They can't just change things up on a dime like that. Even if it's 3 AM and most planes are sitting on the ground they can't just be used for your flight like

They can't just change things up on a dime like that. Even if it's 3 AM and most planes are sitting on the ground they can't just be used for your flight like that because they are all scheduled to take off in the morning rush a few hours later.