The simplest way to keep flies away from food outside is to cover it with mesh food tents whenever it’s not being actively served. Beyond that, a combination of strategies works best: removing what attracts flies in the first place, using scents that repel them, and setting traps away from your eating area. Here’s how to layer these approaches for a fly-free meal.
Cover Your Food With Mesh Tents
Physical barriers are the most reliable defense. Pop-up mesh food covers, sometimes called food tents, sit directly over plates and platters and let air circulate while keeping flies, bees, and other insects off your food. They come in a range of sizes, from single-plate covers around 11 inches across to larger tents (17 inches or more) that fit over serving dishes or multiple plates at once. Nylon mesh and metal mesh versions both work well. The nylon ones are lightweight and collapsible, making them easy to toss in a bag for picnics. Metal mesh domes are sturdier and less likely to blow around in wind.
The key is keeping food covered during the windows when nobody is actively grabbing a plate. At a barbecue or potluck, that can be most of the event. Set out covers on the serving table and get in the habit of replacing them after each pass through the line. For drinks, simple silicone cup covers or even small plates work as lids.
Eliminate What Attracts Flies
Flies find your food by smell, and they’re drawn to a predictable list of things: exposed meat, fruit, sugary drinks, condiments, and garbage. Reducing these scent signals makes a real difference in how many flies show up in the first place.
Keep raw meat covered or inside a cooler until it goes on the grill. Wipe up spills on the table as they happen, especially sugary ones like soda, juice, or barbecue sauce. Take used plates and food scraps to a trash bag promptly rather than letting them pile up. If you have an outdoor trash can nearby, make sure it has a tight-fitting lid, or move it at least 15 to 20 feet from the eating area. Flies will investigate the trash first if it’s the strongest scent source, so keeping it sealed and distant pulls their attention away from the table.
Timing matters too. Flies are most active during the warmest parts of the day. If you have flexibility, eating earlier in the morning or later in the evening, when temperatures drop, means fewer flies competing for your food.
Use Scent-Based Repellents
Flies navigate primarily by smell, and certain strong scents overwhelm their ability to locate food. You can use this against them with a few low-effort tricks.
Citronella candles are a classic choice and do provide a mild deterrent, though they work best in calm air where the scent stays concentrated around the table. A more targeted approach is placing small dishes of clove oil, eucalyptus oil, or peppermint oil near serving areas. You can also soak cotton balls in these oils and tuck them around the table. Flies strongly dislike the smell of cloves specifically. Some people cut a lemon in half and press whole cloves into the flesh, then set the halves around the table as a combined visual and scent repellent.
White vinegar or apple cider vinegar in a spray bottle, lightly misted around (not on) food, can also discourage flies from landing nearby. The vinegar smell dissipates quickly for humans but lingers longer for insects.
Set Traps Away From the Table
Fly traps work, but placement is everything. A trap set too close to your eating area will actually draw more flies toward the table before catching them. The goal is to intercept flies before they reach the food, so position any traps 15 to 20 feet away from where people are eating, ideally between the most likely fly source (compost, trash, pet areas) and your dining space.
A simple DIY trap is a jar or bottle filled with apple cider vinegar and a few drops of dish soap. The vinegar attracts the flies, and the soap breaks the surface tension so they sink and drown. Commercial baited fly traps use similar principles but with stronger attractants. These bag-style or jar traps can catch dozens of flies in a day, but they smell terrible, which is another reason to keep them well away from the table. Hang or place them downwind if possible so the bait scent drifts away from your guests rather than toward them.
Use Fans to Disrupt Flight Paths
Flies are weak fliers. A steady breeze of just 5 to 7 miles per hour is enough to keep most house flies and fruit flies from landing. A portable fan or two aimed across the table creates a zone that flies struggle to navigate. This is one of the most effective and underused strategies for outdoor dining.
Clip-on fans work well for smaller tables. For larger setups, a standing oscillating fan pointed across the serving area does the job. Battery-powered options exist for locations without outlets. As a bonus, moving air also disperses the food odors that attract flies, making the table harder for them to locate from a distance.
Plant Natural Repellents Nearby
If you eat outside regularly on a patio or deck, growing certain plants in pots near your dining area provides a passive layer of fly deterrence. Basil is one of the strongest options. Its essential oils repel house flies and can be brushed or rubbed to release more scent during a meal. Lavender, rosemary, and marigolds also produce aromatic compounds that flies avoid. Chrysanthemums contain a natural insecticidal compound that repels a wide range of insects, including flies, mosquitoes, and aphids.
Potted herbs have the added advantage of being movable. You can bring a few basil or rosemary pots directly onto the table during a meal, then return them to a sunny spot afterward. This puts the repellent scent exactly where you need it, and you get fresh herbs for cooking.
Layer Multiple Strategies Together
No single method is foolproof, but combining two or three creates a setup that dramatically reduces fly contact with your food. A practical combination for a backyard barbecue might look like this: mesh covers on all serving dishes, a fan blowing across the table, a vinegar trap hung near the trash can 20 feet away, and a couple of basil plants on the table. Each layer catches what the others miss.
For a picnic at a park where you have fewer options, mesh food covers plus a battery-powered fan and a few clove-studded lemon halves will handle most situations. The covers do the heavy lifting. Everything else reduces how often you need to lift them.