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Cheap flights from Washington, D.C. Dulles Intl Airport to Seattle from $109

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Seattle departing on 4/24. 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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Cheap Washington, D.C. Dulles Intl Airport to Seattle (IAD to SEA) flight deals and tips

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

Best Price Found

$109

Fastest flight time

5h 28m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Washington, D.C. Dulles Intl Airport in the past 72 hours is $109. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Seattle found on momondo in the last 72 hours is $236.
The fastest flight from Washington, D.C. Dulles Intl Airport to Seattle takes 5h 28m
Direct flights go from Washington, D.C. Dulles Intl Airport to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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

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 Washington, D.C. Dulles Intl Airport to Seattle?

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

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

Wednesday. The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday

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

At noon. Washington, D.C. Dulles Intl Airport to Seattle flights are approximately 44% more expensive in the morning than at noon

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

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

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

28 days before. The cheapest time to buy a flight from Washington, D.C. Dulles Intl Airport to Seattle is approximately 28 days to departure

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

As of March 2024, 13 flights take off from Washington, D.C. Dulles Intl Airport and land in Seattle each day. The most common flight departure time for this route is 4:00PM, with 85% of daily flights taking off in the afternoon.

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

As of March 2024, there are 93 flights per week flying from Washington, D.C. Dulles Intl Airport to Seattle. The most common day of the week flights depart is Friday, with 16% of flights taking off on this day.

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

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl Airport to Seattle 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 Washington, D.C. Dulles Intl Airport to Seattle flights?

You could potentially save up to 8% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to Seattle flight.

When you’re planning your trip from Washington, D.C. to Seattle, the most popular airport-to-airport route is Washington, D.C. Dulles Intl Airport to Seattle/Tacoma Intl Airport. In March, $256 is typically the cheapest round trip price you’ll find from Washington, D.C. to Seattle which you can find when you fly IAD — SEA.

Washington, D.C. Dulles Intl Airport (IAD) to Seattle/Tacoma Intl Airport (SEA)$256
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Easily compare round-trip flights from Washington, D.C. Dulles Intl Airport to Seattle

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 Washington, D.C. Dulles Intl Airport to Seattle by changing tabs
Sun Country Air
Apr 24
IAD12:00 pmWashington, D.C. Dulles Intl
7h 55m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
May 1
SEA4:45 pmSeattle/Tacoma Intl
15h 07m
1 stop
IAD10:52 amWashington, D.C. Dulles Intl
Delta
Apr 20
IAD5:45 pmWashington, D.C. Dulles Intl
5h 53m
SEA8:38 pmSeattle/Tacoma Intl
Apr 24
SEA10:30 pmSeattle/Tacoma Intl
4h 55m
IAD6:25 amWashington, D.C. Dulles Intl
United Airlines
Apr 25
IAD5:30 pmWashington, D.C. Dulles Intl
5h 48m
SEA8:18 pmSeattle/Tacoma Intl
Apr 29
SEA7:10 pmSeattle/Tacoma Intl
7h 03m
1 stop
IAD5:13 amWashington, D.C. Dulles Intl
Alaska Airlines
Apr 30
IAD7:10 amWashington, D.C. Dulles Intl
10h 17m
1 stop
SEA2:27 pmSeattle/Tacoma Intl
May 4
SEA4:03 pmSeattle/Tacoma Intl
4h 56m
IAD11:59 pmWashington, D.C. Dulles Intl
American Airlines
Apr 20
IAD3:38 pmWashington, D.C. Dulles Intl
9h 32m
1 stop
SEA10:10 pmSeattle/Tacoma Intl
Apr 27
SEA5:15 amSeattle/Tacoma Intl
8h 09m
1 stop
IAD4:24 pmWashington, D.C. Dulles Intl
Multiple Airlines
Apr 27
IAD7:40 amWashington, D.C. Dulles Intl
5h 40m
SEA10:20 amSeattle/Tacoma Intl
May 4
SEA3:15 pmSeattle/Tacoma Intl
17h 27m
1 stop
IAD11:42 amWashington, D.C. Dulles Intl

