Following is a excerpt from the Port of Seattle
Q. How do I get from Sea-Tac Airport to the Bell Street Pier Cruise Terminal?
A. It takes about 30 minutes to get to the cruise terminal from Sea-Tac Airport. Taxi fares can range from $25 - $40 from the Airport to downtown.
You can obtain additional information from that site.
Mary Lou Scanlon
NCL Pride of America April 24, 2010
NCL Epic February 12, 2011
RCCL Allure of the Seas - September 18, 2011
Celebrity Eclipse - February 11, 2012:
RCCL Navigator OTS - February 9, 2013