When you settle into an airplane window seat, you might be getting more than just a great view. Research shows that passengers sitting by the window are exposed to higher levels of ultraviolet (UV) radiation compared to being on the ground, mainly due to the thinner atmosphere at cruising altitude.
While airplane windows are designed to block most UVB rays—the kind that cause sunburn—they allow a significant amount of UVA rays to pass through. UVA rays penetrate deeper into the skin, contributing to premature aging and increasing the risk of skin cancer. The material of the window matters: both polycarbonate plastic and layered glass windows block most UVB, but can let some UVA through.
Studies published in JAMA Dermatology have found that at typical cruising altitudes of 30,000 to 35,000 feet, UVA intensity can be up to 2.5 times higher than at ground level. In one study, pilots in the cockpit received as much UVA exposure in under an hour at altitude as they would from a 20-minute tanning bed session. While this level of exposure is highest for pilots and flight crews, passengers in window seats can also be affected, especially on long flights.
However, leading health organizations, including Cancer Council Australia, state there is no credible evidence that regular passengers can get sunburned on commercial flights. The main concern is cumulative UVA exposure, which is linked to skin aging and melanoma.
Dermatologists recommend simple precautions: wear broad-spectrum sunscreen and consider covering up if you’re sitting by the window, particularly during daylight flights. While the risk for occasional travelers is low, being mindful of UV exposure in an airplane window seat is a smart move for skin health—especially for frequent flyers or long-haul journeys.
