I just overheard in the UC one of the agents telling that UA will be moving all the operations at SEA over to the A gates on or about May 8th including a brand new club. All check in counters will also move to the south end of the airport. She said it will all be done in one night (the transition) and that they have a large crew coming in that day to do everything overnight.
If this is true it sounds like a great upgrade for SEA!
If this is true it sounds like a great upgrade for SEA!