Cheap flights from Seattle to Washington, D.C.

Round-trip
Economy
Seattle (SEA)
Washington, D.C. (WAS)
Depart
Return
Any month
Compare vs. Cheapflights |

The best prices from Seattle/Tacoma Intl to Washington, D.C. are usually found in August or February, booked 60 days in advance, depart on a Thursday or Friday and return on a Monday

How to find the cheapest flight from
Seattle (SEA) to Washington, D.C. (WAS)

All the information you need to plan the best SEA to WAS flight in 2022: compare Seattle to Washington, D.C. flight prices with the expected peak season, weather and rainfall in Washington, D.C..
SEA - WAS
Price
C$ 254 - C$ 408
WAS
Temperature
2 - 27 °C
WAS
Rainfall
66 - 102 mm

Popular in

December

High demand for flights, 24% potential price rise

Cheapest in

August

Best time to find cheap flights, 18% potential price drop

Average price

C$ 381

Average for round-trip flights in May 2022

Round-trip from

C$ 325

From Seattle/Tacoma Intl to Washington, D.C. (WAS)

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from Seattle to Washington, D.C.?

Find a great deal and save up to 53% by booking at least 61 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Seattle to Washington, D.C. within the next two weeks, with the cheapest ticket starting at C$ 481.

When is the cheapest time to fly from Seattle to Washington, D.C. (SEA - WAS)?

Unlike in the evening, when flights are generally more expensive, you can save up to 69% on flights from Seattle to Washington, D.C. by exploring options for tickets in the afternoon.

What is the cheapest month to fly from Seattle to Washington, D.C.?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, August can be a great choice for travel to Washington, D.C.. Flights to Washington, D.C. from Seattle in August are about C$ 395 on average during August, but can be found for as low as C$ 175.

What is the cheapest day to fly round-trip from Seattle to Washington, D.C.?

Travellers have found that booking a Thursday departure is the best way to save up to 130% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

Cheap flights from Seattle to Washington, D.C. in May, June 2022

The best prices found for SEA to WAS flights for May, June
29 May - 29 Aug
C$ 588pp
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
5 Jun - 3 Oct
C$ 671pp
SEA
Seattle/Tacoma Intl
JetBlue
 
1 STOP
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
JetBlue
 
1 STOP
SEA
Seattle/Tacoma Intl
22 Jun - 24 Sep
C$ 739pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl

Seattle/Tacoma Intl to Washington, D.C. 2022 flight deals

Cheap flights to Washington, D.C. from Seattle found for this year
8 Oct - 15 Oct
C$ 381pp
SEA
Seattle/Tacoma Intl
United Airlines
Direct
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
Direct
SEA
Seattle/Tacoma Intl
8 Oct - 22 Oct
C$ 393pp
SEA
Seattle/Tacoma Intl
Delta
Direct
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
28 Sep - 2 Nov
C$ 398pp
SEA
Seattle/Tacoma Intl
United Airlines
   
2 STOPS
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
Direct
SEA
Seattle/Tacoma Intl

Direct flights to Washington, D.C. from Seattle

Save time with Seattle to Washington, D.C. direct flight deals
8 Oct - 15 Oct
C$ 381pp
SEA
Seattle/Tacoma Intl
United Airlines
Direct
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
United Airlines
Direct
SEA
Seattle/Tacoma Intl
13 Sep - 17 Sep
C$ 418pp
SEA
Seattle/Tacoma Intl
Delta
Direct
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Delta
Direct
SEA
Seattle/Tacoma Intl
8 Sep - 12 Sep
C$ 419pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl

Last minute flights from Seattle to Washington, D.C.

Late deals on round-trip flights to Washington, D.C. from Seattle, departing today and this week
29 May - 29 Aug
C$ 588pp
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
1 Jun - 3 Jun
C$ 826pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
30 May - 4 Jun
C$ 834pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl

One-way flights to Washington, D.C. from Seattle

The cheapest one-way flights from Seattle to Washington, D.C.
4:36 p.m. - 12:46 a.m.
Alaska Airlines
Direct
5h 10m
SEA - IAD
Alaska Airlines
C$ 331
Alaska Airlines
10:51 a.m. - 7:25 a.m.
United Airlines
2 stops
17h 34m
SEA - IAD
United Airlines
C$ 350
United
7:06 p.m. - 8:37 a.m.
JetBlue
1 stop
10h 31m
SEA - DCA
JetBlue
C$ 354

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Seattle</span> to <span class="emphasized">Washington, D.C.</span> flights.

Flight FAQs

From Seattle to Washington, D.C.

