How do you keep food cold on a long flight?

If the food you're traveling with needs to stay at refrigerator temperatures, pack it in a cooler that can be counted as checked luggage. For longer flights, or times when you suspect there may be delays, consider freezing the item you're flying with, especially if it's a meat, casserole, or soup.



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Keep the food at 40 degrees F or colder. Pack your cooler with several inches of ice or use frozen gel-packs, frozen juice boxes or frozen water bottles. Block ice keeps longer than ice cubes. Use clean, empty milk or water jugs to pre-freeze blocks of ice.

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The TSA allows passengers to bring almost any food items, as long as they're not liquid and don't go more than 3.4 oz. (100ml). Make sure your food doesn't exceed that amount. So if you're bringing salad dressing, maple syrup, creamy dips, salsa, etc., secure them inside a sealed container.

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The first one that comes to mind is a simple ham and cheese sandwich on a baguette with cornichons and a little butter.

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Foods you can't pack in your carry-on
Think: creamy cheeses, liquid chocolate, liquid coffee, creamy dips and spreads, gravy, honey, hummus, ice cream, jam, jelly, juice, syrup, peanut butter, salad dressing, sauce, salsa, soda, soup and yogurt.

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Hearty Sandwiches A big sandwich is the ultimate answer to flight-friendly eats—it's easy to pack and fills you up. The key is to choose fillings that keep well for a handful of hours without refrigeration: cheese, cured meats (think prosciutto), hummus, grilled vegetables, and greens.

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In the absence of a cooler, a cooler bag should be fine. They also work well in case you are short of space or do not have a lot of food. Once again you want something of high quality to last the trip.

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You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.

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Because the TSA considers the nut spread a liquid, plane passengers must limit the amount they bring in their carry-ons. Like all other liquids, passengers are limited to 3.4 oz or less of peanut butter in their carry-on bag, but can also put the snack in their checked baggage.

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The reason why water is not allowed through airport security is that there are some explosive chemical liquids such as nitroglycerine, that are indistinguishable from water when looked at.

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There's a reason for it, it's not just made up. Salt water is considered mildly corrosive - aka may rust things. Sure, most of the metal in a plane is aluminum (and now carbon composite in the 787 and A350), but not all of it.

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“Eat lean protein such as nonfat yogurt, turkey, or chicken to make you feel full and fuel your brain,” Rubin recommends. Maximize the benefits by combining lean protein with fruits or veggies. “The best combo is some protein with some good-for-you carbs like fruits, veggies and whole grains,” says Bowerman.

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It's a great way to make sure that you stay hydrated, and it doubles as a useful souvenir.
  • 10 Great Snacks for Long Flights. Below, you'll find a list of some of our favorite snack ideas for long-haul flights. ...
  • Trail Mix. ...
  • Dried Fruit. ...
  • Homemade Sandwiches. ...
  • Hummus. ...
  • Granola Bars. ...
  • Cheese and Crackers. ...
  • Fresh Fruits and Veggies.


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Yes, solid food is allowed through TSA security in any amount. If the item is considered a liquid, paste, cream, gel, or aerosol, it is still allowed, but must be smaller than 3.4 ounces. Otherwise, you'll be required to check the item or throw it out.

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