The Red Lion at SeaTac offers a great park and fly experience. Right next to the airport, great service, beautiful rooms, wifi. Drop your car off at MasterPark at the hotel just before you fly. Its waiting for you when you return. We stayed the night before we flew, were gone two weeks, came back after the typical airport experiences. Our car was waiting for us. We got in, drove off. Couldn't be better.
Phoebe

We stayed at the Red Lion on our way to and home from Costa Rica. The room was perfect. Beds were comfortable and the airport shuttle service was great. It runs 24/7 and the hotel is only about 5 min from the airport. We left our car for 2 weeks and when we went to leave the battery was dead. They had a portable booster and we were on our way in no time. The restaraunt next door is very good and gives you a discount on the breakfast buffet. Would definately stay here again.

We stayed here in January 2012 with our two kids the night before a flight to Denver. Other travellers on this site had recommended it and it certainly lived up to its reviews. The rooms are very large which is helpful with more than 2 people in the room. We requested a disabled/accessible room so we could fit our baby's pack n'play in the bathroom....these rooms are on every floor and can serve as an extra bedroom for little ones if you are desperate for some sleep. The beds were good - not too soft and the linens were ok. The room was clean and the shuttle service to the airport was every 5 minutes. We parked for a week for $140, including the night's stay. It was just what we were looking for!

Perfect for a quick overnight stay at the SEA airport. Rooms were much nicer than I expected. Front desk was friendly. Even though it is close enough to walk to the SEA airport, the shuttle runs so often, it was a breeze (even at 4:30a!).
I travel to SEA often, and now have a new place to stay at the airport!