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SEA - IAD

Find cheap flights from Seattle to Washington Dulles Airport from $135

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Dulles Intl departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Wed 6/12
Wed 6/19

Search hundreds of travel sites at once for deals on flights to Washington Dulles Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Washington, D.C., as well as popular online travel agencies
In the last 7 days travelers have searched 41,771,603 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Seattle to Dulles Intl (SEA-IAD)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
11:59 pm - 12:57 pmSEA-IAD
9h 58m1 stop
6:10 pm - 9:22 amIAD-SEA
18h 12m1 stop
$270Sun Country Air
Find Deal
Thu, Jun 13 - Tue, Jun 18
11:59 pm - 1:10 pmSEA-IAD
10h 11m1 stop
11:32 am - 4:59 pmIAD-SEA
8h 27m1 stop
$280Sun Country Air
Find Deal
Mon, Jul 15 - Tue, Jul 23
11:29 pm - 7:28 amSEA-IAD
4h 59mnonstop
10:15 pm - 12:59 amIAD-SEA
5h 44mnonstop
$283United Airlines
Find Deal
Tue, Jun 11 - Tue, Jun 18
5:00 am - 5:15 pmSEA-IAD
9h 15m1 stop
5:46 pm - 10:57 pmIAD-SEA
8h 11m1 stop
$285American Airlines
Find Deal
Tue, Aug 13 - Tue, Aug 20
9:46 pm - 8:44 amSEA-IAD
7h 58m1 stop
5:29 pm - 10:57 pmIAD-SEA
8h 28m1 stop
$287American Airlines
Find Deal
Tue, Aug 6 - Wed, Sep 4
10:00 pm - 6:05 amSEA-IAD
5h 05mnonstop
5:50 pm - 8:37 pmIAD-SEA
5h 47mnonstop
$289Delta
Find Deal
Tue, Aug 13 - Tue, Aug 20
11:59 pm - 9:55 amSEA-IAD
6h 56m1 stop
10:15 pm - 12:59 amIAD-SEA
5h 44mnonstop
$292United Airlines
Find Deal
Tue, Jun 11 - Sat, Jun 15
10:22 pm - 6:26 amSEA-IAD
5h 04mnonstop
7:31 am - 10:20 amIAD-SEA
5h 49mnonstop
$313Delta
Find Deal
Mon, Jun 3 - Wed, Jun 5
4:00 pm - 11:59 pmSEA-IAD
4h 59mnonstop
7:00 am - 9:30 amIAD-SEA
5h 30mnonstop
$317Alaska Airlines
Find Deal
Mon, Jun 3 - Tue, Jun 4
4:06 pm - 11:59 pmSEA-IAD
4h 53mnonstop
7:02 am - 9:53 amIAD-SEA
5h 51mnonstop
$323Alaska Airlines
Find Deal
Thu, Sep 26 - Wed, Oct 9

Flights from Seattle to Dulles Intl - Travel Insights & Trends

Get data-powered insights and trends into flights from Seattle to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Seattle to Washington Dulles Airport?

The average price of all flights from Seattle to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.
When flying from Seattle to Washington Dulles Airport, you should consider leaving on a Thursday and avoid Mondays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Wednesdays and the most expensive ones on Sundays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Seattle to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Seattle to Washington, D.C. Dulles Intl Airport is January, where tickets cost $298 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $489 and $478 respectively.

How far in advance should I book a flight from Seattle to Washington, D.C. Dulles Intl Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Seattle to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Seattle to Washington, D.C. Dulles Intl Airport, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 61 days before departure.

Which airlines provide the cheapest flights from Seattle to Washington Dulles Airport?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Seattle to Washington Dulles Airport found on KAYAK was with Sun Country Air for $135. Sun Country Air proposed a round-trip connection from $270 and United Airlines from $283.

Which airlines fly most frequently between Seattle and Washington Dulles Airport?

Alaska Airlines connects Seattle to Washington Dulles Airport with up to 4 flights per day and both Delta and United Airlines also offer 4 flights per day.

Which airlines fly non-stop between Seattle and Washington, D.C. Dulles Intl Airport?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Seattle to Washington, D.C. Dulles Intl Airport.
There are 3 airlines that fly nonstop from Seattle to Washington, D.C. Dulles Intl Airport. They are: Alaska Airlines, Delta and United Airlines. The cheapest price of all airlines flying this route was found with Delta at $154 for a one-way flight. On average, the best prices for this route can be found at Delta.

How many flights are there between Seattle and Washington, D.C. Dulles Intl Airport per day?

Each day, there are between 11 and 15 nonstop flights that take off from Seattle and land in Washington, D.C. Dulles Intl Airport, with an average flight time of 5h 03m. The most common departure time is 11:00 pm and most flights take off in the morning. Each week, there are 94 flights. The most frequent day of departure is Friday, when 16% of all weekly flights depart. The fewest flights depart on a Saturday.

