Can the Doors be Opened During a Flight?
The doors are shut throughout the flight, as they are when a plane is in the air. This also applies to emergency exits. The doors are closed and can’t be opened until the aircraft touches down.
The pressure is so excessive that even if you attempt to open the door, it will be impossible to do so. The air keeps the door firmly shut; no button or mechanism on earth can unlock it until the plane reaches a lower altitude or touches down.