$111 Cheap Flights from Washington (DCA) to Seattle (SEA)

You can find cheap one-way flights from $111 and cheap return flights from $160 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) with Expedia. One-way flights typically cost between $143 and $1255, and return flights often range between $352 and $2585. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.

January is the cheapest month to fly from Washington, DC (DCA) to Seattle, WA (SEA), with average return fares around $352. This price is about 23% lower than the average throughout the year, as January typically sees a decline in travel demand after the holiday season. Other affordable months to consider are February and September.*Averages based on flights available on Expedia in the last year.

3 airlines operate nonstop service from DCA to SEA:

• Delta operates around 10 direct flights from DCA to SEA every week
• Hawaiian Airlines operates around 9 direct flights from DCA to SEA every week
• Japan Airlines operates around 7 direct flights from DCA to SEA every week

Delta is one of the cheapest airlines offering nonstop flights from Washington, DC (DCA) to Seattle (SEA), with round-trip tickets starting from around $406. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.

The best times to fly from Washington, DC (DCA) to Seattle, WA (SEA) are typically January and September. In January, you can find return flights for around $352, making it a budget-friendly option after the holiday rush. September also offers great value with similar pricing, and the weather is generally pleasant, making it a lovely time to visit Seattle.*Prices based on flights available on Expedia in the last year.

You can fly first class between DCA and SEA. First class cabins are available on:

• Delta Air Lines
• American Airlines
• United Airlines

A direct, return business class ticket from Washington, DC (DCA) to Seattle, WA (SEA) typically costs between $1,492 - $2,396. A non-stop, one-way business class flight is usually around $479 - $1,004. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.

It's easy to earn miles on a Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.