Alaska Airlines flights from Washington, D.C. to Seattle (WAS - SEA)

• Can I get a flight from Washington, D.C. to Seattle on Alaska Airlines for under $400?

  Cheapflights users have found 50 Alaska Airlines flights for under $400 on the WAS-SEA route. Prices on flights to Seattle from Washington, D.C. can vary based on many factors including dates. To look at price based on your preferred dates, click here.

• How do most travelers feel about Alaska Airlines?

  Alaska Airlines has received a 6.2/10 rating from 4,123 Cheapflights user reviews. If you wish to plan your next trip from Washington, D.C. to Seattle with Alaska Airlines, enter your preferred travel dates above!

Currently, the most affordable month to book a Alaska Airlines flight from Washington, D.C. to Seattle in December, with an average price of $244. Conversely, traveling with Alaska Airlines from Washington, D.C. to Seattle in July will be the most expensive, with an average cost of $408. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).