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IAD - SEA

Find cheap flights from Washington Dulles Airport to Seattle from $121

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Seattle departing on 4/22. 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
Thu 4/18
Thu 4/25

Search hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Seattle, 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 Washington, D.C. to Seattle, as well as popular online travel agencies
In the last 7 days travelers have searched 47,600,107 times on KAYAK, and here is why:

Save 20% 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 Dulles Intl to Seattle

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Seattle 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.
12:30 pm - 4:40 pmIAD-SEA
7h 10m1 stop
6:10 pm - 11:47 amSEA-IAD
14h 37m1 stop
$207Sun Country Air
Find Deal
Wed, Apr 17 - Sun, Apr 21
12:30 pm - 4:40 pmIAD-SEA
7h 10m1 stop
5:45 pm - 1:02 pmSEA-IAD
16h 17m1 stop
$236Sun Country Air
Find Deal
Wed, Apr 17 - Thu, Apr 18
7:30 am - 10:20 amIAD-SEA
5h 50mnonstop
10:30 pm - 6:25 amSEA-IAD
4h 55mnonstop
$257Delta
Find Deal
Wed, Apr 24 - Sun, May 5
5:30 pm - 8:18 pmIAD-SEA
5h 48mnonstop
4:47 pm - 6:33 amSEA-IAD
10h 46m1 stop
$262United Airlines
Find Deal
Tue, Apr 23 - Sat, Apr 27
7:00 am - 2:38 pmIAD-SEA
10h 38m1 stop
4:03 pm - 11:59 pmSEA-IAD
4h 56mnonstop
$266Alaska Airlines
Find Deal
Wed, Apr 24 - Mon, Apr 29
5:55 pm - 8:46 pmIAD-SEA
5h 51mnonstop
4:03 pm - 11:59 pmSEA-IAD
4h 56mnonstop
$267Alaska Airlines
Find Deal
Sat, Apr 27 - Mon, Apr 29
6:00 am - 11:06 amIAD-SEA
8h 06m1 stop
4:47 pm - 6:33 amSEA-IAD
10h 46m1 stop
$271United Airlines
Find Deal
Tue, Apr 9 - Fri, Apr 12
5:45 pm - 8:38 pmIAD-SEA
5h 53mnonstop
10:30 pm - 6:25 amSEA-IAD
4h 55mnonstop
$287Delta
Find Deal
Tue, Apr 16 - Mon, Apr 22
6:43 am - 2:57 pmIAD-SEA
11h 14m1 stop
12:59 am - 3:04 pmSEA-IAD
11h 05m2 stops
$295American Airlines
Find Deal
Tue, Apr 23 - Fri, Apr 26
2:12 pm - 10:10 pmIAD-SEA
10h 58m1 stop
12:59 am - 3:04 pmSEA-IAD
11h 05m2 stops
$328American Airlines
Find Deal
Sat, Apr 20 - Fri, Apr 26

Flights from Dulles Intl to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from Dulles Intl to Seattle 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 Washington Dulles Airport to Seattle?

The average price of all flights from Washington, D.C. Dulles Intl Airport to Seattle clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Seattle on a Wednesday and more expensive on a Sunday. On your return trip to Washington Dulles Airport, you should consider flying back on a Thursday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. Dulles Intl Airport to Seattle, 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 Washington, D.C. Dulles Intl Airport to Seattle is January, where tickets cost $257 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $588 and $538 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Washington, D.C. Dulles Intl Airport to Seattle, 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 Washington, D.C. Dulles Intl Airport to Seattle, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 26 days before departure.

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

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, Sun Country Air offered the best one-way deal for that route, at $121. KAYAK users also found Washington Dulles Airport to Seattle round-trip flights on Sun Country Air from $207 and on Delta from $257.

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

Alaska Airlines connects Washington Dulles Airport to Seattle up to 3 flights per day, followed by United Airlines (2 flights per day), and Delta (one flight per day).

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

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Washington, D.C. Dulles Intl Airport to Seattle.
There are 3 airlines that fly nonstop from Washington, D.C. Dulles Intl Airport to Seattle. They are: Alaska Airlines, Delta and United Airlines. The cheapest price of all airlines flying this route was found with Delta at $139 for a one-way flight. On average, the best prices for this route can be found at Delta.

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

Each day, there are between 6 and 10 nonstop flights that take off from Washington, D.C. Dulles Intl Airport and land in Seattle, with an average flight time of 5h 52m. The most common departure time is 5:00 pm and most flights take off in the afternoon. Each week, there are 53 flights. The most frequent day of departure is Thursday, when 19% of all weekly flights depart. The fewest flights depart on a Sunday.

