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Cheap flights from Seattle to Washington, D.C. Dulles Intl Airport from $101

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Washington, D.C. Dulles Intl Airport departing on 5/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Easily compare round-trip flights from Seattle to Washington, D.C. Dulles Intl Airport

Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Seattle to Washington, D.C. Dulles Intl Airport by changing tabs
Sun Country Air
May 25
SEA8:45 amSeattle/Tacoma Intl
8h 37m
1 stop
IAD8:22 pmWashington, D.C. Dulles Intl
May 31
IAD6:20 pmWashington, D.C. Dulles Intl
7h 30m
1 stop
SEA10:50 pmSeattle/Tacoma Intl
Alaska Airlines
May 6
SEA4:03 pmSeattle/Tacoma Intl
4h 56m
IAD11:59 pmWashington, D.C. Dulles Intl
May 9
IAD7:40 amWashington, D.C. Dulles Intl
5h 40m
SEA10:20 amSeattle/Tacoma Intl
United Airlines
May 8
SEA7:10 pmSeattle/Tacoma Intl
7h 11m
1 stop
IAD5:21 amWashington, D.C. Dulles Intl
May 14
IAD5:30 pmWashington, D.C. Dulles Intl
5h 48m
SEA8:18 pmSeattle/Tacoma Intl
Delta
May 27
SEA10:22 pmSeattle/Tacoma Intl
5h 03m
IAD6:25 amWashington, D.C. Dulles Intl
Jun 2
IAD7:31 amWashington, D.C. Dulles Intl
5h 49m
SEA10:20 amSeattle/Tacoma Intl
Multiple Airlines
Jun 1
SEA9:10 amSeattle/Tacoma Intl
8h 37m
1 stop
IAD8:47 pmWashington, D.C. Dulles Intl
Jun 4
IAD6:05 pmWashington, D.C. Dulles Intl
8h 54m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
American Airlines
Sep 19
SEA10:32 pmSeattle/Tacoma Intl
7h 04m
1 stop
IAD8:36 amWashington, D.C. Dulles Intl
Sep 24
IAD7:02 amWashington, D.C. Dulles Intl
7h 43m
1 stop
SEA11:45 amSeattle/Tacoma Intl

Find the cheapest one-way flights from Seattle to Washington, D.C. Dulles Intl Airport

If you're looking for one-way flights from Seattle to Washington, D.C. Dulles Intl Airport, view some of our deals below provided by Alaska Airlines, Delta and Sun Country Air
Sun Country Air
May 1
SEA4:45 pmSeattle/Tacoma Intl
15h 07m
1 stop
IAD10:52 amWashington, D.C. Dulles Intl
Multiple Airlines
Apr 22
SEA5:02 pmSeattle/Tacoma Intl
39h 00m
2 stops
IAD11:02 amWashington, D.C. Dulles Intl
Delta
May 15
SEA10:22 pmSeattle/Tacoma Intl
5h 03m
IAD6:25 amWashington, D.C. Dulles Intl

Search last-minute flights to Washington, D.C. Dulles Intl Airport from Seattle

Find and compare round-trip flight prices for your last-minute flight from Seattle to Washington, D.C. Dulles Intl Airport
Multiple Airlines
Apr 26
SEA10:34 pmSeattle/Tacoma Intl
34h 13m
2 stops
IAD11:47 amWashington, D.C. Dulles Intl
Apr 29
IAD11:50 amWashington, D.C. Dulles Intl
7h 35m
1 stop
SEA4:25 pmSeattle/Tacoma Intl
Sun Country Air
Apr 24
SEA6:00 pmSeattle/Tacoma Intl
14h 37m
1 stop
IAD11:37 amWashington, D.C. Dulles Intl
May 2
IAD11:50 amWashington, D.C. Dulles Intl
8h 05m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
Delta
Apr 27
SEA12:35 amSeattle/Tacoma Intl
7h 31m
1 stop
IAD11:06 amWashington, D.C. Dulles Intl
May 6
IAD7:30 amWashington, D.C. Dulles Intl
5h 50m
SEA10:20 amSeattle/Tacoma Intl
American Airlines
Apr 25
SEA5:15 amSeattle/Tacoma Intl
8h 09m
1 stop
IAD4:24 pmWashington, D.C. Dulles Intl
May 12
IAD6:50 amWashington, D.C. Dulles Intl
9h 03m
1 stop
SEA12:53 pmSeattle/Tacoma Intl
Alaska Airlines
Apr 25
SEA3:55 pmSeattle/Tacoma Intl
11h 00m
1 stop
IAD5:55 amWashington, D.C. Dulles Intl
May 12
IAD5:59 pmWashington, D.C. Dulles Intl
20h 42m
2 stops
SEA11:41 amSeattle/Tacoma Intl
United Airlines
Apr 25
SEA4:47 pmSeattle/Tacoma Intl
10h 46m
1 stop
IAD6:33 amWashington, D.C. Dulles Intl
Apr 28
IAD5:30 pmWashington, D.C. Dulles Intl
5h 48m
SEA8:18 pmSeattle/Tacoma Intl

Best airlines flying from Seattle to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Seattle to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $158Free CancellationRating
8.0
11,104 reviews
Search Delta flights
Alaska AirlinesPriceFrom $159Free CancellationRating
8.1
9,098 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $213Free CancellationRating
7.4
11,346 reviews
Search United Airlines flights
American AirlinesPriceFrom $346Free CancellationRating
7.3
14,963 reviews
Search American Airlines flights
  • Alaska Airlines Flights From Seattle to Washington, D.C. Dulles Intl Airport

    Across 14 Alaska Airlines flights from Seattle to Washington, D.C. Dulles Intl Airport this week, the average price was $398, with the best Alaska Airlines deals starting from $159 round-trip. 9,098 users have rated Alaska Airlines on momondo, with an average score of 8.1/10.

