Can you drink Coke on a plane?

Is it allowed to drink Coca-Cola while traveling by plane in the United States? Yes, it is generally allowed to drink Coca-Cola or any other non-alcoholic beverages while traveling by plane in the United States.



Yes, you can absolutely drink Coke on a plane, and it remains one of the most frequently served beverages in commercial aviation. Most airlines offer complimentary Coca-Cola products (including Diet Coke and Coke Zero) during their standard drink service in both domestic and international cabins. However, there is a minor scientific quirk to be aware of: the cabin pressure at 35,000 feet affects carbonation. Diet Coke, in particular, is notoriously difficult for flight attendants to pour because the lower pressure causes the CO2​ to release more aggressively, creating a massive amount of foam that takes longer to settle compared to regular Coke or water. If you bring your own Coke from the airport terminal, remember that once the can is opened at altitude, it may spray slightly. In 2026, while many airlines are moving toward sustainable packaging, the classic aluminum can of Coke remains a staple of the "inflight experience" for travelers globally.

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Carbonated beverages are allowed in checked bags, but they may explode due to changes in air pressure. Carbonated beverages are not allowed in carry-on luggage because bottles and cans are larger than 3.4 ounces.

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“Most flight attendants won't drink the tap water, coffee or tea,” she added, noting that caffeinated drinks also dehydrate you – another reason to avoid them while travelling. And before you put ice in your drink, think again. That is also often made using the very same tap water.

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1. Carbonation: Diet coke tends to be more carbonated than regular coke, which can cause the beverage to fizz excessively when poured at high altitudes. This can make it difficult for flight attendants to pour and serve the drink without it overflowing or spilling.

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It's been proven time and again that our taste buds act a little differently when we fly. This is because the drier air and cabin pressure can dull our sense of taste and smell, making certain food and drink taste a bit different than they do on the ground.

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“While plain water is best for staying hydrated, other drinks and foods can help, too,” says Theunissen. “Fruit and vegetable juices, milk and herbal teas add to the amount of water you get each day.” Consider bringing your own herbal tea bags while flying.

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Each passenger may carry liquids, gels and aerosols in travel-size containers that are 3.4 ounces or100 milliliters. Each passenger is limited to one quart-size bag of liquids, gels and aerosols.

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You can take everything in your checked baggage: from liquid to solid food. However, you are not allowed to carry liquid or gel-like food products in your carry-on baggage.

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In a 2013 blog post that continues to make the internet rounds, the flight attendant noted that because the average airplane cabin is pressurized to the equivalent of about 8,000 feet instead of sea level, soft drinks foam up more when poured out of a can. The worst culprit for this is Diet Coke,'' he wrote.

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Liquids of less than 100 ml/3.4oz are allowed through the airport security checkpoint, including alcohol, and must be placed in a single resealable quart-sized bag. However, regulations generally prohibit the consumption of personal alcohol on planes unless it's provided by the airline.

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Airport security restrictions on liquids are primarily intended to prevent the smuggling of explosive materials onto aircraft. Liquids, including drinks, can potentially conceal explosives or other dangerous items.

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Solid food items (not liquids or gels) can be transported in either your carry-on or checked baggage. TSA officers may instruct travelers to separate items from carry-on bags such as foods, powders, and any materials that can clutter bags and obstruct clear images on the X-ray machine.

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While that may seem like an easy option drinking on a plane has many negative side effects. And drinking on a plane not only affects you during the flight but possibly for days after as well. The next time you have to fly, avoid the booze. You will be more alert and readier to take care of business when you get there.

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What's False: Drinking alcohol at altitude does not affect the concentration of alcohol in your blood anymore than it does at sea-level, as this Austrian study notes. The FAA has also conducted numerous studies, further backing this evidence.

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That's why some people turn to tomato juice. Because tomato juice typically has a tartness and added spices, making the juice taste more flavorful than most drinks when in the air.

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  • Sparkling. Coca-Cola®, Coca-Cola® Zero Sugar, Diet Coke®, Sprite® Seagram's®: Ginger Ale, Seltzer Water, Tonic Water. AHA® Sparkling Water: ...
  • Juice. Minute Maid®: Apple Juice, Cranberry Apple Juice Cocktail, Orange Juice. Mott's®: Tomato Juice. ...
  • Other. illy® Dark Roast coffee (regular and decaffeinated) Hot tea.


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Tomato juice has a strong flavour that can still be tasted at high altitudes, making it a satisfying beverage choice for passengers. Additionally, tomato juice is a good source of hydration, which is especially important during air travel, as the cabin environment can be dehydrating.

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They sit on their hands during take off and landing so that if there is any turbulence they are already braced and ready for it. So, it's basically just for safety.

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If you genuinely need assistance, that's what the call button is for. If you're just thirsty and the beverage cart hasn't come yet, sit tight and be patient. Flight attendant Amanda Pleva told TPG that she's personally not one of those flight attendants that believes it's for emergencies only.

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