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

If you're looking for one-way flights from Washington, D.C. Dulles Intl Airport to Seattle, view some of our deals below provided by Alaska Airlines, Delta and Sun Country Air
Sun Country Air
Apr 24
IAD12:00 pmWashington, D.C. Dulles Intl
7h 55m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
Delta
Apr 24
IAD7:30 amWashington, D.C. Dulles Intl
5h 50m
SEA10:20 amSeattle/Tacoma Intl
Multiple Airlines
Apr 16
IAD11:35 amWashington, D.C. Dulles Intl
32h 23m
2 stops
SEA4:58 pmSeattle/Tacoma Intl

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

Find and compare round-trip flight prices for your last-minute flight from Washington, D.C. Dulles Intl Airport to Seattle
Delta
Apr 10
IAD7:30 amWashington, D.C. Dulles Intl
5h 50m
SEA10:20 amSeattle/Tacoma Intl
Apr 17
SEA10:30 pmSeattle/Tacoma Intl
4h 55m
IAD6:25 amWashington, D.C. Dulles Intl
United Airlines
Apr 10
IAD6:05 pmWashington, D.C. Dulles Intl
9h 53m
1 stop
SEA12:58 amSeattle/Tacoma Intl
Apr 17
SEA8:06 amSeattle/Tacoma Intl
5h 04m
IAD4:10 pmWashington, D.C. Dulles Intl
Multiple Airlines
Apr 7
IAD6:15 amWashington, D.C. Dulles Intl
19h 26m
1 stop
SEA10:41 pmSeattle/Tacoma Intl
Apr 9
SEA10:12 pmSeattle/Tacoma Intl
39h 10m
2 stops
IAD4:22 pmWashington, D.C. Dulles Intl
Alaska Airlines
Apr 10
IAD7:00 amWashington, D.C. Dulles Intl
9h 15m
1 stop
SEA1:15 pmSeattle/Tacoma Intl
Apr 23
SEA4:03 pmSeattle/Tacoma Intl
4h 56m
IAD11:59 pmWashington, D.C. Dulles Intl
American Airlines
Apr 10
IAD2:12 pmWashington, D.C. Dulles Intl
10h 58m
1 stop
SEA10:10 pmSeattle/Tacoma Intl
Apr 23
SEA5:15 amSeattle/Tacoma Intl
8h 09m
1 stop
IAD4:24 pmWashington, D.C. Dulles Intl
Sun Country Air
Apr 7
IAD6:15 amWashington, D.C. Dulles Intl
19h 26m
1 stop
SEA10:41 pmSeattle/Tacoma Intl
Apr 8
SEA6:30 pmSeattle/Tacoma Intl
13h 27m
1 stop
IAD10:57 amWashington, D.C. Dulles Intl

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $139Free CancellationRating
8.0
11,402 reviews
Search Delta flights
Alaska AirlinesPriceFrom $169Free CancellationRating
8.1
9,127 reviews
Search Alaska Airlines flights
FrontierPriceFrom $189Free CancellationRating
6.3
4,263 reviews
Search Frontier flights
United AirlinesPriceFrom $194Free CancellationRating
7.4
11,470 reviews
Search United Airlines flights
American AirlinesPriceFrom $254Free CancellationRating
7.3
15,181 reviews
Search American Airlines flights
  • Alaska Airlines Flights From Washington, D.C. Dulles Intl Airport to Seattle

    Across 10 Alaska Airlines flights from Washington, D.C. Dulles Intl Airport to Seattle this week, the average price was $396, with the best Alaska Airlines deals starting from $169 round-trip. 9,127 users have rated Alaska Airlines on momondo, with an average score of 8.1/10.

