$184 Cheap Delta flights Seattle (SEA) to Washington (DCA)

View $184 flight on Fri, Sep 26, 2025Opens in a new window

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$184 Cheap Delta flights Seattle (SEA) to Washington (DCA)

Prices were available within the past 7 days and start at $184 for one-way flights and $327 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, Sep 26 - Tue, Sep 30
SEA
Seattle
DCA
Washington
$327 Roundtrip, found 1 hour ago
$327
Roundtrip
found 1 hour ago
Select Delta flight, departing Fri, Sep 26 from Seattle to Washington, returning Tue, Sep 30, priced at $327 found 1 hour ago
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
Popular airline
Alaska Airlines
Distance
2322 mi

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 $184 on Expedia is simple — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from $327 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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