Which cabin class options are there for flights between Seattle and Washington, D.C. Dulles Intl Airport?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Seattle to Washington Dulles Airport take?

A direct flight to Washington Dulles Airport will take on average 4h 49m to travel the 2,299 miles flying distance from Seattle.

What’s the earliest departure time from Seattle to Washington Dulles Airport?

Early birds can take the earliest flight from Seattle at 8:01 am and will be landing in Washington, D.C. Dulles Intl Airport at 4:13 pm.

What’s the latest departure time from Seattle to Washington Dulles Airport?

If you prefer to fly at night, the latest flight from Seattle to Washington, D.C. Dulles Intl Airport jets off at 11:38 pm and lands at 7:30 am.

Good to know

Low season

February

High season

June

Cheapest flight

$135
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 23% increase in price.
Flight from Seattle to Washington Dulles Airport

When to book flights from Seattle to Dulles Intl

Are your dates flexible? Find out the best times to travel from Seattle to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Seattle to Washington Dulles Airport flights

  • Is there a lounge at Seattle-Tacoma International Airport?

    If you want a quiet place where you can relax while you wait for your flight from Seattle to Washington, DC, you can head to the Club at SEA. There are two locations in Concourse A. The one by Gate A12 is open from around 5 am to midnight. The second is above Gate S10 on the mezzanine floor and is open from about 6 am to 7 pm. For about $45, you can enjoy snacks and beverages, including bar service, as well as television and magazines.

  • Will there be inflight entertainment on my trip from Seattle to Washington?

    Many airlines offering flights to Washington Dulles Airport from Seattle provide inflight entertainment. You can check which ones do by expanding the aircraft details in your KAYAK search results. For example, United Airlines has both personal seatback systems as well as streaming options for passengers to enjoy movies, music, and shows.

  • Are there pet relief areas at the airports in Seattle and Washington, DC?

    If you are traveling with your pet or service animal, both airports have pet relief stations with waste disposal bags and trash receptacles. In SEA, there are several pet relief areas throughout the airport, including in the main terminal and in Concourses D, S, and N. In IAD, you can find them by Gates D1 and A32, as well as by the parking lot across from the exit by Baggage Claim 1.

  • Can I rent a car at IAD?

    Many of the major car rental companies offer services at IAD, including Avis, Enterprise, and SIXT. You can catch a shuttle to locations outside Doors 2 and 4 from baggage claim at Curbs 2C or 2D.

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

    In the last 3 days, the lowest price for a flight from Seattle to Washington, D.C. Dulles Intl Airport was $135 for a one-way ticket and $270 for a round-trip.

  • Do I need a passport to fly between Seattle and Washington Dulles Airport?

    No

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Washington Dulles Airport?

    All the following airlines offer inflight Wi-Fi service on the Seattle to Washington Dulles Airport flight route: Alaska Airlines, JetBlue, American Airlines, Delta, United Airlines, and Lufthansa.

  • Which aircraft models fly most regularly from Seattle to Washington Dulles Airport?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Seattle to Washington Dulles Airport flight route.

  • Which airline alliances offer flights from Seattle to Washington Dulles Airport?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Seattle and Washington Dulles Airport, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Seattle to Washington Dulles Airport?

    There are nonstop flights from Seattle to Washington Dulles Airport on a daily basis.

  • Which is the best airline for flights from Seattle to Washington, D.C., Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Seattle to Washington, D.C. are Alaska Airlines and Delta. With an average price for the route of $396 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $371 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Seattle to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Seattle with another airline. Booking your flights between Seattle and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from SEA to Washington Dulles Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $194 or less one-way and $345 or less round-trip.
  • Seattle-Tacoma International Airport (SEA), also called Sea-Tac, is the main airport for the greater Seattle metropolis. It is about 14 miles from downtown Seattle, and Alaska and Delta Airlines use it as a hub. Washington Dulles International Airport (IAD) is the main airport for the Washington DC area, where it is a United Airlines hub, and is located about 42 miles from downtown DC.
  • You could take one of the many non-stop flights from Seattle to Washington Dulles Airport, or you may prefer a flight with one or more stops. For example, Delta flies to IAD with stops in Detroit or New York City, and American Airlines can take you to DC via Chicago and Charlotte.
  • Flights from Washington Dulles Airport to Seattle average about 2,087 lbs. in CO2 emissions per passenger. If you would like to keep that number as low as possible, you could fly Alaska Air’s non-stop service, which ranges from only around 1,216 to 1,461 lbs. in emissions, about 42% to 30% less than the average.
  • You have two public transport options from downtown Seattle to the airport. The Link Light Rail costs about $3 a person, and you can get tickets at the station. The King County Metro Bus also has numerous routes from the city center to the airport for around $3 as well. You can pay the driver in cash, but you need exact change.
  • If you choose to drive and park your car at SEA, there are long-term parking lots at the airport. At the Terminal Direct parking on the 4th floor of the garage, you can walk to the main terminal from this floor for about $42 a day or around $294 a week. You can park on the other floors for around $34 a day or $169 per week.
See more tips

Prefer to fly non-stop from Seattle to Washington Dulles Airport?

