They barely ever do. Only when landing to an airport at sea level.
Upon take off, the cabin pressure is gradually increased until the regulatory 8000 ft, which is maintained majority of the flight.
You experience the same pressure changes while driving in the mountains, with the good ol’ ear popping.
What planes are you flying on that aren’t pressurized?
Planes don’t maintain sea-level atmospheric pressure the whole time. That’s why your ears pop in-flight.
They barely ever do. Only when landing to an airport at sea level. Upon take off, the cabin pressure is gradually increased until the regulatory 8000 ft, which is maintained majority of the flight.
You experience the same pressure changes while driving in the mountains, with the good ol’ ear popping.