. That’s why fly control starts with finding what keeps bringing them back, not just killing the ones you see.
A Real Homeowner Experience With a Thorough Inspection
If flies keep coming back after cleaning, trapping, and sealing obvious entry points, it may be time to bring in professional help.
This is the kind of situation where a thorough inspection can make a big difference.
One homeowner shared that Manny inspected the house carefully, explained the process clearly, and handled the service professionally. That matters with indoor flies because the issue is not always sitting in plain sight. Sometimes the kitchen looks clean, the trash has already been removed, and the flies still keep showing up.
In a case like that, the next step is looking closer at drains, trash areas, moisture spots, pet areas, windows, doors, and hidden food residue. Once the source is found, fly control becomes much easier to manage.
How to Get Rid of Flies in the House Quickly
To get rid of flies in the house quickly, start with the source, then remove the active flies. If you only swat the flies you see, more can keep showing up from trash, drains, fruit, pet waste, or open doors.
Start here:
- ◉ Take out trash and clean the inside of the bin
- ◉ Remove food waste from counters, sinks, and floors
- ◉ Clean drains where buildup may be attracting flies
- ◉ Store fruit in the fridge until the fly activity stops
- ◉ Seal entry points like torn screens or door gaps
- ◉ Use indoor traps near windows, trash areas, and sinks
Why this matters: flies need a food source or breeding spot to keep coming back. Once you remove that source, traps work much better.
If there are a lot of flies in the house, check one area at a time. Start with the kitchen, trash can, sink drains, pet areas, and doors.
What Kills Flies in the House?
The fastest ways to kill flies inside are fly swatters, indoor fly sprays, light traps, sticky traps, and baited traps. The right choice depends on how many flies you have and where they are showing up.
For a few flies, a swatter or sticky trap may be enough. For steady activity, use indoor traps near windows, trash cans, or sinks. For larger fly problems, the source must be removed first, or new flies will keep appearing.
What works best indoors:
- ◉ Fly swatter for quick visible flies
- ◉Sticky traps near windows or light sources
- ◉ UV light traps for ongoing indoor activity
- ◉ Baited traps near trash or food areas
- ◉ Indoor-safe sprays for direct contact only
Why this matters: killing adult flies helps, but it does not stop eggs or larvae. The real fix is killing active flies and removing the breeding source at the same time.
How to Catch or Trap Flies in the House
To catch flies in the house, place traps where flies are already active. Good trap spots include windows, trash cans, sinks, fruit bowls, pet areas, and kitchen counters.
The trap type should match the fly problem. House flies often move toward light, so sticky window traps or UV light traps work well. Fruit flies are drawn to sweet, fermenting liquids, so vinegar-style traps work better near fruit or drains.
Simple indoor fly trap options include:
- ◉ Sticky window traps for house flies
- ◉ UV light traps for steady indoor activity
- ◉ Apple cider vinegar traps for fruit flies
- ◉ Covered bait traps near trash areas
- ◉ Fly paper in garages or low-traffic spaces
Why this matters: traps work best near the source. If the trap is across the room from the problem area, flies may ignore it.
What Is the Best Indoor Fly Trap?
The best indoor fly trap depends on the fly type. For house flies, UV light traps or sticky window traps usually work best. For fruit flies, a vinegar trap near fruit, drains, or trash is often more effective.
Use traps as support, not the full fix. Cleaning the source is still what stops the problem.
Can You Use Outdoor Fly Traps Inside?
No, most outdoor fly traps should not be used inside. Many outdoor traps use strong bait that can smell bad and attract more flies into the area.
For indoor spaces, use indoor-safe traps like sticky traps, UV traps, or fruit fly traps. These are cleaner and better suited for kitchens, bathrooms, and living spaces.
Use traps as support, not the full fix. Cleaning the source is still what stops the problem.
How to Get Rid of Fruit Flies in the House
To get rid of fruit flies in the house, remove the breeding source first. Fruit flies usually come from overripe fruit, dirty drains, open trash, sticky spills, recycling bins, or food residue.
Start with the kitchen. Throw away rotting fruit, wipe counters, rinse bottles and cans, and clean the trash bin. Then treat sink drains, since fruit flies often breed in slimy buildup inside the drain.
