A few years ago, for the military, I flew a 10 hr leg to Buenos Aires from the East coast. 1100L departure landed around 2100L, got some nice steak/wine, slept 10 hrs, left at 1200L the next day, in my bed at midnight. Only paid 2 military days plus per diem but that would have been the ultimate 777 trip at $200/hr. Didn't hurt at all. When I fly to Europe now, it just hurts all over for 3 days...getting old sucks.