How to Keep Flies Away From Food at an Outdoor Party

By Katie, Three Sisters Party Co. · August 16, 2026

Quick Answer

Keep food covered whenever practical, bring it outside close to serving time, use smaller serving quantities and refill them, clean spills quickly, and keep waste contained.

The tables are set. The food comes outside. Guests start filling their plates.

Then the flies show up.

For a backyard graduation, birthday party, family reunion, shower, or summer cookout, flies can become one of the most frustrating parts of serving food outdoors. They seem especially interested in the foods guests are most excited about: fruit, desserts, soda, barbecue, pasta salad, and anything sweet.

And this is more than an appearance problem. Cornell Integrated Pest Management notes that some nonbiting flies can carry microorganisms from one surface to another, and certain flies may contaminate food or food serving surfaces after visiting garbage, animal waste, decaying material, or other unsanitary locations.

Fortunately, keeping an outdoor buffet comfortable does not require turning the backyard into a pest control project. The most effective strategy is much simpler:

Put food out later, keep it covered when possible, clean up spills quickly, keep trash under control, and avoid leaving large quantities of food exposed for the entire party.

For families hosting outdoor celebrations throughout Albany, Colonie, Loudonville, Latham, Delmar, Bethlehem, Clifton Park, Saratoga Springs, Niskayuna, Troy, and the surrounding Capital Region, here is how we would plan the food area.

1. Don't Put the Entire Buffet Out an Hour Before Guests Arrive

This may be the easiest improvement you can make.

There is often pressure on party morning to have absolutely everything finished before the first guest pulls into the driveway.

So the host puts the food outside early.

Then it sits there.

Instead, finish the tables, decorations, plates, utensils, napkins, and serving equipment first.

Keep the actual food inside, refrigerated, in coolers, or otherwise properly stored until you are closer to serving time.

The FDA recommends keeping cold perishable food at 40°F or below until serving and keeping hot foods hot rather than allowing them to spend unnecessary time sitting at outdoor temperatures.

Your buffet can look completely ready without the potato salad sitting outside 45 minutes before anyone wants it.

2. Cover Food Whenever Guests Aren't Actively Serving It

A cover creates a physical barrier between the food and whatever is flying through the yard.

That may be:

• a catering pan lid,
• a serving dish lid,
• foil,
• a food safe cover,
• or a mesh food dome appropriate for what you are serving.

You do not need every single item hidden from view for the entire party.

The goal is to avoid having uncovered food sitting unattended when nobody is eating.

If dinner begins at 4:00, uncover or open the food when guests are ready to serve themselves.

When the main rush ends, cover what remains.

This is particularly useful for desserts, fruit, rolls, and foods that may otherwise remain exposed for hours.

3. Use Smaller Serving Dishes and Refill Them

You do not necessarily need to place all of the food outside at once.

Imagine you prepared enough pasta salad for 75 people.

Instead of putting one enormous container on the buffet for the entire afternoon, place a smaller amount outside and keep the remainder properly chilled.

Refill the serving dish as needed.

This has several advantages.

The buffet looks fresher.

You have less food exposed at one time.

And you can manage food temperature more easily.

The same principle works for desserts.

Put out one tray of brownies rather than four.

When it becomes low, replace it.

A graduation open house may last four or five hours, but that does not mean every piece of food needs to spend four or five hours on the table.

4. Pay Special Attention to Sweet Drinks

The food buffet is not the only attraction.

Soda, lemonade, fruit punch, snow cone syrup, spilled juice, and half finished cups can quickly create another problem area.

Cornell notes that some flies are associated with fermenting fruit and sugary sources, including beverage related spills.

That means your drink station deserves the same attention as your buffet.

Use dispensers or closed containers when practical.

Keep syrup bottles capped.

Wipe up spills instead of allowing a sticky patch of lemonade to remain on the table all afternoon.

And provide an obvious place for guests to discard empty cups.

A clean drink table at noon can become surprisingly sticky by 2:00.

Give someone the job of checking it occasionally.