  • Delta Flights From Seattle to Washington, D.C. Dulles Intl Airport

    Delta is also a popular choice for this route. Delta flight deals for Seattle to Washington, D.C. Dulles Intl Airport start from as low as $158 round-trip, depending on your selected dates, with average Delta deals seen on momondo around $377. Delta operates 5 flights to Washington, D.C. Dulles Intl Airport from Seattle in an average week. Users have rated it 8.0/10 across 11,104 reviews.


Delta flights from Seattle to Washington, D.C. Dulles Intl Airport

Our best Delta deals on Seattle to Washington, D.C. Dulles Intl Airport flight tickets
Delta
May 27
SEA10:22 pmSeattle/Tacoma Intl
5h 03m
IAD6:25 amWashington, D.C. Dulles Intl
Jun 2
IAD7:31 amWashington, D.C. Dulles Intl
5h 49m
SEA10:20 amSeattle/Tacoma Intl
Delta
May 29
SEA8:35 amSeattle/Tacoma Intl
5h 09m
IAD4:44 pmWashington, D.C. Dulles Intl
May 30
IAD7:35 amWashington, D.C. Dulles Intl
5h 45m
SEA10:20 amSeattle/Tacoma Intl
Delta
May 24
SEA10:22 pmSeattle/Tacoma Intl
5h 03m
IAD6:25 amWashington, D.C. Dulles Intl
May 26
IAD7:35 amWashington, D.C. Dulles Intl
5h 45m
SEA10:20 amSeattle/Tacoma Intl

United Airlines flights from Seattle to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Seattle to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
May 8
SEA7:10 pmSeattle/Tacoma Intl
7h 11m
1 stop
IAD5:21 amWashington, D.C. Dulles Intl
May 14
IAD5:30 pmWashington, D.C. Dulles Intl
5h 48m
SEA8:18 pmSeattle/Tacoma Intl
United Airlines
May 13
SEA8:06 amSeattle/Tacoma Intl
5h 04m
IAD4:10 pmWashington, D.C. Dulles Intl
May 15
IAD4:03 pmWashington, D.C. Dulles Intl
9h 50m
1 stop
SEA10:53 pmSeattle/Tacoma Intl
United Airlines
May 8
SEA7:10 pmSeattle/Tacoma Intl
7h 11m
1 stop
IAD5:21 amWashington, D.C. Dulles Intl
May 14
IAD4:03 pmWashington, D.C. Dulles Intl
9h 50m
1 stop
SEA10:53 pmSeattle/Tacoma Intl

How to get the cheapest flight ticket from Seattle to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

February. The cheapest time of year to fly to Washington, D.C. Dulles Intl Airport from Seattle is February. Most expensive is June

What is the cheapest day to depart Seattle for Washington, D.C. Dulles Intl Airport?

Thursday. The cheapest day of the week is typically Thursday. The most expensive is typically Monday

When is the cheapest time to fly from Seattle to Washington, D.C. Dulles Intl Airport?

In the afternoon. Seattle to Washington, D.C. Dulles Intl Airport flights are approximately 16% more expensive in the morning than in the afternoon

What is the cheapest airline that flies to Washington, D.C. Dulles Intl Airport from Seattle?

Delta. Alaska Airlines, American Airlines, and Delta are the most popular carriers operating from Seattle to Washington, D.C. Dulles Intl Airport

How far in advance should you book Seattle to Washington, D.C. Dulles Intl Airport flights?

25 days before. The cheapest time to buy a flight from Seattle to Washington, D.C. Dulles Intl Airport is approximately 25 days to departure

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

15 flights are operational weekly from Seattle to Washington, D.C. Dulles Intl Airport as of April 2024. The most popular departure time for this route is 7:00AM, with 59% of flights per day taking off at noon.

How many flights depart from Seattle to Washington, D.C. Dulles Intl Airport on average per week?

108 flights are operational weekly from Seattle to Washington, D.C. Dulles Intl Airport as of April 2024. The most popular departure day for this route is Monday, with 16% of flights per week taking off on this day.

What cabin class options are available on Seattle to Washington, D.C. Dulles Intl Airport flights?

There are 4 cabin classes available to choose from on Seattle to Washington, D.C. Dulles Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Washington, D.C. Dulles Intl Airport flights?

No. A direct flight is the cheapest option for a flight between Seattle to Washington, D.C. Dulles Intl Airport.

Cheap Seattle to Washington, D.C. Dulles Intl Airport (SEA to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Washington, D.C. Dulles Intl Airport

Best Price Found

$101

Fastest flight time

4h 52m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Seattle in the past 72 hours is $101. The best round-trip flight deal from Seattle to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $275.
The fastest flight from Seattle to Washington, D.C. Dulles Intl Airport takes 4h 52m
Direct flights go from Seattle to Washington, D.C. Dulles Intl Airport every day.

  • How far is Seattle/Tacoma Intl to Washington, D.C. Dulles Intl by plane?

    There are 2299.7 mi between Seattle/Tacoma Intl and Washington, D.C. Dulles Intl. A reasonable flight in good conditions will take 4h 52m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.


Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Washington, D.C.?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Washington, D.C. with flexible booking policies on momondo?

Yes. All flights to Washington, D.C. from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Washington, D.C.?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Washington, D.C..

I’m not ready to book a flight from Seattle to Washington, D.C. right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.


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