Originally Posted by
aces219
Are you checking bags? If so, they won't let you standby because of the codeshare since they won't ask the other airline to pull your bags in advance so they can put them on your earlier AS flight.
Theoretically, instead of rechecking your bags at TBIT, you could schlep them over to Terminal 3 (not that far of a walk) and see about getting on the 1:30 flight to SEA.