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

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 Washington Dulles Airport to Seattle take?

The duration of a nonstop flight to Seattle from Washington Dulles Airport is typically 5h 30m. The journey crosses a distance of 2,299 miles.

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

Early birds can take the earliest flight from Washington, D.C. Dulles Intl Airport at 7:30 am and will be landing in Seattle at 10:20 am.

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

If you prefer to fly at night, the latest flight from Washington, D.C. Dulles Intl Airport to Seattle jets off at 7:09 pm and lands at 10:00 pm.

Good to know

Low season

January

High season

August

Cheapest flight

$121
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Washington Dulles Airport to Seattle

When to book flights from Dulles Intl to Seattle

Are your dates flexible? Find out the best times to travel from Dulles Intl to Seattle 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 Washington Dulles Airport to Seattle flights

  • How can I get from the Sea-Tac Airport (SEA) to my hotel in downtown Seattle?

    There are a few options to get you from the airport to your hotel in downtown Seattle. One option is the subway system that picks up passengers on the 4th floor of the parking garage. There are a couple of bus services at the Sea-Tac Airport. King County Metro travels to various parts of the city of Seattle while Sound Transit takes passengers to the outlining cities of Bellevue and Renton. The buses pick up by the subway station.

  • Where can I park my car long-term at the Washington Dulles Airport?

    Very close to the terminal, there is a parking garage and a terminal parking lot. There is also an economy lot a little further away. A shuttle service will take you from the economy lot to the main terminal of the airport.

  • What restaurants are at the Washington Dulles Airport?

    There are a couple of bars, a pizzeria, and a burger place where you can dine. Some well-known restaurants in this airport include Auntie Anne's, Carrabba's Italian Grill, Chick-Fil-A, and Jersey Mike's Subs.

  • What lounges are at these two airports?

    Both airports have lounges where you can enjoy some quiet time. These lounges also offer complimentary drinks and snacks. They are sponsored by airlines, credit card companies, or the airport. At the Washington Dulles Airport, there is a United Airlines, British Airways, and an Air France lounge. The Sea-Tac Airport has lounges affiliated with United Airlines, American Express, Delta Airlines, and Alaska Airlines.

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Seattle was $121 for a one-way ticket and $207 for a round-trip.

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

    A passport is not required to fly from Washington Dulles Airport to Seattle.

  • Which airports will I be using when flying from Washington Dulles Airport to Seattle?

    Washington Dulles Airport and Seattle are both served by 1 main airport. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and will be arriving at Seattle/Tacoma Intl.

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

    Alaska Airlines, American Airlines, Delta, and JetBlue offer inflight Wi-Fi service on the Washington Dulles Airport to Seattle flight route.

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Seattle are Alaska Airlines and Delta. With an average price for the route of $396 and an overall rating of 8.1, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $378 and an overall rating of 8.0.

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

    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 Washington Dulles Airport to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Washington Dulles Airport 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 Washington Dulles Airport to Seattle?

    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 Seattle with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and SEA 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 Washington Dulles Airport to Seattle?

    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 Seattle from Washington Dulles Airport 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 IAD to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $206 or less one-way and $362 or less round-trip.
  • You can book a nonstop flight from Washington Dulles Airport (IAD) to the Seattle-Tacoma International Airport (SEA). However, there are some flight routes that will require you to switch planes in either Salt Lake City, Dallas-Fort Worth, or San Francisco.
  • The Washington Dulles International Airport (IAD) has a simple layout. It has one main terminal that connects to four concourses from which departure and arrival flights are managed. To assist passengers with getting around, the airport is equipped with moving walkways, escalators, and elevators. It also has a people mover system that is known as the AeroTrain, it goes from one side of the airport to another.
  • The SEA underground makes it easy to get around the Seattle-Tacoma International Airport (SEA). This is a people mover system or tram that goes around the airport including the main terminal, the north terminal, the south terminal, and the four concourses.
  • There is lots to do and see at the Seattle-Tacoma International Airport. You can explore African culture in the Africa Lounge. Here you can enjoy African-inspired drinks and food. Throughout the year, the airport hosts live musical concerts. These concerts take place in the central terminal, in front of Sub Pop Records, and close to the children's play area.
  • Numerous rental car agencies have offices at the Sea-Tac Airport. This includes Budget, Dollar, Hertz, and Thrifty just to name a few. The rental car center is located offsite. However, there is a shuttle bus that will take you from the airport to the car rental lot.
See more tips

