The window seat is widely considered by travellers as the best spot on the plane.
Sure, you have to clamber over your neighbours to get to the bathroom, but you also get the incredible views during take-off and landing. Plus there's the added benefit of having full control over the window shade.
But perhaps most popular is for passengers wanting to get some shuteye. However, according to flight attendants, using the wall as a headrest should be avoided at all costs.
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And the reason is pretty grim.
Cabin crew member Linda Ferguson, who worked as an airline staff member for 24 years, revealed that this is the dirtiest part of the plane.
Not only do passengers sneeze and cough onto the surface, but it also comes into regular contact with people's dirty hands and hair.
Even prior to the coronavirus pandemic, this raises all kinds of alarm bells when it comes to hygiene.
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Speaking to Reader's Digest, she said: "I see plenty of people carry Lysol wipes with them that will wipe the area around their seat.
"If there was a backlight and they could light up a plane with all the germs, I think it would petrify everybody.
"My rule of thumb, and I never get sick, is I never put my hands in my mouth or near my face."
If you land the window seat on your next flight and you're hoping to have a kip, Linda says you should clean the surface first.
The same goes for other hotspots, which you can sanitise with antibacterial spray or wipes - and be sure to wash your hands on the reg.
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One of those other hotspots includes the tray table, according to one former flight attendant, who wrote on Reddit: "If you're flying short haul, definitely bring antibac wipes or sanitiser.
"A lot of airlines will have the crew 'turnaround' the plane, meaning they pick up your rubbish, fold your seatbelt over, file your magazines in the seat pocket and then welcome new passengers.
"I have lost count of the amount of times I have had to tell people how disgusting it is to change their baby on the tray table or in a seat."
You have been warned.
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Words: Daisy Phillipson
Topics: flight, Plane, World News, travel, Health