Cheap Alaska Airlines flights Seattle (SEA) to Washington (DCA)

Landing cheap one-way Alaska Airlines flights from SEA to DCA on Expedia is a cinch — just filter by “Price (lowest to highest).” Alternatively, check out our affordable return fares from $242 for your next adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the cheapest months to travel to Washington with Alaska Airlines. You could also find great prices on one-way and round-trip tickets in February.

For cheap Alaska Airlines fares from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the cost. Sunday is typically the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Yes, you can travel from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) on one of Alaska Airlines’s 14 weekly direct flights. Use our “Nonstop” and “Airline” filters to find the Alaska Airlines flight that’ll arrive at DCA at a time that suits you.

Leave Seattle - Tacoma Intl. Airport (SEA) for Ronald Reagan Washington National Airport (DCA) on a direct Alaska Airlines flight, and you’ll be airborne for around 4h 59m.

Alaska Airlines has the most flights from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) on Thursday. With up to 2 daily departures, you’ll get the most flexibility on this day.

The first flight from SEA to DCA with Alaska Airlines departs at 8:24AM UTC-8. You’ll land at 4:29PM UTC-5. The last Alaska Airlines flight of the day takes off at 2:05PM UTC-8 and arrives at 9:59PM UTC-5. With around 20% fewer cancellations for early and mid-morning flights, beginning your travel day early is usually the smartest option.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

When heading from Seattle - Tacoma Intl. Airport (SEA) to Washington with Alaska Airlines, you’ll probably touch down at Ronald Reagan Washington National Airport (DCA). This is the airline’s main gateway to the city. Other nearby airports like Washington Dulles Intl. Airport (IAD) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI) may offer more affordable fares, so it’s a smart idea to check out all options on Expedia.

Heading from SEA to DCA with Alaska Airlines comes with plenty of perks, such as an excellent in-flight experience and top-tier customer service. Plus, when booking through Expedia, One Key™ members can collect OneKeyCash™* to use on select future travel purchases. That’s on top of the Mileage Plan points you can earn with Alaska Airlines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Catch an Alaska Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA), and you’ll likely be seated on a Boeing 737-800. Bear in mind though, that the aircraft type can change due to operational needs.

You can usually cancel or change your flight, although there may be additional fees if your booking was made over 24 hours ago. Need to keep your options open? Use Expedia’s “No cancel fee” or “Changes included” filter to find flights that won’t charge you extra if you have to adjust your plans. To modify your booking, go to “Trips,” select your flight and click on “Manage Booking” for further information.