5. Keep Trash Close Enough to Use—but Not Beside the Buffet

Guests need to be able to find the trash can easily.

That does not mean it belongs directly beside the food.

A better setup is to place waste and recycling stations along the natural path guests take after eating.

For example:

buffet → seating → trash station

works better than:

trash can → buffet → seating.

Cornell explains that house flies commonly develop around decaying organic material such as garbage and animal waste, while other fly species are associated with wet or fermenting food material.

Use lined cans, and containers with lids are particularly useful when available.

Replace full bags before waste begins accumulating around the top.

We recently covered waste station planning in our guide to how many trash cans you need for a party. The same basic principle applies here: the easier it is for guests to properly discard food and cups, the easier the party area is to maintain.

6. Clean the Area Under the Buffet Too

Hosts naturally wipe the tabletop.

The ground underneath is easier to forget.

That is where you may find:

• a dropped meatball,
• half a roll,
• fruit,
• popcorn,
• a snow cone cup,
• cake crumbs,
• or a cup that tipped over earlier.

You do not need to patrol the yard constantly.

But during a longer open house, take a quick look around the food area every so often.

Pick up obvious scraps.

Wipe sticky surfaces.

Replace an overflowing trash bag.

This type of basic sanitation matters because effective fly management focuses heavily on removing food, wet organic material, and other sources attracting or supporting flies.

Five minutes of cleanup during the event can be more useful than trying to invent a complicated fly repelling centerpiece.

7. Keep the Dessert Table Covered Until Dessert Time

Dessert tables often go outside much too early because they are pretty.

The graduation cake is displayed.

Cookies are arranged.

Cupcakes are stacked.

Candy is poured into bowls.

Then everything waits for two hours while guests eat lunch.

Unless the dessert is intentionally part of the display, there is no rule saying it has to be outside from the beginning.

Set up the table and decorations.

Bring the food out later.

For a birthday party, wait until closer to cake time.

For an open house where people will eat throughout the day, consider putting out desserts in smaller batches.

This is especially helpful when the dessert contains ingredients that also require temperature control.

8. Don't Forget Yellowjackets

Not every unwanted guest at the buffet is a fly.

Cornell specifically describes yellowjackets as the type of insect that can quickly disrupt a picnic table. Bees and wasps are a normal part of outdoor life, but colony building species may become a stinging hazard, particularly when nests are close to areas where people gather.

Sweet beverages and food can make the problem more noticeable during an outdoor event.

Before party day, look around the main guest areas.

If you are seeing repeated yellowjacket activity coming from the same hole in the ground, wall opening, structure, or another concentrated location, do not wait until 50 guests are standing nearby to investigate.

Cornell recommends professional help for large yellowjacket or hornet nest removal.

Do not ask children or guests to swat at insects around the buffet.

And do not place an active food station beside a known nest.

9. Separate the Drink Station From the Main Food Buffet

We recommend separate food and beverage areas for several reasons.

Fly control is one of them.

Drinks tend to create repeated small spills.

Guests open bottles.

Ice melts.

Cups tip.

Kids pour their own lemonade.

Keeping that activity on a different table helps prevent the main food buffet from becoming sticky.

It also reduces congestion.

Someone deciding what to drink does not need to stand in front of the chicken while someone else is trying to serve dinner.

If you have enough room, think of the party as a few simple stations:

• food
• drinks
• dessert
• trash and recycling

They do not need to be far apart.

They simply do not need to occupy one giant crowded table.

10. Keep Beverage Ice Separate From Food Storage

If you use coolers, organizing them by purpose helps.

The FDA specifically recommends considering one cooler for beverages and another for perishable foods. Beverage coolers tend to be opened much more frequently, allowing more warm outdoor air inside.

That is useful for your overall party setup too.

The drink cooler can stay near guests.

The food cooler can remain closed until something is needed.

If you have clean ice intended for cups or a snow cone machine, keep that supply separate as well.

