Cheap flights from Seattle to Washington, D.C. (SEA - WAS)

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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 Wednesday or Thursday and return on a Wednesday

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
$254 - $408
WAS
Temperature
35.6 - 80.6 °F
WAS
Rainfall
2.6 - 4 inches

Popular in

December

High demand for flights, 24% potential price rise

Cheapest in

August

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

Round-trip from

$254

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

One-way from

$168

One-way flight 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.?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 53% on flights from Seattle to Washington, D.C. compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $376. For sooner than that we have options available in the next 3 days from $478.

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

August is one of the best times of the year to fly to Washington, D.C. from Seattle. Prices for August average $308 per person but you can even find prices for as low as $137. The most expensive prices can be found in the month of December. Opting for a August flight can save you 32% on your journey compared to booking in December

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

When flying from Seattle to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 33% versus a flight at noon.

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

Tuesday is generally a great day to depart. Flying on this day could help you save up to 25%.

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

The best prices found for SEA to WAS flights for May, June
26 May - 29 Aug
$378pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
29 May - 29 Aug
$460pp
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
24 Jun - 5 Jul
$465pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
JetBlue
 
1 STOP
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
13 Sep - 14 Sep
$276pp
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
30 Aug - 13 Sep
$279pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
10 Sep - 17 Sep
$281pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl

Non-stop flights to Washington, D.C. from Seattle

Save time with Seattle to Washington, D.C. direct flight deals
28 Sep - 2 Nov
$298pp
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Delta
Non-Stop
SEA
Seattle/Tacoma Intl
27 Sep - 4 Oct
$305pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
Non-Stop
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
27 Sep - 3 Oct
$326pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Alaska Airlines
Non-Stop
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
$460pp
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
30 May - 6 Jun
$468pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
29 May - 30 Aug
$486pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl

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

The cheapest one-way flights from Seattle to Washington, D.C.
12:22 pm - 7:25 am
United Airlines
2 Stops
16h 03m
SEA - IAD
United Airlines
$168
United
7:46 am - 2:15 am
Spirit Airlines
1 Stop
15h 29m
SEA - BWI
Spirit Airlines
$173
Kiwi.com
10:05 am - 7:55 pm
Delta
1 Stop
6h 50m
SEA - BWI
Delta
$174
Delta

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), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Washington, D.C.. 8 airlines have flights from Seattle/Tacoma Intl to Washington, D.C. on a regular basis. Booking flights from Seattle/Tacoma Intl to Washington, D.C. should not be difficult; the airport handles an average of 16 outbound flights to Washington, D.C. per day.

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

Some of our airline partners flying from Seattle/Tacoma Intl to Washington, D.C. have new flexible policies in place due to COVID-19. Alaska Airlines, Delta, and United Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Alaska Airlines with this kind of flexibility.

Can I find flights from Seattle to Washington, D.C. for under $300 on Cheapflights?

Yes, there are multiple flights from Seattle to Washington, D.C. for under $300. The cheapest flight booked recently is on Delta for just $276, but on average you can expect to pay $302.

Are there nonstop flights from Seattle to Washington, D.C. for under $300 on Cheapflights?

Cheapflights has at least 20 direct flights from Seattle to Washington, D.C. under $300. A good price for a nonstop flight from Seattle to Washington, D.C. is less than $347.

Are there last-minute flights available from Seattle to Washington, D.C. for under $500?

There are currently 20+ open flights from Seattle to Washington, D.C. within the next 7 days for less than $500.

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

Days when nonstop flights are available for this flight are: Sunday, Thursday.

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

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

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

A quick flight from Seattle to Washington, D.C. can take about 4h 52m. Delta provides one of the quickest options available for as low as $276. The distance between Seattle and Washington, D.C. is about 2313 mi. This flight may include one or multiple stops.

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

Our cheapest airline available from Seattle to Washington, D.C. is Delta. Our recent data shows that you can find tickets from as low as $276 on this airline. Additional options worth looking into are Sun Country Air and United Airlines, starting at $301 and $307 round-trip. Delta is currently priced 10% below the average price you’ll pay for this route.

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

The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $138. However, be on the lookout for offers from Spirit Airlines and United Airlines, as they are both options that can get you from Seattle to Washington, D.C. for a low price.

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

No one likes to see their flight delayed. When booking a flight from Seattle to Washington, D.C. consider choosing ANA (100%), China Eastern (90%) or Austrian Airlines (85%) as they are the most reliable in getting you off to your destination on time.

What are the cheapest flights from Seattle to Washington, D.C.?

While on average a flight from Seattle to Washington, D.C. is generally $802, our data shows the cheapest flight currently is $154. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Dulles Intl), you can expect to pay $298 for that flight.

What are the most popular routes from Seattle to Washington, D.C.?

The most popular flight routes from Seattle to Washington, D.C. are Seattle/Tacoma Intl - Washington, D.C. Dulles Intl, Seattle/Tacoma Intl - Washington, D.C. Reagan-National and Seattle/Tacoma Intl - Baltimore/Washington.

What are the most popular airlines that fly from Seattle to Washington, D.C.?

American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from Seattle to Washington, D.C..

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 29m
Average temperature for May in Washington, D.C.
77.0 °F
Avg rainfall for May in Washington, D.C.
4.1 ″

Airports servicing Seattle

Airports servicing Washington, D.C.

Reagan-National (DCA)

Top 8 airlines flying from Seattle/Tacoma Intl to Washington, D.C.

The chart below displays the airlines Cheapflights users traveling from Seattle to Washington, D.C. choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Juneyao Airlines
$14 $19 No cancel fee 66%

We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information.

Frontier
$78 $192 No cancel fee 62%
Delta
$108 $366 No cancel fee N/A
Alaska Airlines
$119 $319 No cancel fee 75%
Sun Country Air
$126 $259 No cancel fee 83%
United Airlines
$128 $378 No cancel fee 69%
American Airlines
$136 $317 No cancel fee 71%
JetBlue
$149 $313 No cancel fee 62%

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 SEA to WAS departures
Afternoon Noon to 6 PM 23% of SEA to WAS departures
Early morning Midnight to 6 AM 1% of SEA to WAS departures
Evening 6 PM to midnight 0% of SEA to WAS 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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