Find which airlines fly direct from Seattle/Tacoma Intl to Dulles Intl, which days they fly and book direct flights.

Nonstop departures

Seattle/Tacoma Intl to Washington, D.C. Dulles Intl

Monday

ANA, Air Tahiti Nui, Alaska Airlines, +13 more

ANA, Air Tahiti Nui, +14 more

Tuesday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Wednesday

ANA, Air Tahiti Nui, Alaska Airlines, +13 more

ANA, Air Tahiti Nui, +14 more

Thursday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Friday

ANA, Air Tahiti Nui, Alaska Airlines, +14 more

ANA, Air Tahiti Nui, +15 more

Saturday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Sunday

ANA, Air Tahiti Nui, Alaska Airlines, +14 more

ANA, Air Tahiti Nui, +15 more

See more direct flights

Nonstop returns

Washington, D.C. Dulles Intl to Seattle/Tacoma Intl

Monday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

Tuesday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +13 more

Air Tahiti Nui, Alaska Airlines, +14 more

Wednesday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

Thursday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +13 more

Air Tahiti Nui, Alaska Airlines, +14 more

Friday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

Saturday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +13 more

Air Tahiti Nui, Alaska Airlines, +14 more

Sunday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

See more direct flights
See more direct flights

Top 4 airlines serving from Seattle to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9144 reviews
7.3Entertainment
8.2Boarding
7.9Comfort
8.6Crew
7.3Food
Airline reviews

They canceled my flight going back to SF after I was at the airport. Wanted me to take a flight 14 hours later. Not a happy camper.

2.0 MediocreRandy, May 2024SEA - SFO
Read more about Alaska Airlines reviews

They canceled my flight going back to SF after I was at the airport. Wanted me to take a flight 14 hours later. Not a happy camper.

Service was excellent. Staff at check in cleared hurdles for me so I could travel with my service animal.

Flight cancelled an hour before takeoff due to "unscheduled maintenance". New flight makes me have to wait for 5 hours in the airport, at a gate totally on the other side of where I'm at, requiring me to take a tram to get from the N terminal, to the C terminal. After waiting for 5 hours I'm informed my new flight is no longer at the gate I'm at, but instead is back in the N terminal where I was previously.

Delayed an hour and sat without updates. Ended up an hour late to destination

The flight was decent again if there was a place that you could put crying children that would be great. Or maybe make a rule against allowing infants on the plane.

Everything was fine -- on time, clear, clean. I don't want to pay extra for in-flight wi-fi

The flight was delayed because the pilots had not arrived on their previous flight yet. The flight was 100% full so it was pretty crowded. I miss having the screens on the back of the seats. It would be great if the Alaska planes had the clip so you can put your phone or tablet on the back of the seat in front of you to not strain your neck. Everything else was very smooth.

It was fine since it ensure we went to our destination in time.

I bought the cheapest ticket. No meal, no checked luggage so I didn't expect much and was surprised by how good the flight and service was. Alaska is now my favorite airline.

No entertainment, food was cookies & juice,water, soda or coffee.

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

All flights were on time and boarding was issue free

Water service would be great. The way they board is terrible. Slow passengers first😂😂 They need to smart up a bit

It got me where I needed it to; not much more. It had no competition so that was why I chose it.

Plane didn’t even make it off the ground. We all had to get off and walk to a different terminal (lots of confusion) to get on a different plane. Landed fairly late, connections missed.

Crowded flight, but upbeat and kind crew. Pilot greeted us at door, flight attendant thanked a number of “special” passengers for their business, another addressed an eight-year old boy as “young man.” United obviously trying to up their game, but though all of that is nice and notable, flying still feels like moving along a human assembly line, being herded into one small space after another (boarding areas with too few seats, planes with limited personal space, shuttles (IAD) packed too full.

It was ok until we got to DC and I wanted to use my United Club pass and the snobbish receptionist said that they don’t take one pass. It took me everything itch of patience not to tell her off

Food choice was poor and we had to buy on board snacks.

We were offer chocolate cookies , not everyone eat chocolate. Thank you

Lost luggage again. Our second trip to Mykonos, and 2nd time no luggage.

Flight was well orchestrated, made up time despite circling a bit all good on United. Travelers can just be so into themselves that common courtesy has gone out window for some, but that’s not on United.

