Is it bad to drink coffee before flying?

According to a review published in 2022 in the journal Nutrients, coffee increases stomach acid, which can cause Gi issues such as acid reflux or even stomach ulcers, especially when people drink coffee on an empty stomach.



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It's a list of four things you definitely should NOT eat or drink right before hopping on a plane . . .
  • Salty foods. It's common for people to get dehydrated on planes, thanks to the dry air in the cabin. ...
  • Carbonated beverages. ...
  • Alcohol. ...
  • Coffee.


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Tap Water (Including in Coffee and Tea) As T+L previously explained, the water tanks on planes are notoriously grimy. A 2004 EPA sample of 158 planes found that 13 percent contained coliform, and two had dangerous levels of E. coli. Fogwell added, don't be fooled by a water pitcher either.

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The answer is: of course, pilots drink coffee! Like any other profession it provides many benefits. Coffee is a great pick me up after a long flight, a good way to get into a morning routine and an all-around comfort while traveling thousands of feet above the ground.

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Eat Light. Contrary to popular belief, flying on an empty stomach doesn't help you combat air sickness. In fact, an empty stomach actually exacerbates symptoms. Eat a light meal such as crackers, fruit, and other light snacks.

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“Probably the best thing you can do before (and during) your flight is drink water,” says Aviva Rubin, MS, RDN. “Water prevents dehydration and reduces jet lag while keeping you from feeling lethargic.” Keeping yourself sufficiently hydrated is a simple way to get your flight off on the right foot.

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While at the airport, 6.3 % of those surveyed said they had consumed edibles and 2.6% had smoked pot, compared to 88% who said they had at least one drink before boarding a plane. The most common reason given was to relax (71%), to sleep (46%), to ease anxiety (40%) and “just for fun” (25%).

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Drinking prior to a flight, combined with the low cabin humidity, lowers your resistance to cold and flu germs, making you more susceptible to sickness. Stick to just one alcoholic drink, if possible, and then glug down plenty of water to ensure you are well hydrated before you get on the plane.

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“Probably the best thing you can do before (and during) your flight is drink water,” says Aviva Rubin, MS, RDN. “Water prevents dehydration and reduces jet lag while keeping you from feeling lethargic.” Keeping yourself sufficiently hydrated is a simple way to get your flight off on the right foot.

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FAA requires 8 hours from bottle to throttle. Some company rules are more restrictive. 10 or 12 hours before any assigned duty is common. If I'm on call the next day then I have to stop drinking 10 hours before my reserve time starts.

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Top 5 travel tips to help you prepare for a long-haul flight
  1. Wear comfortable clothing. ...
  2. Stay hydrated. ...
  3. Exercise before you fly. ...
  4. Eat nutritious food. ...
  5. Practice meditation and yoga.


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It should come as no surprise that the healthiest thing to drink on a plane is water, which also happens to be the healthiest thing to drink on land. Inside an airplane cabin, the air is extremely dry, putting you at heightened risk of dehydration.

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As a general rule of thumb, I try to stop my water intake two or so hours before my flight is scheduled to depart, the reason, I would think, is obvious — I want to use the plane bathroom as little as possible.

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If you don't shower after your flight you may end up depositing germs that aren't your own into your new space; particularly your bed. But showering with soap, and shampoo for the hair, removes any of the germs you may have picked up, as well as reduces the levels of your own that have grown over time.

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10 Foods You Should Never Eat Before Flying
  • Red Meat. Courtesy of Ethan Calabrese. ...
  • Coffee. Airplanes already dry up your body to begin with, so combined with the dehydrating properties in caffeine, you could easily develop a headache or become nauseous.
  • Alcohol. ...
  • Beans. ...
  • Apples. ...
  • Broccoli. ...
  • Carbonated Drinks. ...
  • Spicy Food.


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  • Hygiene items and prescriptions. On your travels, the last thing you want to forget is any essential hygiene or medical item. ...
  • A reusable water bottle. Bringing a reusable bottle saves money and keeps you hydrated. ...
  • Portable power banks. ...
  • Towelettes. ...
  • A quick-dry towel. ...
  • Plastic bags. ...
  • A packable backpack. ...
  • Bottle protectors.


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Pilots can and sometimes do smoke in the cockpits of business jets. These can be as large as airliners (see BBJ), but usually aren't. Even when a country and/or airline ban smoking in the flight deck, some pilots will ignore the ban and still light up.

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Keyes said those kinds of incidents are “rare but not unheard of,” with at least a few reports each year of intoxicated pilots being kept from flying. Airlines also have programs to encourage pilots to voluntarily get treatment in cases of alcoholism, he added.

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