5/05/2015 · For any airplane to fly, one must lift the weight of the airplane itself, the fuel, the passengers, and the cargo. The wings generate most of the lift to hold the plane in the air. To generate lift, the airplane must be pushed through the air.
The check-in process at airports enables passengers to confirm they will be on the respective flight, obtain a boarding pass, possibly select their seat (if hasn’t happened already or allowed by airline), and check in luggage onto a plane, if desired.