Those seats were way too narrow. I had the middle seat, one person was a very skinny person and we still couldn’t avoid touching each other anytime one of us moved. The other person was larger and we were basically sitting in each others lap the entire flight. There was zero entertainment. The flight was long enough to justify tvs, but no. Gotta sit there in your infant seat and twiddle your thumbs.

The Flight attendant had an attitude and didn't allow anyone any time to prepare for landing despite being absent throughout the entire trip

The flight was great until towards the end when the flight attendant read an excessively long commercial for purchasing an american airlines credit card. The worst part is that we are doing a lot of traveling this year so i was actually interested in getting the credit card, but I was so annoyed with the long commercial that I completely dismissed the flight attendant bringing around the information. Next time, keep the sales pitch to 10 seconds and then pass around the brochures!!

Nice aircraft. Plane was PACKED full and distance between seats was tight. Had it been more than a two hour flight it would not have been tolerable. I had much more knee space on the JetBlue flight I went out on.

New ridiculous policy by american destroyed my allegiance to american. As a million miler with american, I expected it would be easy to get on an earlier flight when I got to airport earlier than expected, and save a five hour layover. WRONG. The online app would not let me switch flights, So I called, and was promised a call back in 90 minutes. HAH! The customer service desk at DCA said “we no longer have access to changing a flight on our screens. If the app couldn’t do it, I should send a letter to American, but there’s nothing else possible!”

I am tired of being nickel and dimed for seat location, checked luggage and carry on bags. That is why i rarely fly anymore.

I had the exit seat with all the leg room I could ask for. Great!

I wish there were no credit card announcements. I paid hundreds of dollars, I don't need to pay again by sitting through advertisements.

It was right on time and crew were very courteous

Great flight. Boarding was efficient and quick. On time departure and smooth flight. Flight arrived early at destination. Good experience.

Book cheap flights from Seattle to Washington, D.C.

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to Washington, D.C. found on KAYAK in the last 72 hours.
5/25Sat
1 stopSun Country Air
8h 37mSEA-IAD
$135
6/5Wed
nonstopDelta
5h 04mSEA-IAD
$139
9/11Wed
1 stopAmerican Airlines
7h 48mSEA-IAD
$144
8/20Tue
1 stopAmerican Airlines
8h 09mSEA-IAD
$146
6/4Tue
1 stopUnited Airlines
6h 56mSEA-IAD
$148
7/23Tue
1 stopUnited Airlines
7h 48mSEA-IAD
$150
6/5Wed
2 stops
15h 35mSEA-IAD
$160
7/12Fri
2 stops
20h 56mSEA-IAD
$166
8/12Mon
1 stopAlaska Airlines
18h 25mSEA-IAD
$210
7/9Tue
2 stopsAlaska Airlines
34h 05mSEA-IAD
$222

Search by stops

Search by airline

Search by price

Last minute flights from Seattle to Dulles Intl

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to Washington, D.C. that are departing in the next 10 days.
5/15Wed
multi-stop
14h 02mSEA-IAD
6/4Tue
nonstop
5h 30mIAD-SEA
$500
5/15Wed
multi-stop
14h 02mSEA-IAD
6/4Tue
multi-stop
8h 54mIAD-SEA
$509
5/15Wed
nonstopDelta
5h 09mSEA-IAD
6/4Tue
nonstopDelta
5h 49mIAD-SEA
$522
5/14Tue
multi-stopDelta
7h 25mSEA-IAD
6/4Tue
nonstopDelta
5h 47mIAD-SEA
$531
5/14Tue
multi-stopAmerican Airlines
10h 42mSEA-IAD
6/4Tue
multi-stopAmerican Airlines
10h 46mIAD-SEA
$586
5/14Tue
multi-stopAmerican Airlines
10h 42mSEA-IAD
6/4Tue
multi-stopAmerican Airlines
10h 38mIAD-SEA
$590
5/18Sat
multi-stopUnited Airlines
16h 17mSEA-IAD
5/25Sat
multi-stopUnited Airlines
12h 49mIAD-SEA
$647
5/18Sat
multi-stopUnited Airlines
25h 21mSEA-IAD
5/25Sat
multi-stopUnited Airlines
14h 42mIAD-SEA
$652
5/14Tue
nonstopAlaska Airlines
4h 56mSEA-IAD
5/22Wed
nonstopAlaska Airlines
5h 30mIAD-SEA
$745
5/17Fri
nonstopAlaska Airlines
4h 59mSEA-IAD
5/21Tue
nonstopAlaska Airlines
5h 30mIAD-SEA
$748

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Seattle - Washington Dulles Airport Flights

Departure:

Seattle (undefined)United States

Destination:

Washington Dulles Airport (IAD)United States

Return flight deals:

Washington Dulles Airport - Seattle

Cabin classes:

$225
$1,139
$534
$172