$94 Cheap Flights from Washington (DCA) to Seattle (SEA)

View $94 flight on Tue, May 13, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Washington to Seattle (DCA-SEA)

Prices were available within the past 7 days and start at $94 for one-way flights and $188 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, May 7 - Sat, May 17
DCA
Washington
SEA
Seattle
$188 Roundtrip, just found
$188
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, May 7 from Washington to Seattle, returning Sat, May 17, priced at $188 just found
Frontier Airlines
Wed, May 14 - Sun, May 25
DCA
Washington
SEA
Seattle
$198 Roundtrip, just found
$198
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, May 14 from Washington to Seattle, returning Sun, May 25, priced at $198 just found
Frontier Airlines
Wed, May 7 - Wed, May 14
DCA
Washington
SEA
Seattle
$208 Roundtrip, just found
$208
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, May 7 from Washington to Seattle, returning Wed, May 14, priced at $208 just found
Frontier Airlines
Sat, May 31 - Sun, Jun 8
DCA
Washington
SEA
Seattle
$218 Roundtrip, just found
$218
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, May 31 from Washington to Seattle, returning Sun, Jun 8, priced at $218 just found
Frontier Airlines
Sat, May 31 - Sat, Jun 7
DCA
Washington
SEA
Seattle
$223 Roundtrip, just found
$223
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, May 31 from Washington to Seattle, returning Sat, Jun 7, priced at $223 just found
Frontier Airlines
Sat, May 31 - Sat, Jun 7
DCA
Washington
SEA
Seattle
$228 Roundtrip, just found
$228
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, May 31 from Washington to Seattle, returning Sat, Jun 7, priced at $228 just found
Alaska Airlines
Sat, May 31 - Sat, Jun 7
DCA
Washington
SEA
Seattle
$238 Roundtrip, just found
$238
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, May 31 from Washington to Seattle, returning Sat, Jun 7, priced at $238 just found
United
Wed, May 14 - Sat, May 17
DCA
Washington
SEA
Seattle
$251 Roundtrip, found 6 hours ago
$251
Roundtrip
found 6 hours ago
Select United flight, departing Wed, May 14 from Washington to Seattle, returning Sat, May 17, priced at $251 found 6 hours ago
Delta
Wed, May 14 - Sat, May 24
DCA
Washington
SEA
Seattle
$257 Roundtrip, found 1 hour ago
$257
Roundtrip
found 1 hour ago
Select Delta flight, departing Wed, May 14 from Washington to Seattle, returning Sat, May 24, priced at $257 found 1 hour ago
American Airlines
Sat, Jun 7 - Sat, Jun 14
DCA
Washington
SEA
Seattle
$277 Roundtrip, found 3 hours ago
$277
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Sat, Jun 7 from Washington to Seattle, returning Sat, Jun 14, priced at $277 found 3 hours ago
Flights from Washington (DCA) to Seattle (SEA)
Origin airport
Ronald Reagan Washington National
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$188
Distance
2322 mi

Washington to Seattle Flights

The cheapest times to fly from Washington to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Seattle are during the month of May. You can find some of the cheapest flights from Washington to Seattle with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Washington to Seattle

Sunday is one of the best days to book for cheap flights from Washington to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Washington to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $94 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA) cost?
You’ll find cheap return fares from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA) starting from $287. Snag a seat and set off on your next adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving DCA on May 13 2025 and touching down at SEA. The price was last updated on April 22 2025 and has not changed since.
What is the cheapest month to fly from DCA to SEA?
The cheapest flights from DCA to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
When departing from Ronald Reagan Washington National Airport (DCA), you can hop on a nonstop flight to Seattle - Tacoma Intl. Airport (SEA) with Alaska Airlines.
What is the cheapest airline that flies from DCA to SEA?
Travel from DCA to SEA with Delta. This carrier currently offers the lowest one-way fare for this route, starting at $144. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from DCA on May 13 2025. Prices were last updated on April 22 2025 and have not changed since.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
With an average of 2 nonstop flights departing from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA) daily, you’ll be up in the air in no time.
What are the most popular departure times for flights from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
The 8 AM departures from DCA to SEA are typically the busiest. Greater demand means you’ll likely pay more for these departures. If you want to save on your trip, book during off-peak hours.
What day of the week has the most flights from DCA to SEA?
If you depart on a Friday, you’ll get the biggest range of choices for flights from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA).
What is the earliest flight from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
Ronald Reagan Washington National Airport (DCA)’s first flight to Seattle - Tacoma Intl. Airport (SEA) departs at approximately 8:00AM UTC-5. With a flight time of 6h 4m, you’ll arrive at around 11:04AM UTC-8.
How long does it take to fly from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
Typically, it takes 6 hours and 4 minutes to cover the 2,300 mi from DCA to SEA.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
Select a flight from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Seattle from Ronald Reagan Washington National Airport (DCA)?
Seattle - Tacoma Intl. Airport (SEA) is the only airport in Seattle with direct flights from Ronald Reagan Washington National Airport (DCA). Check out the available options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until right before your break to book your flight from DCA to SEA generally means paying more. While it’s possible to find some last-minute discounts, they’re not always guaranteed. Be flexible with your itinerary to maximize your chances of scoring a bargain.
Is it cheaper to book a DCA to SEA flight and hotel package?
You’ll typically save money by securing a DCA to SEA flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it’s easy to manage everything in one place. After choosing your ideal accommodations and flights, consider adding extras including tours, activities and car rentals.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
Generally, it’s possible to reschedule or cancel your DCA to SEA flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline’s policies in your itinerary to see what changes are possible and whether any costs are involved. You’ll also find more information on our Customer Service portal.

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*Available to One Key members.