$139 Cheap Flights from Seattle (SEA) to Washington (DCA)

View $139 flight on Wed, Nov 19, 2025Opens in a new window

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

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Cheap Flights from Seattle to Washington (SEA-DCA)

Prices were available within the past 7 days and start at $139 for one-way flights and $227 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Sep 5 - Fri, Sep 5
SEA
Seattle
DCA
Washington
$227 Roundtrip, found 4 days ago
$227
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Sep 5 from Seattle to Washington, returning Fri, Sep 5, priced at $227 found 4 days ago
Bargain Flight
Tue, Nov 4 - Wed, Nov 12
SEA
Seattle
DCA
Washington
$273 Roundtrip, found 5 hours ago
$273
Roundtrip
found 5 hours ago
Select Bargain Flight flight, departing Tue, Nov 4 from Seattle to Washington, returning Wed, Nov 12, priced at $273 found 5 hours ago
Southwest Airlines
Tue, Nov 11 - Wed, Nov 19
SEA
Seattle
DCA
Washington
$277 Roundtrip, found 5 hours ago
$277
Roundtrip
found 5 hours ago
Select Southwest Airlines flight, departing Tue, Nov 11 from Seattle to Washington, returning Wed, Nov 19, priced at $277 found 5 hours ago
Hawaiian Airlines
Tue, Nov 25 - Thu, Nov 27
SEA
Seattle
DCA
Washington
$277 Roundtrip, found 3 days ago
$277
Roundtrip
found 3 days ago
Select Hawaiian Airlines flight, departing Tue, Nov 25 from Seattle to Washington, returning Thu, Nov 27, priced at $277 found 3 days ago
Bargain Flight
Fri, Oct 31 - Sat, Nov 1
SEA
Seattle
DCA
Washington
$283 Roundtrip, found 20 hours ago
$283
Roundtrip
found 20 hours ago
Select Bargain Flight flight, departing Fri, Oct 31 from Seattle to Washington, returning Sat, Nov 1, priced at $283 found 20 hours ago
Southwest Airlines
Tue, Nov 4 - Fri, Nov 14
SEA
Seattle
DCA
Washington
$287 Roundtrip, just found
$287
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, Nov 4 from Seattle to Washington, returning Fri, Nov 14, priced at $287 just found
United
Fri, Oct 31 - Sat, Nov 1
SEA
Seattle
DCA
Washington
$287 Roundtrip, found 20 hours ago
$287
Roundtrip
found 20 hours ago
Select United flight, departing Fri, Oct 31 from Seattle to Washington, returning Sat, Nov 1, priced at $287 found 20 hours ago
Alaska Airlines
Tue, Nov 18 - Tue, Nov 18
SEA
Seattle
DCA
Washington
$291 Roundtrip, found 1 day ago
$291
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Nov 18 from Seattle to Washington, returning Tue, Nov 18, priced at $291 found 1 day ago
United
Fri, Oct 31 - Sat, Nov 1
SEA
Seattle
DCA
Washington
$291 Roundtrip, found 20 hours ago
$291
Roundtrip
found 20 hours ago
Select United flight, departing Fri, Oct 31 from Seattle to Washington, returning Sat, Nov 1, priced at $291 found 20 hours ago
Southwest Airlines
Tue, Nov 11 - Wed, Nov 19
SEA
Seattle
DCA
Washington
$292 Roundtrip, found 5 hours ago
$292
Roundtrip
found 5 hours ago
Select Southwest Airlines flight, departing Tue, Nov 11 from Seattle to Washington, returning Wed, Nov 19, priced at $292 found 5 hours ago

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

September is typically the cheapest month to fly

From $138 - $293 per traveler.

Graph displaying average flight prices per month

Alternative airports near Washington

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

Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Cheapest option available. Average driving time to city center is 40 minutes. Flights from $424
BWI
Baltimore Washington Intl. Thurgood Marshall
Cheapest
Average driving time to city center40 min
Flights from $424
0
Flights from Seattle (SEA) to Washington (DCA)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Ronald Reagan Washington National
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$226
Distance
2322 mi

Seattle to Washington Flights

The cheapest times to fly from Seattle to Washington

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 Seattle to Washington are during the month of September. You can find some of the cheapest flights from Seattle to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Washington

Sunday is one of the best days to book for cheap flights from Seattle to Washington: 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 Seattle to Washington

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 Seattle to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $139 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 Seattle to Washington 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 Seattle to Washington 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 Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) cost?
Lock in a cheap one-way flight from $139 or cheap return flight from $227 from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Flying in September may help you find better deals, as it's the cheapest month for flights between SEA and DCA. You'll typically find the lowest fares during the off-season.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
When departing from Seattle - Tacoma Intl. Airport (SEA), you can board a direct flight to Ronald Reagan Washington National Airport (DCA) with Alaska Airlines.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from SEA to DCA. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
With, on average, 2 direct flights departing from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) each day, you'll be cruising above the clouds before you know it.
What are the most popular departure times for flights from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Flights between SEA and DCA are their busiest at 8 AM. If you're after a quieter trip and potentially cheaper prices, look for a time when demand is lower.
What day of the week has the most flights from SEA to DCA?
Friday has the most flights from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA). Consider traveling on this day and you'll have the best chance of finding a departure that fits your plans.
What is the earliest flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Seattle - Tacoma Intl. Airport (SEA)'s earliest flight to Ronald Reagan Washington National Airport (DCA) is at approximately 8:24AM UTC-8. With a travel time of 5h 5m, you'll touch down at around 4:29PM UTC-5.
How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
The average flight time from SEA to DCA is 4 hours and 59 minutes, covering a total distance of 2,300 mi.
What airline has the least delays from SEA to DCA?
With 86% of journeys generally landing on time, Alaska Airlines has the best on-time performance for direct flights from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA). To monitor your flight status and get notifications about any changes, use the Expedia App.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
To reach Ronald Reagan Washington National Airport (DCA) on schedule, book a flight that leaves from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Washington from Seattle - Tacoma Intl. Airport (SEA)?
Take a direct flight from Seattle - Tacoma Intl. Airport (SEA) to Washington and arrive at one of these airports:

  • Ronald Reagan Washington National Airport (DCA)
  • Washington Dulles Intl. Airport (IAD)
  • Baltimore Washington Intl. Thurgood Marshall Airport (BWI)

Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) last-minute?
Waiting until right before your break to book your flight from SEA to DCA generally means paying more. While you may come across some last-minute offers, they're not always guaranteed. Keep your travel schedule open to boost your chances of landing a bargain.
Is it cheaper to book a SEA to DCA flight and hotel package?
You can save money by booking a SEA to DCA flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After choosing your preferred accommodations and flights, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
If you booked your SEA to DCA flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

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