3. You can check in your carry-on for free
If the plane is very full, the agents at the desk will check in your carry-on so you won’t have to lug it around on a crowded plane. This is done for free, so you won’t have to worry about any extra charges. Just carry it to the gangway and leave it there and a handler will put into the baggage compartment. You won’t even have to worry about leaving your carry-on in the plane. This hack will completely change your flying experience.