Wiktionary
flight mode
n. (context communication English) A feature included in some electronic devices that deactivates the device's radio transmitters and receivers. It mostly applies to cell phones, but it is applicable to any electronic device that transmits radio signals as its primary function.
Usage examples of "flight mode".
As they fought off gravity, they started sliding forward, quickly gaining speed and altitude as they tran-sitioned from take-off configuration into full flight mode.
The droid starfighters were all in flight mode, with their wings retracted to maintain a sleek profile.
A third of the speeder's cockpit controls went dark, while a bright orange legend across the bottom of the viewshield warned FLIGHT MODE.