I doubt it's a glitch. They shift these aircraft around from time to time and probably feel they don't need one of them on the ps route during that period.
Originally Posted by
haddon90
BOS does not have the $ to support the p.s. fares that JFK-LAX/SFO command. hence why p.s. is only on the NY-california markets.
ps fares are quite low right now, around $2200 RT. They've been even lower (in the $1200 range) recently. Given the competitive landscape, with AA, DL, and B6 all competing for the same pax, this could continue for a while.