$110 Cheap Frontier Airlines flights Washington (DCA) to Seattle (SEA)

View $110 flight on Sat, Jan 17, 2026Opens in a new window
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$110 Cheap Frontier Airlines flights Washington (DCA) to Seattle (SEA)

Prices were available within the past 7 days and start at $110 for one-way flights and $219 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Jan 17 - Wed, Jan 21
DCA
Washington
SEA
Seattle
$219 Roundtrip, found 2 hours ago
$219
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Jan 17 from Washington to Seattle, returning Wed, Jan 21, priced at $219 found 2 hours ago
Frontier Airlines
Sat, Jan 17 - Wed, Jan 21
DCA
Washington
SEA
Seattle
$225 Roundtrip, found 2 hours ago
$225
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Jan 17 from Washington to Seattle, returning Wed, Jan 21, priced at $225 found 2 hours ago
Frontier Airlines
Sat, Jan 17 - Wed, Jan 21
DCA
Washington
SEA
Seattle
$235 Roundtrip, found 2 hours ago
$235
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Jan 17 from Washington to Seattle, returning Wed, Jan 21, priced at $235 found 2 hours ago

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

May is typically the cheapest month to fly

From $160 - $491 per traveler.

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 $567
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $567

Frequently asked questions

How much is a Frontier Airlines flight from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
Set the "Price (lowest to highest)" filter on Expedia to search for cheap Frontier Airlines round-trip flights from $219 from DCA to SEA. Affordable one-way tickets from $110 are also on offer.**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 DCA to SEA with Frontier Airlines?
Frontier Airlines flights to Seattle tend to be cheaper in the low-season months of January and February. Whether you're after a return or one-way ticket, you could score a better deal then.
What is the cheapest time to book flights from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA) with Frontier Airlines?
Begin your search one to three months ahead of your travel date to get cheap fares on Frontier Airlines flights from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic flights.*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 Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
Click on our "Nonstop" filter when looking for direct Frontier Airlines flights from DCA to SEA. It's also an easy way to compare other airlines servicing the same nonstop route.
What is the earliest Frontier Airlines flight from DCA to SEA?
Browse Frontier Airlines's earliest flights from DCA to SEA by using the "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 Seattle?
Jump on a Frontier Airlines flight from Ronald Reagan Washington National Airport (DCA) to Seattle, and you'll most likely land at Seattle - Tacoma Intl. Airport (SEA). This is the airline's main hub in this destination.
Why fly with Frontier Airlines from DCA to SEA?
Travel from DCA to SEA with Frontier Airlines and you can look forward to a range of benefits including a rewarding loyalty program. When you book through Expedia as a Frontier Miles and One Key™ member, you could also earn OneKeyCash™* to use 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 Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
In most cases, you can cancel or change your flight, although additional fees may apply if your booking was made over 24 hours ago. Prefer to keep your options open? Make use of our "No cancel fee" or "Changes included" filter to find flights that won't charge extra if you have to revise your plans. To modify your booking, go to "Trips," select your flight and click on "Manage Booking" for further information.

Travel information

Origin airport
Ronald Reagan Washington National
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, Southwest Airlines, United
Popular airline
Alaska Airlines
Distance
2322 mi
Average flight time
2 hours 58 mins

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