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

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

Nonstop departures

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

Monday

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

Air Tahiti Nui, Alaska Airlines, +14 more

Tuesday

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

Air Tahiti Nui, Alaska Airlines, +13 more

Wednesday

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

Air Tahiti Nui, Alaska Airlines, +14 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, +13 more

Air Tahiti Nui, Alaska Airlines, +14 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

Nonstop returns

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

Monday

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

Air Tahiti Nui, Alaska Airlines, +15 more

Tuesday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +16 more

Air Tahiti Nui, Alaska Airlines, +17 more

Wednesday

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

Air Tahiti Nui, Alaska Airlines, +15 more

Thursday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +16 more

Air Tahiti Nui, Alaska Airlines, +17 more

Friday

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

Air Tahiti Nui, Alaska Airlines, +16 more

Saturday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +16 more

Air Tahiti Nui, Alaska Airlines, +17 more

Sunday

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

Air Tahiti Nui, Alaska Airlines, +15 more

See more direct flights
See more direct flights

Top 5 airlines serving from Dulles Intl to Seattle

Need help choosing which airline to fly with from Dulles Intl to Seattle? 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 KAYAK reviews.
8.1
Alaska AirlinesOverall score based on 9147 reviews
83boarding
74entertainment
73food
81overall
86crew
79comfort
Airline reviews

we were late due to plane's late arrival at the gate and then there was a glitch with a button or something that had to be fixed and we waited for a tech to do that . The flight was very bumpy and totally not anything to do with the plane or crew. Just saying what was a bit miserable and kind of worrisome give then recent circumstances with the planes. Nothing fell off or onto anything during the flight of take off and landing so I count myself lucky to have gotten to my destination there and back safely. Thank you for asking

Read more about Alaska Airlines

we were late due to plane's late arrival at the gate and then there was a glitch with a button or something that had to be fixed and we waited for a tech to do that . The flight was very bumpy and totally not anything to do with the plane or crew. Just saying what was a bit miserable and kind of worrisome give then recent circumstances with the planes. Nothing fell off or onto anything during the flight of take off and landing so I count myself lucky to have gotten to my destination there and back safely. Thank you for asking

I'm a tall guy. Fortunately I was able to find seating in the emergency rows that gave me a couple more inches of room. My return flight a few days later, I wasn't as fortunate. Very painfully and uncomfortable return flight.

Flight was smooth but to many screaming and crying young toddlers who wouldn't stop crying and screaming at the top of there lungs it gave me a bad headache.

They misplaced our 1 bag and that messed up our reservation for the following day of fun and we paid extra 100 for the bag. Not fun

Crew was friendly and professional. Offered multiple drink services. Handled this full flight with style and grace.

Horrible, missed my connecting flight because Alaska did not give me enough time

Great crew. Uncomfortable cramped seats. Crappy snacks. But on schedule and no doors blew off.

Everything was great until one of my 4 checked bags didn’t make it with me. Baggage staff at OAK were not especially congenial the first night. Got my phone number wrong so they couldn’t reach me via phone. I was able to pick my bag up within about an hour of when I initially wanted to. Wendy was very helpful.

I was on a ski vacation and traveled between Pittsburgh and Big Sky, Montana via Seattle I was very disappointed that I couldn't reserve a seat between Seattle and Big Sky ahead of time and angry that I had to pay a fee to get a seat (both ways) when I checked in online. Why couldn't I select a seat ahead of time for that leg of the fight? The flight itself was fine and the seat was comfortable. On arrival back in Pittsburgh, I waited over an hour for my skis to arrive after I retrieved by boot bag from the carousel. This was my first experience on Alaska Airline and it was disappointing.

One of their flight attendants made a rude comment as I deboarded the plane. Definitely won’t be flying with them again.

Standard economy seats on Deltas 767 were better than Alaska premium seats on their 737 MAX9; more legroom, wider seats. Entertainment was great, no ipad or phone required. Could have included a meal service.

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Flight was on time, the crew was personable & professional, & the plane arrived early which was nice.

This flight landed early, but deplaned late. We were stuck sitting and waiting for a gate for over an hour

My flight was very clean and the location was comfortable. The service was great. A satisfying flight!

Really liked the choice of the 4 free snack options. Crew great. Good vibe on plane.

More filling food and more entertainment options would be cool.

There was no wifi even after my husband paid for wifi it wasn’t working. The plane looked and felt old.

Flight and seats were great. Food service was average at best. The real main problem we had is that we got cheeseburgers for the kids but the plates was extremely hot. Like ridiculously hot and the stewardess never said anything. Luckily or unluckily my wife touched the plate and was able to deal with it before the kids got burned.

