Originally Posted by points_maniac

I recently was on a 757 from ORD to SFO that had lie-flat seats. I was told it was a pmCO plane. Are these planes used on a regular basis for ORD-SFO flights?

I have been trying to book a new flight from ORD to SFO, but the only flights on 757s seem to be the pmUA planes, so I was wondering if I just got lucky and this was a one-off event.