September 30, 2026 · Creamed

Do You Need Sunscreen on a Plane? Flights and Airport Days

Travel days get treated as time off from sun protection. They are not. Most of a flight day is spent in daylight, at an altitude or in an airport where the exposure is easy to underestimate, and the one measurement that exists for a plane is more interesting than most travel advice admits.

What the research actually measured on a plane

There is real data here, and it is worth stating precisely rather than dramatically. A 2015 research letter in JAMA Dermatology by Sanlorenzo and colleagues took UV readings inside flying aircraft. At 30,000 feet over Las Vegas the measured UV-A was about 242 microwatts per square centimeter. For comparison, the same group measured a UV-A-only tanning bed at 706. Their conclusion: "Pilots flying for 56.6 minutes at 30 000 feet receive the same amount of UV-A carcinogenic effective radiation as that from a 20-minute tanning bed session."

The glass matters too. They report that "UV-B (280-320 nm) transmission through both plastic and glass windshields was reported to be less than 1%. However, UV-A (320-380 nm) transmission ranged from 0.41% to 53.5%, with plastic attenuating more UV radiation than glass." And the numbers are not a ceiling: "These levels could be significantly higher when flying over thick cloud layers and snow fields, which could reflect up to 85% of UV radiation."

The honest caveat, which most articles on this leave out

Those readings were taken at cockpit windshields, and the paper's conclusion is about pilots: "Airplane windshields do not completely block UV-A radiation and therefore are not enough to protect pilots." A cockpit windshield is a large panel of glass at the front of the aircraft, angled at the sky, with a crew sitting behind it for a full working day. A passenger window is small, usually acrylic, and most of the cabin is not next to one.

So the right takeaway is not that a passenger in row 24 is in a tanning bed. It is narrower and still useful: UV-A at altitude is strong, aircraft glazing reduces UV-A by an amount that varies enormously, and nobody has published a figure for the seat you are in. What is settled independently of that study is the American Academy of Dermatology's plain statement that UVA rays "can pass through window glass." A sunlit window seat on a long daylight flight is UV-A exposure of some size. It is not zero, and it is not measured.

The airport is the part nobody plans for

Add up a travel day and the flight is often not the largest share of it. The rideshare queue, the walk across an open apron to a regional aircraft, the smoking area, the outdoor observation deck, the two-hour layover spent outside because the terminal is unbearable, the taxi rank on arrival: that is unshaded midday sun in a city you may not know the UV index of.

The CDC gives a threshold rather than a vibe: "When the UV Index is 3 or higher in your area, protect your skin from too much exposure to the sun." It also notes that UV "reflects off of surfaces like water, cement, sand, and snow." An airport is mostly cement. A day of terminals and taxi ranks is a day on reflective ground.

Where the sun lands on a flight day

  • The window-side face, ear and shoulder. Not a study finding, just geometry. If the shade is up and the sun is on your side of the aircraft, one half of your face is getting a different day from the other.
  • The backs of the hands. On a tray table in a sunlit row for hours, and one of the first places sun damage shows.
  • Forearms. Short sleeves plus an armrest in the sun for a transatlantic leg.
  • The walk on and off. Airstairs and apron walks at small airports are direct sun with no shade and no expectation of it.
  • The arrival afternoon. Landing at 2 p.m. somewhere sunnier than home, then sightseeing on no sleep, is the classic first-day burn.

The UV index at the destination, not at home

The CDC's peak-hours guidance, UV rays strongest "from 10 a.m. to 4 p.m. daylight saving time," is published for the continental United States. Flying is the act of invalidating that assumption. Latitude, season and altitude all change on the same day, and a January body arriving in a southern summer has no acclimatisation and no habit to fall back on. Checking the destination's UV index in a weather app before leaving the hotel is free and takes a second.

What to actually do

  • Apply before you leave for the airport. Sunscreen wants 15 minutes before exposure, and the door-to-terminal part of the day starts immediately.
  • Put one product in the quart bag, not three. The carry-on limit is 3.4 oz per container, and the rule covers creams and balms as well as liquids. The details are in travel size sunscreen and the TSA liquids rule.
  • Reapply on the same schedule you would on the ground. At least every two hours while you are in the sun, per standard sunscreen directions.
  • Use the shade if the sun is on your side. A closed window shade is the cheapest UV-A control on the aircraft, and it costs nothing to lower it for the hours the sun is on you.
  • Apply again on arrival, before the first walk. Whatever went on at 6 a.m. is not doing anything by mid-afternoon.

When a flight day genuinely does not need it

A guide that claims every flight is a UV event is not credible, so here is the other half. A red-eye with the shades down, a night flight, an aisle seat on a route with no sunlight in the cabin, and a connection spent entirely inside a terminal are not meaningful UV exposure. Sun protection on a travel day is about the daylight parts of it: the walk to the car, the apron, the layover outside, the window seat with the shade up, and the destination afternoon. That is usually enough of the day to be worth one step in the morning, which is the argument in do you need sunscreen every day.

Where Creamed® fits

Creamed® is a broad spectrum SPF 50 mineral sunscreen and moisturizer in one balm, net wt 1.7 oz / 50 mL. Non-nano zinc oxide at 20 percent is the only sunscreen active, there are no chemical UV filters, the full formula is ten ingredients, it is vegan and it is made in Los Angeles. Reef safe in the sense that matters: no oxybenzone, no octinoxate, no chemical UV filters.

For a travel day the practical point is the count. It is under the 3.4 oz carry-on limit, and because it is the moisturizer as well as the sunscreen it takes one slot in the quart bag rather than two. There is also a single-use Day Pack, which removes the container question entirely for the flight itself.

Be clear about the limits. It carries no water resistance label, so for a pool afternoon or a swim on arrival, use a sunscreen labeled water resistant for those hours and reapply after toweling off. Directions on the label: shake well, apply 15 minutes before sun exposure, and reapply at least every two hours.

Quick answers

  • Do you need sunscreen on a plane? If you are in a sunlit window seat on a daylight flight, there is UV-A exposure, because the AAD notes UVA passes through window glass and UV-A at altitude is strong. The published aircraft measurements were taken at cockpit windshields, not passenger windows, so no one can give you a number for row 24.
  • How much UV do pilots get? Sanlorenzo and colleagues measured about 242 microwatts per square centimeter of UV-A at 30,000 feet over Las Vegas, and calculated 56.6 minutes at that altitude as equivalent in UV-A carcinogenic effective radiation to a 20-minute tanning bed session.
  • Do airplane windows block UV? UV-B, almost entirely: under 1% transmission through the windshields tested. UV-A, inconsistently: from 0.41% to 53.5% in the same study, with plastic blocking more than glass.
  • Can I bring sunscreen in a carry-on? Yes, at 3.4 oz / 100 mL or less, inside the quart bag. Balms count. See the TSA liquids rule.
  • What about the airport, not the flight? That is usually the larger exposure. Cement reflects UV, per the CDC, and terminal-to-taxi time is unshaded midday sun.
  • SPF 30 or SPF 50 for travel? Both are broad spectrum if labeled so. The difference is set out in SPF 30 vs SPF 50.

Related reading

Sources

This article is general information about sun protection, not medical advice. If you have a skin concern, see a board-certified dermatologist.