Flying ants are regular ants with wings, and most swarms disappear on their own within a few days. They appear during mating season, typically between June and September, when warm, humid weather triggers colonies to release winged males and females for their one-time mating flight. If they’re swarming outdoors, the simplest answer is to wait them out. If they’re inside your home, you’ll want to act faster and figure out whether they signal a bigger problem.
First, Make Sure They’re Not Termites
Before you do anything, confirm you’re actually dealing with flying ants and not termite swarmers, which look similar at a glance but mean very different things for your home. Three features make the distinction clear:
- Waist: Flying ants have a pinched, narrow “wasp waist” between the thorax and abdomen. Termites have a thick, straight body with no visible waist.
- Wings: A flying ant’s front wings are noticeably longer than its hind wings and tinted brown. Termite swarmers have four wings of equal length that are pale and translucent.
- Antennae: Ant antennae are bent or elbowed. Termite antennae are straight.
If you see straight antennae, equal-length wings, and no waist, you’re looking at termites, and that calls for a professional inspection rather than a DIY fix.
Why They’re Swarming Right Now
Flying ants aren’t a separate species. They’re the reproductive members of an existing ant colony, produced specifically for a mating flight. When conditions are right (warm, calm air, often after a stretch of summer rain), thousands of winged ants leave the nest simultaneously. The mass emergence helps overwhelm predators and gives individual ants a better chance of finding a mate from a different colony.
There’s no single “flying ant day.” The Natural History Museum describes it as a flying ant season, with multiple peaks over several weeks, each lasting only a few days. Urban areas tend to see swarms earlier than rural ones because cities run warmer. Once the mating flight is over, males die quickly, and mated females shed their wings and search for a place to start a new colony. The swarm itself is temporary.
Getting Rid of a Swarm Indoors
If flying ants are pouring into your house, here’s how to deal with them immediately.
A vacuum cleaner is your fastest tool. Suck up the swarmers, seal the vacuum bag, and throw it in an outdoor bin. For scattered stragglers, a simple mixture of dish soap and water in a spray bottle works well. The soap breaks the surface tension on their bodies and kills them on contact. You can also hang sticky fly traps near windows and light sources, since flying ants are drawn to light.
Try to trace the ants back to where they’re entering. Common entry points include gaps beneath entrance doors, window sills, and the seam where exterior siding meets the foundation wall. Once you find the entry point, seal it temporarily with tape or caulk while you deal with the immediate swarm.
Eliminating the Colony
Killing individual flying ants only removes the ones you can see. If the colony is nesting in or near your home, new workers (and eventually new swarmers) will keep appearing. The key is getting poison to the queen, who never leaves the nest.
Borax Bait
Borax is a slow-acting stomach poison that works because of how ants feed each other. Worker ants drink liquid bait, carry it back to the nest in a “social stomach,” and regurgitate it to feed the queen and larvae. This mouth-to-mouth food sharing is why the bait concentration matters enormously.
The effective recipe uses a 1% to 2% borax concentration. Too strong and the worker dies on your kitchen counter before it ever reaches the queen. A proven ratio: mix half a cup of warm water with a quarter cup of sugar and half a teaspoon of borax. This creates roughly a 1.5% solution, weak enough that workers survive 24 to 48 hours after feeding, giving them time to share the toxic syrup deep inside the nest. Place the mixture in shallow dishes or soaked cotton balls along the trails you’ve spotted.
Commercial liquid ant baits use the same active ingredient. Terro baits, for instance, contain borax at 5.4%, which works well for large colonies but can sometimes kill workers too quickly in smaller nests. The DIY version gives you more control over the concentration.
Give the bait several days to a week to work. You may actually see more ants at first as workers recruit others to the food source. That’s a good sign: it means more poison is reaching the nest.
Essential Oils as Repellents
Peppermint oil, tea tree oil, cinnamon oil, and eucalyptus oil are commonly recommended as natural ant repellents. They can provide temporary relief. Peppermint oil masks the pheromone trails ants use to navigate, which confuses foragers. Clove oil contains compounds that kill ants on contact. But none of these reach the colony or the queen, and ants typically find new paths around treated areas.
If you want to use them as a supplement to baiting, mix the oil with water in a spray bottle and apply it around doors, windows, and other entry points. Reapply regularly, since the scent fades. Think of essential oils as a temporary barrier, not a solution.
Check for Carpenter Ant Nests
Most flying ants are nuisance species that nest outdoors in soil. Carpenter ants are the exception worth worrying about. They excavate wood to build their nests and can cause real structural damage over time.
The timing of the swarm is your first clue. Seeing winged ants indoors during late fall, winter, or early spring almost always means a colony is nesting inside your home, since outdoor colonies wouldn’t be swarming in cold weather. During summer, indoor swarmers could be coming from either an indoor or outdoor nest.
Look for piles of coarse sawdust (called frass) mixed with dead ant parts near baseboards, window frames, or ceiling joints. Carpenter ants prefer wood that stays wet: areas around leaky pipes, drains, dishwashers, under leaky roof shingles, and around poorly sealed windows and doors. They’ve also been found in dry spots like hollow-core doors, false beams, and foam insulation board. If you find frass or suspect a carpenter ant colony inside your walls, professional treatment is worth the cost to prevent ongoing structural damage.
Preventing Flying Ants From Returning
You can’t stop ants from swarming outdoors, but you can make your home much harder for them to enter and less attractive as a nesting site.
Seal gaps around door thresholds, windows, and any openings where utility pipes and wires enter the building. Pay attention to cracks and seams created by baseboards, mortar joints, the foundation-siding interface, and the tack strip beneath carpet edges. Silicone caulk and weatherstripping handle most of these gaps.
Trim shrubs and tree branches that touch or overhang your home. Vegetation in contact with the building acts as a bridge for ants to bypass foundation-level barriers. Keep firewood stored well away from the house and off the ground.
Address moisture problems aggressively. Fix leaky faucets, repair damaged roof shingles, and make sure gutters drain away from the foundation. Carpenter ants specifically seek out damp wood, so eliminating moisture removes their preferred habitat. Good ventilation in crawl spaces, basements, and attics helps keep wood dry enough to be unappealing.
Inside, keep food sealed and surfaces clean. Ants scout for sugar and protein sources, and a single trail of crumbs can recruit hundreds of foragers. Wiping down counters and sweeping regularly removes the scent trails that lead other ants to food.