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Seattle to Washington D.C. Flight Information

Below are some common questions asked about this flight route:

Best time to book Seattle to Washington D.C. flights

Generally the best time to book Seattle to Washington D.C. flights is two months in advance. And the cheapest days to fly are Tuesdays, Wednesdays, and Saturdays. Sunday is the most expensive.

How many direct flights from Seattle to Washington D.C.?

There are 42 direct flights from Seattle to Washington D.C..

What is the most popular airline for non-stop flights from Seattle to Washington D.C.?

United Airlines provides 50 of the non-stop flights between Seattle and Washington D.C..

Airlines flying this route:
Airports in Seattle:
Airports in Washington D.C.:
Average duration of direct flights: 4h55m

Seattle to Washington D.C. Flight Schedule

Flight info. Departure
Arrival
Route Weekly Schedule
23:34 SEA 07:17 IAD
Seattle to Washington D.C. SMTWTFS Search
08:15 SEA 16:20 IAD
Seattle to Washington D.C. SMTWTFS Search
SK8764
Sas
08:15 SEA 16:07 IAD
Seattle to Washington D.C. SMTWTF- Search
LH7485
08:15 SEA 16:20 IAD
Seattle to Washington D.C. SMTWTFS Search
AV2029
23:25 SEA 07:11 IAD
Seattle to Washington D.C. SMTWTFS Search
08:00 SEA 16:10 DCA
Seattle to Washington D.C. SMTWTFS Search
08:10 SEA 16:20 IAD
Seattle to Washington D.C. SMTWTFS Search
13:45 SEA 21:55 DCA
Seattle to Washington D.C. SMTWTFS Search
08:15 SEA 16:20 IAD
Seattle to Washington D.C. SMTWTFS Search
LH7487
13:00 SEA 20:55 IAD
Seattle to Washington D.C. SMTWTFS Search
13:00 SEA 20:55 IAD
Seattle to Washington D.C. SMTWTFS Search
22:00 SEA 05:58 IAD
Seattle to Washington D.C. ------- Search
23:25 SEA 07:11 IAD
Seattle to Washington D.C. SMTWTFS Search
CM2765
23:25 SEA 07:11 IAD
Seattle to Washington D.C. SMTWTFS Search
KE3025
22:22 SEA 06:13 IAD
Seattle to Washington D.C. SMTWTF- Search
KE6268
13:45 SEA 21:55 DCA
Seattle to Washington D.C. SMTWTFS Search
NH7282
ANA
13:00 SEA 20:55 IAD
Seattle to Washington D.C. SMTWT-S Search
08:15 SEA 16:20 IAD
Seattle to Washington D.C. SMTWTFS Search
08:15 SEA 16:07 IAD
Seattle to Washington D.C. SMTWTFS Search
06:30 SEA 22:25 DCA
Seattle to Washington D.C. ----TF- Search

Seattle to Washington Dulles International Airport (IAD)

08:15, Nov 20 - 08:45, Nov 24
UA | United Airlines
4h 52m
SEA - IAD
Nonstop
US$285
Round-trip from
Search
10:25, Dec 11 - 19:25, Dec 14
AS | Alaska Airlines
4h 55m
SEA - IAD
Nonstop
US$289
Round-trip from
Search
08:00, Nov 20 - 08:45, Nov 24
DL | Delta Air Lines
4h 54m
SEA - IAD
Nonstop
US$298
Round-trip from
Search
12:04, Nov 20 - 08:45, Nov 24
AA | American Airlines
10h 12m
SEA - IAD
1 stop
US$312
Round-trip from
Search

Seattle to Ronald Reagan Washington National Airport (DCA)

13:55, Dec 25 - 08:30, Jan 1
AS | Alaska Airlines
5h 3m
SEA - DCA
Nonstop
US$441
Round-trip from
Search
17:50, Nov 22 - 17:13, Nov 24
F9 | Frontier Airlines
20h 15m
SEA - DCA
1 stop
US$396
Round-trip from
Search
06:00, Dec 25 - 08:30, Jan 1
AA | American Airlines
7h 59m
SEA - DCA
1 stop
US$428
Round-trip from
Search
09:05, Nov 22 - 17:13, Nov 24
WN | Southwest Airlines
6h 50m
SEA - DCA
1 stop
US$591
Round-trip from
Search
06:00, Dec 11 - 05:40, Dec 14
AA | American Airlines
7h 58m
SEA - DCA
2 stop
US$274
Round-trip from
Search

Prices shown are for 1 adult ticket including taxes & fees.(As ticket fares can change frequently, these advertised prices are for reference only. The actual prices will be shown at time of booking.)

Roundtrip vs One-Way Flights from Seattle to Washington D.C.

There is usually no major price difference between buying a roundtrip flight versus a one-way flight. Increased flexibility is the main benefit when it comes to buying a one-way flight from Seattle to Washington D.C.. However, booking a roundtrip flight is a simpler process. You can compare roundtrip and one-way flights by using our flight comparison tool.

Nonstop vs Connecting Flights from Seattle to Washington D.C.

The average price for connecting flights from Seattle to Washington D.C. is USD 296.20.The average price for nonstop flights from Seattle to Washington D.C. is USD 360.65.

Travel from Seattle to Washington D.C.

Washington D.C. attracts thousands of visitors every year for both business and pleasure. Planning a trip from Seattle to Washington D.C. is easy when you use Trip.com to help you make travel arrangements. With Trip.com, you can search for available flights and hotel rooms, and then make your booking quickly and easily online.

A Trip to Remember

Make your journey from Seattle to Washington D.C. a trip to remember when you use Trip.com to review city attractions before you arrive. With a preview of what's available at your destination, you can make any necessary reservations in advance for the best travel experience possible.