$149 Cheap Delta flights Seattle (SEA) to Washington (DCA)

View $149 flight on Thu, Aug 14, 2025Opens in a new window

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$149 Cheap Delta flights Seattle (SEA) to Washington (DCA)

Prices were available within the past 7 days and start at $149 for one-way flights and $277 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Oct 4 - Tue, Oct 7
SEA
Seattle
DCA
Washington
$277 Roundtrip, found 1 hour ago
$277
Roundtrip
found 1 hour ago
Select Delta flight, departing Sat, Oct 4 from Seattle to Washington, returning Tue, Oct 7, priced at $277 found 1 hour ago
Delta
Thu, Aug 14 - Tue, Aug 19
SEA
Seattle
DCA
Washington
$287 Roundtrip, just found
$287
Roundtrip
just found
Select Delta flight, departing Thu, Aug 14 from Seattle to Washington, returning Tue, Aug 19, priced at $287 just found
Delta
Thu, Aug 14 - Mon, Aug 18
SEA
Seattle
DCA
Washington
$303 Roundtrip, found 7 hours ago
$303
Roundtrip
found 7 hours ago
Select Delta flight, departing Thu, Aug 14 from Seattle to Washington, returning Mon, Aug 18, priced at $303 found 7 hours ago
Delta
Sat, Aug 30 - Tue, Sep 2
SEA
Seattle
DCA
Washington
$309 Roundtrip, found 1 hour ago
$309
Roundtrip
found 1 hour ago
Select Delta flight, departing Sat, Aug 30 from Seattle to Washington, returning Tue, Sep 2, priced at $309 found 1 hour ago
Delta
Sat, Aug 30 - Mon, Sep 1
SEA
Seattle
DCA
Washington
$319 Roundtrip, found 3 hours ago
$319
Roundtrip
found 3 hours ago
Select Delta flight, departing Sat, Aug 30 from Seattle to Washington, returning Mon, Sep 1, priced at $319 found 3 hours ago
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
Popular airline
Alaska Airlines
Distance
2322 mi
Average flight time
8 hours 6 mins

Frequently asked questions

How much is a Delta Air Lines flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Scoring cheap one-way Delta Air Lines flights from SEA to DCA from $149 on Expedia is simple --- just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from $277 for your next break.**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.
What is the cheapest month to fly from SEA to DCA with Delta Air Lines?
Search for round-trip or one-way flights to Washington in January or February. You could find cheaper fares with Delta Air Lines during these off-season months.
What is the cheapest time to book flights from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) with Delta Air Lines?
Look for cheap Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) one to three months before your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and journey, the best day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.
Does Delta Air Lines fly nonstop from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Click on the "Nonstop" filter when browsing for direct Delta Air Lines flights from SEA to DCA. It's also a great way to compare other airlines servicing the same nonstop trip.
What is the earliest Delta Air Lines flight from SEA to DCA?
Browse Delta Air Lines's earliest flights from SEA to DCA by checking the "Early Morning" and "Morning" filters. Not only will you arrive at your destination sooner, early departures also have a 20% less chance of being canceled.**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.
What airports does Delta Air Lines fly into in Washington?
Get on a Delta Air Lines flight from Seattle - Tacoma Intl. Airport (SEA) to Washington, and you'll likely arrive at Ronald Reagan Washington National Airport (DCA). This is the airline's main hub in this destination.
Why fly with Delta Air Lines from SEA to DCA?
Delta Air Lines makes traveling from SEA to DCA enjoyable with an excellent in-flight experience and a rewarding loyalty program. You could even start earning points with Delta SkyMiles. Remember to join Expedia's free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
It's generally possible to cancel or reschedule your flight, although there may be additional fees if you booked more than 24 hours ago. Need flexible options? Apply the "Changes included" or "No cancel fee" filter to find flights that won't charge extra if you have to alter your plans. To update your itinerary, head to "Trips," select your flight and click on "Manage Booking" for more details.

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