What time of year? Will you check luggage? BA boards earlier so could, maybe close the door earlier as well. Is it just you in your party? Is there space on the later BA flight? Buy lounge privileges for the day. There are really good lounges all over SEA for AS folks. Go on a tasting tour! If your YYV flt is even 10" late to gate and folks in front of you are slow.........you might be hanging out in Seattle a lot longer. I do ANC to LHR pretty frequently and wouldn't book less that 90" in the summer or 2 hrs in winter. Hey, as others say, dump the junk and head into town for a nice meal. Must say for great NE clam chowder, I like Ivar's just fine but I truly love the one the chef makes at what is now Sky Bridge, used to be Crowne Plaza....you can walk there in 15 mins. Have a great trip!