Originally Posted by mallthus
The only *A exception is JFK-SFO and JFK-LAX "ps" flights on UA, which have a three class cabin with E+, C & F. I believe the F seats are the only domestic fully flat sleepers in the USA.
The seats for the ps flights in F are comparable to SQ's C class seats.
There are a few domestic flights for hub-hub routes that offer 3 classes of seats comparable to international seats. The schedule changes perodically, but often you can find them on SFO-ORD, ORD-IAD, IAD-LAX, etc