However on commercial airlines the air is usually pressurised to 1,830 - 2,400 meters. The air on a plane is akin to the air on the top of a small mountain, thin and dry. The air on the international space station is better than the air on an airplane.
Source : Ask an Astronaut by Tim Peake, ISBN : 978 -1 - 784 - 75948 - 3
