You are only allowed to be scheduled for 8 hours of flying in a day. Fly from New York to Los Angeles in 6 hours. Now you have to stay, the flight back is 5 hours. 11 is more than 8. I fly 8 hour international legs. You get a 24 hour layover while you wait for your plane to get back. I sleep, eat, workout, and see the local sights. A paid vacation.