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

    The best Delta deal for Washington, D.C. Dulles Intl Airport to Seattle flight tickets found on momondo in the last 72 hours was $139, round-trip. It should be noted that an average Delta flight deal for this route in this time was higher, at $378 round-trip. Delta operates 5 flights out of Washington, D.C. Dulles Intl Airport into Seattle in an average week, so prices vary by time and availability. 11,402 Delta reviews by users on momondo have scored the airline at 8.0/10.


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

Our best Delta deals on Washington, D.C. Dulles Intl Airport to Seattle flight tickets
Delta
Apr 20
IAD5:45 pmWashington, D.C. Dulles Intl
5h 53m
SEA8:38 pmSeattle/Tacoma Intl
Apr 24
SEA10:30 pmSeattle/Tacoma Intl
4h 55m
IAD6:25 amWashington, D.C. Dulles Intl
Delta
May 1
IAD7:30 amWashington, D.C. Dulles Intl
5h 50m
SEA10:20 amSeattle/Tacoma Intl
May 7
SEA10:22 pmSeattle/Tacoma Intl
5h 03m
IAD6:25 amWashington, D.C. Dulles Intl
Delta
May 1
IAD7:30 amWashington, D.C. Dulles Intl
5h 50m
SEA10:20 amSeattle/Tacoma Intl
May 2
SEA10:30 pmSeattle/Tacoma Intl
4h 55m
IAD6:25 amWashington, D.C. Dulles Intl

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

Our best Alaska Airlines deals on Washington, D.C. Dulles Intl Airport to Seattle flight tickets
Alaska Airlines
Apr 30
IAD7:10 amWashington, D.C. Dulles Intl
10h 17m
1 stop
SEA2:27 pmSeattle/Tacoma Intl
May 4
SEA4:03 pmSeattle/Tacoma Intl
4h 56m
IAD11:59 pmWashington, D.C. Dulles Intl
Alaska Airlines
Apr 22
IAD6:57 pmWashington, D.C. Dulles Intl
16h 18m
1 stop
SEA8:15 amSeattle/Tacoma Intl
Apr 27
SEA4:03 pmSeattle/Tacoma Intl
4h 56m
IAD11:59 pmWashington, D.C. Dulles Intl
Alaska Airlines
May 1
IAD7:00 amWashington, D.C. Dulles Intl
10h 38m
1 stop
SEA2:38 pmSeattle/Tacoma Intl
May 7
SEA4:03 pmSeattle/Tacoma Intl
4h 56m
IAD11:59 pmWashington, D.C. Dulles Intl

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

    The distance between Washington, D.C. Dulles Intl and Seattle/Tacoma Intl is about 2299.7 mi. A reasonable flight in good conditions will take 5h 28m.

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

    Prices for flights from Washington, D.C. Dulles Intl Airport to Seattle/Tacoma Intl Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma 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 Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.


Alternative routes for Washington, D.C. Dulles Intl Airport to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Washington, D.C. to Seattle Flights
Fastest flight time5h 40m
Cheapest price$163
Washington, D.C. to Spokane Flights
Fastest flight time7h 30m
Cheapest price$305
Washington, D.C. to Pasco Flights
Fastest flight time7h 40m
Cheapest price$383
Washington, D.C. to Bellingham Flights
Fastest flight time7h 47m
Cheapest price$385
Washington, D.C. to Walla Walla Flights
Fastest flight time8h 48m
Cheapest price$428
Washington, D.C. to Wenatchee Flights
Fastest flight time7h 46m
Cheapest price$380
Washington, D.C. to Yakima Flights
Fastest flight time9h 03m
Cheapest price$428
Washington, D.C. to Pullman Flights
Fastest flight time8h 22m
Cheapest price$446

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Seattle for you.

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

Yes. momondo allows you to filter the results for Washington, D.C. to Seattle flights to just show those with flexible booking policies.

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

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 Washington, D.C. to Seattle.

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

Price alerts on flights to Seattle from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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