Airport: SeaTac (Seattle-Tacoma)

Transport: The airport has a light-rail station attached to it. This can easily be taken in order to get up to Seattle proper (it can not get you to the Fremont neighborhood directly). For instance, you could take the light rail from the Sea-Tac airport to the University of Washington station and then get an Uber or Taxi to Fremont. Otherwise, the area has ample Ubers, Lyfts and rental car options.