Usually, when the cabin is pressurized, the exit row doors can't be opened.
People Also Ask
Spoiler: It's not easy. In a shocking incident reminiscent of a nightmare, a passenger in South Korea opened the emergency door of an aircraft that was minutes from landing. The Asiana Airlines plane was flying from Jeju Island to Daegu when the door opened about 2,300 feet above ground.
Opening an airplane door during a flight is incredibly difficult, and quite literally impossible. Airplane doors are designed to be opened by cabin crew only, and will only open while the airplane is on the ground. This is due to the pressure difference between the inside and outside of the airplane.
The program is conducted by specially trained undercover armed RCMP officers (known as aircraft protective officers – APOs) on selected domestic and international flights and all flights to Ronald Reagan Washington National Airport, in the United States.
Basically, the air pressure inside the cabin is higher than it is outside of the plane to enable the people onboard to breathe normally. That's why, if a window happens to break, the air inside would escape at high speeds, taking small objects like phones or magazines (or sometimes larger things, like people) with it.
When the aircraft is not pressurized, either on the ground or if depressurized during the flight (intentionally or due to an accident), then pilots can open them. On most modern aircraft, the opening procedure is the same. The window is unlatched, and it then slides inwards into the cockpit and opens to the side.
The cockpit door automatically locks, but a keypad outside allows a flight attendant to insert a security code to gain access. A buzzer sounds, and the pilots must switch the door control inside the cockpit to “unlock” to release the door after verifying the crew member through a peephole or video surveillance.
After all, even the most capable passenger can be incapacitated by one drink too many, which could put lives at risk. They also note that it's unwise to sleep in the emergency exit row. Because, well, it's the emergency exit row. Another unwritten no-no: XL fliers.