Get your camera ready. Some of the best photos in the world were taken up in the air. (A window seat away from the wing is your best choice for views.)
If the food choices don't rock your boat at the terminal you fly into take the train to the Central Terminal for better food! Anthony's has seafood, beer, drinks and comfortable seating!
Alaska Airlines has efficient passenger baggage handling. Multi-check in points. Get boarding pass beforehand at free standing podiums. If checkin podium doesn't read your card ask the 'red vest' h
Oh! Flight crew gets priority... Poetic justice= when an AA stewardess cuts in front bc she's late and more important, she then gets chosen for a pat down and the person doing it is her first time!
Frequent flyer tip: Head to checkpoint 3, the one in front of the open area that includes Starbucks, etc. The line may look long, but unlike the others it actually moves.
I was at BNA, DFW, LAX, SFO, and SEA in the same week. Only Seattle had a ridiculous security line. Don't come through without having pre-check or plan for a full hour in security.
If you're coming in as a non-citizen - pray. It's too late to turn around, but Seattle is notorious for being the worst port in the US for barring people if anything seems slightly out of order.
Really fine airport facility. Security experience is much improved over the past. The dining and shopping choices are superior, compared to most airports. New rent car facility is too remote, tho.
One of the best views but unlike the domestic terminal, only limited (unhealthy) food options are available once you pass through security check. Disappointing
Make sure you add extra time if you're departure is from Gate S. It's separate from the main terminals and requires a shuttle from gate A and several escalators.