$165 Cheap Frontier Airlines flights Seattle (SEA) to Washington (DCA)

View $165 flight on Wed, Oct 15, 2025Opens in a new window

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$165 Cheap Frontier Airlines flights Seattle (SEA) to Washington (DCA)

Prices were available within the past 7 days and start at $165 for one-way flights and $313 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Sep 9 - Tue, Sep 16
SEA
Seattle
DCA
Washington
$313 Roundtrip, found 1 hour ago
$313
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Sep 9 from Seattle to Washington, returning Tue, Sep 16, priced at $313 found 1 hour ago
Frontier Airlines
Fri, Sep 12 - Mon, Sep 15
SEA
Seattle
DCA
Washington
$320 Roundtrip, found 1 hour ago
$320
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Sep 12 from Seattle to Washington, returning Mon, Sep 15, priced at $320 found 1 hour ago
Frontier Airlines
Thu, Oct 2 - Tue, Oct 7
SEA
Seattle
DCA
Washington
$326 Roundtrip, just found
$326
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 2 from Seattle to Washington, returning Tue, Oct 7, priced at $326 just found
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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 Frontier Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Finding cheap one-way Frontier Airlines flights from SEA to DCA from $165 on Expedia couldn't be easier — just filter by "Price (lowest to highest)." Alternatively, check out our affordable return fares from $313 for your next getaway.**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 Frontier Airlines?
Search for return or one-way flights to Washington in January or February. You could find cheaper fares with Frontier Airlines 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 Frontier Airlines?
To find cheap Frontier Airlines fares from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence what you pay. Sunday tends to be the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**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 Frontier Airlines fly nonstop from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
To find out if there's a direct journey from SEA to DCA with Frontier Airlines or another airline, select the "Nonstop" filter when searching for flights.
What is the earliest Frontier Airlines flight from SEA to DCA?
Find Frontier Airlines's earliest flights from SEA to DCA by selecting our "Early Morning" and "Morning" filters. Not only will you get to your destination sooner, early departures also experience 20% fewer cancellations.**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 Frontier Airlines fly into in Washington?
Ronald Reagan Washington National Airport (DCA) is the main Washington hub for Frontier Airlines flights from Seattle - Tacoma Intl. Airport (SEA).
Why fly with Frontier Airlines from SEA to DCA?
Travel from SEA to DCA with Frontier Airlines and enjoy a range of benefits including a rewarding loyalty program. When booking through Expedia as a Frontier Miles and One Key™ member, you can also earn OneKeyCash™* to spend on select future travel purchases.*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 Frontier Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Changes are usually free within 24 hours of booking, but your airline may charge a fee after that time. For more information about modifying your flights, head to your "Trips," select your flight and click on "Manage Booking." If you'd like the flexibility to adjust your plans without additional costs, apply the "No cancel fee" or "Changes included" filter when organizing your next getaway.

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*Available to One Key members.