Originally Posted by
PDXPremier
I added a GGU to a SAN-ORD (AA) ORD-SEA (AS) itinerary online before so my guess is a definite maybe....
How did you select the fare bucket? Upgrade option is greyed out as unavailable when I attempted to book HA + AS online:
Upgradeable fare is shown on all AS itinerary, even when upgrade is not currently available