Below is a list of Seatac WA zip codes. For your research we have also included Seatac Area Code, Time Zone, UTC and the local King County FIPS Code. Each Seatac Washington zip code has a center Longitude / Latitude point (the Seatac center is -122.26899719238 / 47.44580078125). For your convenience we have also indicated if that zip code in Seatac observes Daylight Savings time.