What airport do you fly from for flights from Seattle to Washington, D.C.?

Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Seattle/Tacoma Intl; the airport handles an average of 16 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 2 airlines have flights from the Seattle airport to Washington, D.C.. It is only a 18.4 km journey to Seattle/Tacoma Intl (SEA) from Seattle’s city centre.

Which airlines flying from Seattle/Tacoma Intl to Washington, D.C. have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like Alaska Airlines and United Airlines flying from Seattle/Tacoma Intl to Washington, D.C. have implemented new flexible cancellation policies.

Can I find flights from Seattle to Washington, D.C. for under C$ 400 on Cheapflights?

Yes, there are multiple flights from Seattle to Washington, D.C. for under C$ 400. The cheapest flight booked recently is on United Airlines for just C$ 381, but on average you can expect to pay C$ 425.

Are there direct flights from Seattle to Washington, D.C. for under C$ 400 on Cheapflights?

Cheapflights has 20 direct flights from Seattle to Washington, D.C. under C$ 400. A good price for a direct flight from Seattle to Washington, D.C. is less than C$ 527.

Are there last-minute flights available from Seattle to Washington, D.C. for under C$ 600?

There are currently 20+ open flights from Seattle to Washington, D.C. within the next 7 days for less than C$ 600.

What days are direct flights available from Seattle to Washington, D.C.?

You can find direct flights on the following days: Sunday, Thursday.

How many flights depart from Seattle to Washington, D.C. on average per day?

4 flight departures from Seattle to Washington, D.C. per day on average.
Morning (6am - Midday) - 50% of flight departures
Afternoon (Noon - 6pm) - 50% of flight departures

How long is the flight from Seattle to Washington, D.C.?

United Airlines, Delta, and Alaska Airlines can get you from Seattle to Washington, D.C. in just under 4h 49m. Your travel time will be generally consistent. The distance between Seattle and Washington, D.C. is about 3722 km. All flights are typically direct.

What are the cheapest airlines flying from Seattle to Washington, D.C. round-trip?

Currently priced at C$ 381, United Airlines will fly you from Seattle to Washington, D.C. and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and Alaska Airlines - these airlines can fly you to your destination from C$ 393 and C$ 419, respectively. These flights start at 3% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Seattle to Washington, D.C. one-way?

For one-way options, check prices for Delta. According to our data, you can fly for as low as C$ 191. Users have also found prices from C$ 202 and C$ 254 on United Airlines and Alaska Airlines, respectively.

What are the most reliable airlines from Seattle to Washington, D.C.?

Before booking your flight to Washington, D.C. from Seattle, check out the most reliable airlines to get you to your destination on time: ANA (100%), China Eastern (90%), Austrian Airlines( 85%).

COVID Restrictions

View COVID Travel Restrictions for Washington, D.C., DC

Do I need a COVID test to fly to Washington, D.C. from Seattle?

Information is based on travel restrictions for travel to Washington, D.C. within the United States

Most visitors from Seattle/Tacoma Intl need to provide a negative COVID-19 test result and/or quarantine to enter Washington, D.C..

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Washington, D.C..

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Washington, D.C..

Do I need a test to fly back to Seattle from Washington, D.C.?

Returning to Seattle/Tacoma Intl from Washington, D.C.

COVID-19 testing requirements
Visitors from Washington, D.C. must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Washington, D.C. are not required to quarantine after entering Seattle/Tacoma Intl.

Hide COVID Travel Restrictions for Washington, D.C., DC

Destination information for Washington, D.C.

Things to know before you go - useful duration and weather info for your trip from Seattle to Washington, D.C..
Flight duration from SEA to Washington, D.C.
5h 27m
Average temperature for May in Washington, D.C.
25.0 °C
Avg rainfall for May in Washington, D.C.
103.0 mm

Airports servicing Seattle

Airports servicing Washington, D.C.

Reagan-National (DCA)

Hourly flight availability from Seattle to Washington, D.C.

See what time of day planes typically take off from Seattle towards Washington, D.C..
Morning 6 AM to noon 76% of flight departures
Afternoon Noon to 6 PM 23% of flight departures
Early morning Midnight to 6 AM 1% of flight departures
Evening 6 PM to midnight 0% of flight departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Seattle to Washington, D.C.
See how many times per day planes take to the skies headed from Seattle to Washington, D.C..
Sunday
17 daily flights
Monday
17 daily flights
Tuesday
15 daily flights
Wednesday
14 daily flights
Thursday
18 daily flights
Friday
15 daily flights
Saturday
16 daily flights
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