Hmm. Actually some encouraging news here atleast for PS flight.

Doing a dummy booking inquiry for SFO-JFK's tomorrow. Looking at the #'s for example UA760 tomorrow morning..

F8 ON8 O8
J3 R2 RN2

From the looks of this, it looks like "ON" is corresponding with F availability and R/RN with J. By the way, does anyone know the difference between R and RN? O and ON?