Really, SeaTac airport is not the area in which one finds nice, unique hotels. For that, you really need to go downtown. Downtown is not that far from the airport—only about 14 miles and 14 minutes by car. The Inn at the Market is very nice (so you can experience the Pike Place Market area), or you can fish out your window at the Edgewater Inn, immortalized in Frank Zappa’s song Mudshark.