The goal is to avoid one cooler becoming the refrigerator, drink station, serving ice container, and snow cone supply for the entire party.

11. Food Covers Don't Replace Temperature Control

This distinction is important.

A mesh cover may keep a fly from landing on the macaroni salad.

It does not keep the macaroni salad cold.

Food protection and food temperature are two different jobs.

FDA outdoor food guidance says cold perishable foods should remain at 40°F or below, while hot foods should be held at 140°F or above. Perishable foods should generally not remain in the 40°F to 140°F range for more than two hours, or more than one hour when outdoor temperatures exceed 90°F.

For cold items, that may mean:

• keeping backup food in the refrigerator or cooler,
• setting appropriate dishes over ice,
• or bringing smaller portions outside.

For hot food, use appropriate hot holding methods and monitor the actual food temperature.

Three Sisters Party Co. food warming mats can help maintain already hot food at serving temperature, but they are not intended to cook cold food or replace temperature monitoring.

12. Set Out Serving Utensils With Every Dish

When a serving utensil disappears, people improvise.

They borrow a spoon from another tray.

They reach into a bowl.

They move utensils between foods.

Having the correct spoon, tongs, or serving utensil available for each dish makes the buffet cleaner and easier to use.

FDA guidance emphasizes keeping serving utensils and platters clean and avoiding cross contamination between raw and cooked foods.

For a backyard party, keep a few clean backup serving utensils nearby.

If one falls on the grass, replace it.

Do not rinse it with the garden hose and put it immediately back into the potato salad.

13. Create a Simple Hand Washing Plan

When the party is at home, this may simply mean making sure guests can easily reach a bathroom with soap and clean hand drying supplies.

If you are hosting at a park, pavilion, or another outdoor location, think about hand cleaning before food service begins.

FDA guidance says outdoor food safety begins with clean hands and surfaces. Where running water is unavailable, the agency suggests options such as a water jug with soap and paper towels or disposable moist towelettes.

This becomes especially important if the same group of children is alternating between backyard games and the snack table.

14. Keep Concession Areas Clean as You Go

Popcorn, cotton candy, and snow cones are supposed to be fun.

They are also capable of producing some extremely attractive spills.

Popcorn gets crushed underfoot.

Cotton candy sugar becomes sticky.

Snow cone syrup finds places you did not know syrup could reach.

Three Sisters Party Co.'s current concession rentals are customer-operated, so the host is responsible for normal operation and basic cleanup during the rental.

Keep paper towels and a small cleanup supply near the station.

Clean noticeable syrup spills quickly.

Close supplies when they are not being used.

Keep the trash container convenient but not directly against the machine.

And at the end of service, remove leftover disposable cups, cones, bags, and food scraps instead of leaving the entire station outside overnight.

15. Be Careful With Pest Control Products Around Food

A backyard party is not the time to start spraying random insect control products around an open buffet.

Do not spray pesticides onto tables, rental equipment, food service areas, dishes, or exposed food unless the product is specifically labeled for that use, and follow the label exactly.

Cornell also warns that certain pest strips are not intended for fly management where food is prepared or served or in areas occupied for extended periods.

If your property has a significant ongoing fly problem rather than the occasional fly attracted to party food, address the underlying source before the event.

Cornell's fly management guidance emphasizes finding and eliminating breeding sources such as wet organic material rather than simply trying to kill the adult flies you see.

16. Don't Build the Party Around Internet “Fly Hacks”

Search online and you will find dozens of ideas involving:

• pennies in water,
• essential oils,
• citrus,
• cloves,
• special plants,
• bags hanging from strings,
• and homemade mixtures.

Some may smell pleasant or become part of your decorations.

But they should not be your food protection plan.

Your highest-value steps are much more boring and much more practical:

• keep food covered,
• limit how long it sits outside,
• maintain proper temperatures,
• clean spills,
• manage trash,
• and remove scraps.

Those actions improve the buffet whether you see one fly or twenty.

17. Think About Timing at an Open House Graduation Party

Graduation parties create a special challenge because guests may arrive over several hours.

