[e44858]

Some planes can land automatically without the pilot's input: https://avbrief.com/autoland-saves-king-air-everyone-reporte...

Takeoff is probably easier to automate than an emergency landing.

[altairprime]

Notably, I believe the Cessna stall parachute in certain planes is autonomous by most definitions, not the least of which because it fires without pilot input and because it takes control of the plane away from the human to do so. I recognize this is a rather, uh, odd use of ‘autonomous’ — but it does technically serve as a pilotless emergency landing mechanism :)