What you can do now:
- ◉ Store fruit in the fridge
- ◉ Clean sink drains with a brush and drain-safe cleaner
- ◉ Empty trash daily until activity stops
- ◉ Rinse recycling before placing it in bins
- ◉ Use vinegar traps near fruit bowls, sinks, and trash cans
Why this matters: fruit flies reproduce fast. Killing adults helps, but the problem keeps returning if eggs and larvae stay in drains or food residue.
A small vinegar trap can catch adults, but deep cleaning is what ends the cycle.
How to Get Rid of Small Flies, Gnats, or Tiny Flies in the House
To get rid of small flies, gnats, or tiny flies in the house, first identify where they are gathering. Tiny flies usually come from drains, indoor plants, damp soil, trash, fruit, or hidden moisture.
If they are near sinks, the source may be drain buildup. If they are around plants, the issue may be wet potting soil. If they are near fruit or trash, food residue is likely feeding them.
Start with these steps:
- ◉ Clean drains with a brush and safe drain cleaner
- ◉ Remove old fruit and food scraps
- ◉ Empty trash and wash the bin
- ◉ Let plant soil dry between watering
- ◉ Use sticky traps near active areas
Why this matters: small flies breed fast in damp places. Removing moisture and organic buildup stops the cycle.
How to Get Rid of Flies in Indoor Plants
Flies in indoor plants are often fungus gnats or small plant flies. They are usually caused by wet soil, decaying roots, organic matter, or overwatering.
The first step is to let the top layer of soil dry out. Many small plant flies need moisture to breed, so dry soil makes the plant less attractive. Yellow sticky traps can catch adults near the pot.
For plant flies, try this:
- ◉ Water less often and avoid soggy soil
- ◉ Remove dead leaves from the pot
- ◉ Add fresh topsoil if the surface is dirty
- ◉ Use yellow sticky traps near the plant
- ◉ Check for whiteflies under leaves
Why this matters: spraying the air will not fix the source. The problem is usually in the soil or on the plant itself.
How to Stop Flies From Coming Into the House
To stop flies from coming into the house, block entry points and remove what attracts them. Flies get inside through open doors, torn screens, window gaps, garage doors, vents, and cracks around frames.
Start outside first. Keep trash lids closed, clean bins, pick up pet waste, and avoid leaving food scraps near doors. Inside, keep counters clean, cover food, and fix moisture problems near sinks and drains.
Quick prevention steps:
- ◉ Repair torn screens
- ◉ Seal door gaps
- ◉ Keep trash covered
- ◉ Clean drains often
- ◉ Store food properly
- ◉ Close doors quickly
Why this matters: fly control works best when you stop both entry and attraction. If flies cannot get in and cannot find food, they are much less likely to stay
Still Seeing Flies Inside Your House?
If flies keep showing up after cleaning, there may be a hidden breeding spot, moisture issue, drain problem, or food source that is being overlooked. A few flies returning to the same area often means something is continuing to attract them.
AgilePests can inspect the areas where flies are active, identify what is attracting them, and explain the next steps clearly. Once the source is found, it becomes much easier to reduce fly activity and help prevent the problem from returning.
FAQ 1: How Do Drain Flies Get in the House?
Drain flies get in the house through sink drains, floor drains, basement drains, or plumbing gaps. They breed in the slimy buildup inside drains, so cleaning the pipe walls is the key step.
FAQ 2: What Causes Black, Green, or Big Flies in the House?
Black, green, or big flies often come from garbage, dead animals, pet waste, spoiled food, or open doors. Large flies usually enter from outside, then stay if they find a strong odor or food source indoors.
FAQ 3: How Do Cluster Flies Get in the House?
Cluster flies get in through attic gaps, wall cracks, vents, rooflines, and loose window frames. They often enter homes in cooler months looking for a warm place to rest.
FAQ 4: How Do Horse Flies Get in the House?
Horse flies usually get in through open doors, windows, garages, or torn screens. They are more common near yards with animals, standing water, wooded areas, or damp outdoor spaces.
FAQ 5: How to Get Rid of Garbage Flies in the House
To get rid of garbage flies, remove the source first by emptying trash, washing the bin, sealing bags, and cleaning spills. Then use indoor traps near the trash area to catch the remaining adult flies.
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