Originally Posted by
undersky
Do we also get 4~6 hours of pre-boarding too?
Actually that is not a bad idea. You are going to take a red-eye to, say, SFO from JFK. You get on the plane at 7pm, have dinner and a movie, seat belt on, lie flat, and go to sleep. Plane takes off sometime during the night, you wake up at SFO at 6am, ready to go to work.
I'm not a doctor, but I did sleep in a Westin F-class seat on a p.s. flight last night.