Requirements: (1) Must be able to earn AS or UA EQMs. This means the entire *A and DL, AA, AF, KL Preferences: (2) Prefer (but not required) that the first point of entry to the US on the return is SFO (eliminating any domestic carrier). (3) A lie flat (180 degree, not the slip and slide "flat") is desired on the overwater segments. (4) Decent food and drink wouldn't hurt. (5) An airline that isn't going to give issues with the standard "fine in the USA" rollerbag carry-on. I've never flown AA/DL/AF/KL longhaul (nor AF or KL at all). I also wonder if the front cabin of a 2 cabin plane is going to be better than the mid cabin of a 3 cabin (such as AF, UA, AA, LH). As much as I was recently pleased with the LH inflight soft product in C, the slanted seats were horrible. And I haven't been to CDG for ages, back when UA had a nonstop, and when UA was an airline one actually looked forward to flying. Comments welcome with the + and -.