GTA San Andreas Controls for PC, Xbox & PS4 Definitive Edition
GTA 5: Controls, Xbox 360 | gamepressure.com
Flight Controls - Battlefield 3 Wiki Guide - IGN
Changing helicopter controls to easy way on keyboard in GTA - YouTube
How To Fly Planes In GTA 5: Learn How To Fly & Conquer The Sky In GTA 5
After a few hours of testing, these are the controls I found most useful for flying. The plane can be controlled by just your left hand, precise movements are for the mouse.
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Far Cry 5 Controls List - Keyboard Commands & Button Configuration