Our flight was delayed many times throughout the day. The final delay was about 8 hours. I spent time in line to speak to someone at their understaffed desk, and also spent time waiting online and then chatting with a service rep. None of the United employees were any help at all. I desperately wanted to go get rest and possibly re-book my trip but I was denied any compensation or voucher for a hotel. I was repeatedly told it was not United's fault and therefore they had no compensation to offer. Overall, a cold and callous experience.

Flight crew and pilots did great. Flight way delayed due to a part needing replacement. Based on what the pilot indicated- the maintenance crew could’ve resolved this more efficiently than replacing whole part- and taken less time

The most cramped seating I’ve ever experienced, (including budget airlines) with no food available for purchase on a nearly 6 hour flight.

Flight was canceled do to mechanical failure I lost my connection flight at to pay $2500.00 more to get 4 more tickets to fly to Ketchikan Alaska This was the worst experience I had flying. I thinks kayak should pay for my new ticket from Seattle to Ketchikan That may bring less pain from my trip Thanks Ilir

Just a crappy airline. The same every time. You feel you are a cow on a farm. You are being being whipped and pulled.

Wasn’t very crowded. Seamless processes. No issues traveling with two little kids.

My interaction with the flight attendent Eve was horrible. I was seated in 3F and was blown away watching her repeatedly skip me as she took other customer orders for lunch...she took the customer next to me but skipped me, then took everyone's order around me (in front of and behind me) . After she had taken every customer's orders to include those behind me, she came to me and said we are out of everything except one last item. I was mortified, in that, I am a 1k flyer, had pre-ordered AND as an African American could only assume why she repeatedly skipped me...mortified. no words

The Flight was good, pilot seemed very skillful. My wheel chair sister who could barely walk was allotted the second last seat in the aircraft, with great difficulty she managed to reach on her seat, as she required attendance we were given separate seat, even on request no one cared, so much so there were single passengers who were given twin seats. May not be taken as complaint but a reminder to the checkin staff to keep in mind in future the allottment of wheel chair passengers seats.

Almost 2 hour delay in boarding with all standing ready to board at original time. No explanation given.

787-9 Transcon from IAD-LAX FYI no meals in premium plus, not considered Premium - seats are wonderful https://www.united.com/ual/en/us/fly/travel/inflight/premium-services.html Horrible handling of delayed flight

Everything was on time; the flight attendants and the gate personnel were very pleasant and helpful.

I had trouble finding a boarding pass because I had an hour between Flights and American did not see my flight I believe because I was ticketed through KAYAK. I did not have enough time to go to the desk before boarding so I went to the desk and told them while I was boarding and they had a boarding pass for me within three minutes. Nice. I paid extra to have more legroom and it is definitely worth it for a six hour flight. I would’ve paid for a decent dinner, but they didn’t offer anything but a snack box —not good for six hours.

Our second leg to Jackson WY was unable to land due to weather. We were flown back to Dallas after stopping in SLC. We were given hotel rooms and vouchers. We were told that we would be back on the same plane in the morning. Instead we were given a different flight with different seats. Not a good experience. No one knew what was going on.

Perfect flight. On time departure and early arrival. Smooth flight.

Awful! The flight was delayed and we sat on the plane in DCA for an hour because fuel was out in the wrong part of the plane and would not be accessible during flight. So the plane had to be refueled in correct tank. They also allowed someone to get off of the plane. This delayed my six hour flight by an hour and made me miss my connecting flight. I ran to new gate and American Airlines agents new about the delay and even knew that I was trying to make the connection. They knew thru communication with my friend while in flight that I was in the airport and running to the new gate and they still closed the gate and refused to let me on the new flight despite plane still being at the gate. It was horrible and I had to be rebooked on a flight for 24 hours later. This has been a nightmare and if American Airlines can cause customers to be delayed and then have zero empathy as having an on time flight was more important to them than helping a customer who was delayed by no fault of her own, then it's seems that it's not a company that I want to continue to give my loyalty to. I'm so disgusted.

Help was available but timing was bad in my case

It was a horrible snow storm, but updates were inconsistent and the app never displayed a remotely accurate time or gate until very close to boarding.

The flight was so short that the lack of leg room didn't bother me for long. The plane was smaller so only two seats per row and there were chargers. However, they didn't serve any snacks.

Staff were very helpful to my dad in a wheelchair. Thank you.