You might have 75 people attending the party, but only 30 are there at 1:00.

Then another group arrives at 2:30.

That does not mean the entire food supply has to sit outside from noon until 5:00.

Create a refill plan.

Put out enough food for the current crowd.

Keep backup trays properly stored.

Replenish the buffet.

Do the same with desserts and disposable supplies.

The table looks better, the food spends less time exposed, and you are less likely to discover at the end of the day that a tray intended for the final guests has been sitting outside since before the first guest arrived.

18. A Good Buffet Setup Makes All of This Easier

The physical layout matters.

Give yourself enough table space that food is not stacked on top of itself.

Keep beverages separate when possible.

Provide room for covers and lids.

Leave space for guests to comfortably serve themselves.

Put trash where people can find it.

Keep concessions away from the main food line.

And make sure whoever is helping with the party can easily reach the buffet to replace a tray or wipe a spill.

This is another reason we recommend planning party tables by function, not merely counting how many tables guests need for seating.

Some tables are for people.

Others make the party work.

Frequently Asked Questions

What is the easiest way to keep flies off food at an outdoor party?

Keep food covered whenever practical, bring it outside close to serving time, use smaller serving quantities and refill them, clean spills quickly, and keep waste contained. Cornell's fly guidance emphasizes sanitation and removing food or organic material that supports fly activity.

Do mesh food covers work?

They provide a physical barrier that can prevent insects from directly landing on covered food. Remember that a cover does not control food temperature.

Should I put all of the food out before guests arrive?

Usually there is no need. Keep perishable food properly refrigerated, cooled, or hot held until closer to serving time. FDA guidance stresses maintaining safe temperatures during outdoor food service.

How long can party food sit outside?

FDA guidance says perishable food generally should not remain between 40°F and 140°F for more than two hours, or more than one hour when outdoor temperatures are above 90°F.

How do I keep flies away from a dessert table?

Keep desserts covered when practical and consider bringing them out closer to dessert time rather than displaying all of the food from the beginning of the party.

Why are flies gathering around the drink station?

Sweet drinks and spills can create attractive food sources. Cornell notes that some fly species are associated with fermenting fruit and sugary beverage related material.

Should the trash can be beside the buffet?

Make it convenient, but give the food some separation from waste. Use lined containers and remove full bags promptly.

What about yellowjackets around party food?

Yellowjackets commonly forage around outdoor eating areas, and nests close to where people gather can create a sting hazard. Cornell recommends professional assistance for large yellowjacket or hornet nest removal.

Can I spray bug spray around the buffet?

Do not apply pesticides or pest control products around food or food contact areas unless the product is specifically labeled for that use, and always follow its label.

Do warming mats keep flies away?

No. Warming mats and fly prevention serve completely different purposes. Warming mats can help maintain already hot food at serving temperature; food should still be protected appropriately and monitored for temperature.

Make the Buffet Less Interesting to the Bugs

You probably cannot guarantee that a fly will never visit an outdoor party.

You can make your buffet much less inviting.

Keep the food inside until you actually need it. Cover what is not being served. Put out smaller amounts and replenish them. Clean sugary spills. Keep waste contained. Separate drinks from food when space allows. And maintain safe food temperatures throughout the party.

Those are simple steps, but together they make a major difference.

And unlike many internet tricks, they also make the entire buffet cleaner, safer, and easier for guests to use.

Three Sisters Party Co. provides tables, chairs, concession machines, backyard games, food warming mats, coffee urns, outdoor movie equipment, and party packages for celebrations throughout the Capital Region. Current rental details and setup expectations are available on the Packages & Pricing page.

View our Packages and Pricing, use the Party Rental Calculator, or check availability for your event date and address.

For families hosting outdoor celebrations throughout Albany, Colonie, Loudonville, Latham, Delmar, Bethlehem, Clifton Park, Saratoga Springs, Niskayuna, Troy, and the surrounding Capital Region.

See packages and pricing, try the party rental calculator, or check availability.