Open the flights menu (plane icon in the bottom toolbar) to see a list of destinations you can fly to. You can also send an aircraft on a flight from the Operative Hangar by selecting the plane in the "Stands" section and tapping the " Start a flight" button. Each flight requires a specific type of aircraft, a different number of passengers (suitcase icon) and fuel (barrel icon). Some flights also require additional items. If you have the right plane, all the necessary items, enough passengers and fuel, press the button with the plane next to your destination. Your aircraft will automatically begin flight preparations. Have a nice flight and soft landing!