Terrible flight seats where really uncomfortable I had body aches for 2 days and flight was delays almost two hours

There was no wifi, there was no usb charger on the planes Frontier lowered the weight limit on suitcases from 50 to 40 pounds Frontier now charges for a seat...really? If i don't pay for a basic seat, do i stand the whole flight? Frontier now charges for the carry on, just like for the checked suitcase The bundle pricing is way over priced.

I am HIGHLY unhappy with the amount of money I spent on the flight. Paid in advance only to find the flight at a discount price a week or so before the flight. I will not fly frontier again and have bad mouthed your business since to anyone I have spoken with about flying (which has been many a people). Crew was mediocre and instead of moving me to a spot where I could gain some leg room they sat their flight attendant there. Won’t be flying frontier in the future.

They changed my flight and did not want to accommodate me or try to help me in any way. They do not care about their customers.

Plane was clean but they do not allow bag drop until 1 hour before flight. Just encouraging late fees and other issues. The worst I have experienced. Total hostage situation, pay or you miss your flight.

Everything was good, 20/30 minutes late waiting on a crew member. It’s hard to keep employees. Or serious employees I know. I remember one flight from Houston of Frontiers was almost 18 hours late. And another 4 hours late very poor. But I would rather be late and safe than the on the news. Thank you.

Well, I didn’t have food! So NA wasn’t an option. I’ll be back!

Bought seats on the flight and they were supposed to be 2 and a jumpseat. Plane clearly changed and it was a regular 3 seat row. Asked for a refund and was denied. If I wanted to sit next to someone else I wouldn't have bought the seats..

I dunno. Depressing, uncomfortable (I’m poor), but on time and efficient.

Everything was good, and most importantly on time. They have been extremely tardy in some of my flights

First time flying with Frontier . From buying tickets ,getting boarding pass and boarding plane was super easy. Definitely would fly again with Frontier .

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

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Seattle found on KAYAK in the last 72 hours.
4/22Mon
1 stopSun Country Air
7h 35mIAD-SEA
$121
4/20Sat
nonstopDelta
5h 53mIAD-SEA
$129
4/10Wed
1 stopUnited Airlines
12h 03mIAD-SEA
$138
4/19Fri
nonstopAlaska Airlines
5h 51mIAD-SEA
$145
5/11Sat
1 stopUnited Airlines
9h 53mIAD-SEA
$148
4/22Mon
2 stops
24h 04mIAD-SEA
$150
4/3Wed
2 stops
12h 59mIAD-SEA
$153
5/9Thu
1 stopAlaska Airlines
10h 08mIAD-SEA
$154
4/20Sat
1 stopAmerican Airlines
10h 58mIAD-SEA
$187
5/11Sat
2 stopsAmerican Airlines
10h 38mIAD-SEA
$232

Search by stops

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Last minute flights from Dulles Intl to Seattle

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 Washington, D.C. to Seattle that are departing in the next 10 days.
3/20Wed
multi-stopAmerican Airlines
9h 28mIAD-SEA
3/27Wed
multi-stopAmerican Airlines
7h 17mSEA-IAD
$594
3/20Wed
multi-stopAmerican Airlines
12h 58mIAD-SEA
3/25Mon
multi-stopAmerican Airlines
8h 21mSEA-IAD
$598
3/21Thu
multi-stop
27h 26mIAD-SEA
3/25Mon
multi-stop
22h 39mSEA-IAD
$602
3/20Wed
multi-stop
23h 06mIAD-SEA
3/27Wed
multi-stop
21h 06mSEA-IAD
$675
3/24Sun
nonstopAlaska Airlines
6h 00mIAD-SEA
3/27Wed
nonstopAlaska Airlines
5h 00mSEA-IAD
$677
3/21Thu
multi-stopDelta
7h 40mIAD-SEA
3/26Tue
nonstopDelta
4h 59mSEA-IAD
$686
3/21Thu
multi-stopDelta
7h 40mIAD-SEA
3/26Tue
multi-stopDelta
8h 49mSEA-IAD
$696
3/21Thu
multi-stopUnited Airlines
8h 26mIAD-SEA
3/30Sat
multi-stopUnited Airlines
8h 53mSEA-IAD
$724
3/23Sat
nonstopAlaska Airlines
6h 00mIAD-SEA
3/30Sat
nonstopAlaska Airlines
5h 00mSEA-IAD
$727
3/21Thu
multi-stopUnited Airlines
8h 26mIAD-SEA
3/29Fri
nonstopUnited Airlines
4h 55mSEA-IAD
$729

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Washington Dulles Airport - Seattle Flights

Departure:

Washington Dulles Airport (IAD)United States

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Washington Dulles Airport

Cabin classes:

$558
$1,082
$419
$203