Wearing your seatbelt isn’t the only safety precaution you should take on an airplane.

By Melanie Lieberman
March 25, 2016
Credit: Getty Images

If you thought you only needed to pack sunscreen for a beach vacation, think again: according to the Daily Mail’s Georgia Diebelius, you’re at risk for a sunburn every time you board an airplane.

We asked Dr. Doris Day, a New York City dermatologist and author of Forget the Facelift, who also told Travel + Leisure readers what to look for in a sunscreen, to weigh in on the topic. In her words, “it could be a concern.”

“The fact is, flying at 30,000 feet [for 60 minutes] can be as dangerous as 20 minutes in a tanning bed,” Day said.

If you consider that, while traveling at cruising altitude, you’re nearly six miles closer to the sun than you would be lounging poolside at ground level, it’s easy to see how damaging that sunshine through your airplane window can be.

While the glass blocks standard UVB rays, more harmful UVA rays can still pass through. “We now know that all wavelengths of ultraviolet radiation are known carcinogens,” Day said. “Enough exposure will lead to both premature aging and skin cancer.”

No one is at greater risk than pilots, who—the New York Times reported—have a known higher incidence of skin cancer. Experts suspect this could be due to regular, extended flight time in front of a large window.

Even though you’re next to a small window (and probably spending far less time in the sky than pilots), it’s important to take precautions while traveling. Fortunately, you don’t have to abstain from the window seat altogether.

“Keep the blinds down when you can, and wear sun protection that is broad spectrum and specifically says UVA protection,” Day said. (You can check out some of our favorite sunscreens here.) “There is also a drugstore supplement called Heliocare that gives a little [additional] UV protection. It doesn’t replace the need for a sunscreen, but it can provide extra protection.”

If you’re a frequent flyer and are still concerned about clocking too many hours of sunlight on an airplane, consider moving over to the middle seat.

Melanie Lieberman is the Assistant Digital Editor at Travel + Leisure. Follow her on Twitter and Instagram at @melanietaryn.