[rjsw]

Airplanes are not pressurized to sea level though, water boils at lower temperatures at altitude.

[spiznnx]

On airplanes, pressure is equivalent to about 2000m ASL, at which water boils at 93.4 °C

[rjsw]

There are several ski resorts at 2000m, you notice the difference in coffee temperature from sea level.