Originally Posted by
bigbirdwithsilverwings
Understood, but BA will not check luggage through if I have purchased one ticket from BA and another from Alaska despite me needing both to get to PDX where BA doesn't fly...sigh.
Um, due to said codesharing agreement, you can buy a PDX-LHR round trip on a single ticket from BA, so... why not just do that?
And yes, SEA can get crowded, especially at immigration, which is why the new international arrivals facility is under construction.