$123 Cheap Flights from Washington (DCA) to Seattle (SEA)

View $123 flight on Mon, Aug 24, 2026Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Washington to Seattle (DCA-SEA)

Prices were available within the past 7 days and start at $123 for one-way flights and $246 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Aug 12 - Wed, Aug 19
DCA
Washington
SEA
Seattle
$246 Roundtrip, just found
$246
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Aug 12 from Washington to Seattle, returning Wed, Aug 19, priced at $246 just found
Frontier Airlines
Sun, Sep 6 - Sat, Sep 12
DCA
Washington
SEA
Seattle
$256 Roundtrip, found 2 hours ago
$256
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sun, Sep 6 from Washington to Seattle, returning Sat, Sep 12, priced at $256 found 2 hours ago
Frontier Airlines
Sun, Sep 6 - Tue, Sep 15
DCA
Washington
SEA
Seattle
$265 Roundtrip, just found
$265
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, Sep 6 from Washington to Seattle, returning Tue, Sep 15, priced at $265 just found
Frontier Airlines
Sat, Sep 19 - Mon, Sep 21
DCA
Washington
SEA
Seattle
$266 Roundtrip, found 5 hours ago
$266
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Sat, Sep 19 from Washington to Seattle, returning Mon, Sep 21, priced at $266 found 5 hours ago
Southwest Airlines
Wed, Aug 12 - Wed, Aug 19
DCA
Washington
SEA
Seattle
$266 Roundtrip, just found
$266
Roundtrip
just found
Select Southwest Airlines flight, departing Wed, Aug 12 from Washington to Seattle, returning Wed, Aug 19, priced at $266 just found
JetBlue Airways
Tue, Aug 18 - Tue, Aug 18
DCA
Washington
SEA
Seattle
$269 Roundtrip, found 5 days ago
$269
Roundtrip
found 5 days ago
Select JetBlue Airways flight, departing Tue, Aug 18 from Washington to Seattle, returning Tue, Aug 18, priced at $269 found 5 days ago
JetBlue Airways
Wed, Sep 23 - Mon, Sep 28
DCA
Washington
SEA
Seattle
$270 Roundtrip, just found
$270
Roundtrip
just found
Select JetBlue Airways flight, departing Wed, Sep 23 from Washington to Seattle, returning Mon, Sep 28, priced at $270 just found
American Airlines
Sun, Sep 6 - Sat, Sep 12
DCA
Washington
SEA
Seattle
$271 Roundtrip, found 2 hours ago
$271
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sun, Sep 6 from Washington to Seattle, returning Sat, Sep 12, priced at $271 found 2 hours ago
Southwest Airlines
Tue, Aug 11 - Tue, Aug 18
DCA
Washington
SEA
Seattle
$275 Roundtrip, just found
$275
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, Aug 11 from Washington to Seattle, returning Tue, Aug 18, priced at $275 just found
United
Wed, Aug 19 - Wed, Aug 26
DCA
Washington
SEA
Seattle
$275 Roundtrip, just found
$275
Roundtrip
just found
Select United flight, departing Wed, Aug 19 from Washington to Seattle, returning Wed, Aug 26, priced at $275 just found

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $516
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $516

Find the cheapest month to fly from Washington (DCA) to Seattle (SEA)

August is typically the cheapest month to fly

From $230 - $389 per traveler.

Frequently asked questions

How much does a flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from $123 and cheap return flights from $246 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.
What is the cheapest month to fly from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
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.
Which airlines fly direct from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
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

What is the cheapest airline that flies from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
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.
How do I find cheap flights from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Washington, DC (DCA) to Seattle, WA (SEA) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Delta typically offers the lowest fares. American Airlines offers the most daily flights from DCA to SEA, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
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.
How many flights per day from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
On average, there are around 1 nonstop flights per day from Ronald Reagan Washington National (DCA) to Seattle - Tacoma Intl. (SEA). For more options, look at flights that include layovers.
What is the earliest flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Ronald Reagan Washington National Airport (DCA) to Seattle-Tacoma International Airport (SEA) usually departs at around 5:00 AM, operated by American Airlines. An early start like this can help you maximize your time in Seattle. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Washington, DC (DCA) to Seattle, WA (SEA) are in the early morning, from 6am to 9am. About 34% of passengers prefer this time window. Many major carriers, including American Airlines, Delta Air Lines, and Alaska Airlines, offer flights during this period. This timing works well because it allows you to arrive in Seattle with a full day ahead of you.
How long does it take to fly from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A nonstop flight from DCA to SEA typically takes around 6 hours, covering approximately 2,323 miles. Connecting flights on this route usually add 4 hours to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can fly first class between DCA and SEA. First class cabins are available on:

  • Delta Air Lines
  • American Airlines
  • United Airlines

How much is a business class flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
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.
How do I earn miles on a Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
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.
What airports do you fly into for Seattle from Ronald Reagan Washington National (DCA)?
If you're planning to travel to Seattle from Ronald Reagan Washington National (DCA), you can fly into Seattle - Tacoma Intl. (SEA) Some flights may connect through major hubs like O'Hare Intl. (ORD), Kansas City Intl. (MCI), Love Field (DAL) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) Seattle Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

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
$246
Distance
2322 mi
Average flight time
2 hours 57 mins

Book with confidence

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 August. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $123 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.

 

Washington to Seattle Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

How to find the latest flight deals from Washington (DCA) to Seattle (SEA)?

Last updated:

This page highlights the latest flight deals from Washington to Seattle (DCA to SEA), including one-way and roundtrip options from multiple airlines. The deals featured here are updated regularly, so you’ll always find the most up-to-date prices and best available flights for your trip from Washington to Seattle.

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