Alaska offers direct flights to Seattle from 95 cities. The most frequent departures are: Anchorage, Portland, Spokane, Los Angeles and Boise.

Delta offers direct flights to Seattle from 56 cities. The most frequent departures are: Spokane, Portland, Atlanta, Boise and Salt Lake City.

Southwest offers direct flights to Seattle from 13 cities. The most frequent departures are: Denver, Oakland, Sacramento, Las Vegas and San Jose.

Frontier offers direct flights to Seattle from 7 cities. The most frequent departures are: Denver, Ontario, Phoenix, Las Vegas and Los Angeles.

United offers direct flights to Seattle from 7 cities. The most frequent departures are: San Francisco, Denver, Chicago, Houston and Newark.

American offers direct flights to Seattle from 7 cities. The most frequent departures are: Dallas, Chicago, Charlotte, Phoenix and Philadelphia.