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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 Cheapflights user in the last 72 hours by searching for a flight departing on 20/8. 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.
IAD — SEA
27 May — 3 Jun1
1 adult
Mon 27/5
Mon 3/6

Cheap flight deals from Dulles Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 May 2024.

Popular in

June

Cheapest in

January

Round-trip from

£453

One-way from

£180
High demand for flights, 20% potential price rise
Search Deals
Best time to find cheap flights, 10% potential price drop
Search Deals
From Washington, D.C. Dulles Intl to Seattle/Tacoma Intl
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One-way flight from Washington, D.C. Dulles Intl to Seattle/Tacoma Intl
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How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Seattle?

Users have found that booking a flight from Washington, D.C. Dulles Intl Airport to Seattle at least 53 days early can save you up to 61% on average compared to booking a flight this week. If booking 53 days before your flight isn’t an option for you, users have found flights from Washington, D.C. Dulles Intl Airport to Seattle for as little as £371 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £427 for flights departing within the next 3 days.

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

Our data shows that January tends to be the cheapest month to fly to Seattle from Washington, D.C. Dulles Intl Airport. Users have commonly found prices around £320 for the month, but tickets can be as low as £109. Due to multiple factors, prepare for potentially higher prices in June.

When is the cheapest time to fly from Washington, D.C. Dulles Intl Airport to Seattle (IAD - SEA)?

When flying from Washington, D.C. Dulles Intl Airport to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap Alaska Airlines flights from Dulles Intl to Seattle

Explore cheap flight options specifically provided by Alaska Airlines for the route between Dulles Intl and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 858,538 searches. Data last updated 22 May 2024.
Peruse some of the lowest-priced Alaska Airlines flights we've found from Washington, D.C. to Seattle. Make sure to double check the flight details before booking.
Tue 17/907:00IAD - SEA
Nonstop5h 39mAlaska Airlines
Wed 25/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 21/5£218
Wed 18/916:16IAD - SEA
1 stop10h 26mAlaska Airlines
Tue 24/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 21/5£225
Mon 19/807:10IAD - SEA
1 stop9h 50mAlaska Airlines
Sat 31/807:07SEA - IAD
Nonstop5h 08mAlaska Airlines
Deal found 21/5£229
Thu 4/716:16IAD - SEA
1 stop10h 28mAlaska Airlines
Wed 10/723:43SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 21/5£234
Sun 8/918:03IAD - SEA
1 stop8h 39mAlaska Airlines
Sat 14/906:00SEA - IAD
1 stop8h 53mAlaska Airlines
Deal found 21/5£237
Thu 5/916:16IAD - SEA
1 stop10h 26mAlaska Airlines
Thu 12/1209:36SEA - IAD
1 stop8h 54mAlaska Airlines
Deal found 21/5£242
Wed 18/916:13IAD - SEA
Nonstop5h 46mAlaska Airlines
Fri 27/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 21/5£249
Tue 10/916:13IAD - SEA
Nonstop5h 46mAlaska Airlines
Tue 24/917:42SEA - IAD
1 stop19h 51mAlaska Airlines
Deal found 22/5£251
Thu 19/919:09IAD - SEA
Nonstop5h 51mAlaska Airlines
Fri 27/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 21/5£254

Cheap Delta flights from Dulles Intl to Seattle

Explore cheap flight options specifically provided by Delta for the route between Dulles Intl and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 858,538 searches. Data last updated 22 May 2024.
To aid your search, here are some of the cheapest Delta flights we've found from Washington, D.C. to Seattle. Deals are refreshing constantly so come back soon for more options.
Wed 21/807:00IAD - SEA
Nonstop5h 34mDelta
Mon 26/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 21/5£222
Thu 31/1007:50IAD - SEA
Nonstop5h 54mDelta
Mon 4/1122:00SEA - IAD
Nonstop4h 56mDelta
Deal found 21/5£227
Sat 21/907:50IAD - SEA
Nonstop5h 54mDelta
Sat 21/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 21/5£241
Tue 13/807:00IAD - SEA
Nonstop5h 34mDelta
Wed 21/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 21/5£246
Sat 21/917:20IAD - SEA
Nonstop5h 52mDelta
Sat 28/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 21/5£265
Mon 15/707:30IAD - SEA
Nonstop5h 47mDelta
Fri 19/721:59SEA - IAD
Nonstop4h 57mDelta
Deal found 21/5£270
Sun 15/906:10IAD - SEA
1 stop19h 05mDelta
Sat 21/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 21/5£288
Sat 24/817:50IAD - SEA
Nonstop5h 47mDelta
Mon 2/922:00SEA - IAD
Nonstop5h 05mDelta
Deal found 21/5£288
Tue 11/606:22IAD - SEA
1 stop17h 15mDelta
Wed 19/621:55SEA - IAD
Nonstop5h 05mDelta
Deal found 21/5£292

Cheap Dulles Intl to Seattle flights in May & June 2024

Find cheap flight options from Dulles Intl to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 858,538 searches. Prices were last updated on 22 May 2024.
Scroll through some of the best deals on flights from Washington, D.C. to Seattle in 2024. Check back in a little while for more flight options.
Wed 12/611:16IAD - SEA
1 stop8h 26mSun Country Air
Thu 20/623:59SEA - IAD
1 stop10h 38mSun Country Air
Deal found 22/5£224
Wed 5/611:20IAD - SEA
1 stop23h 42mSun Country Air
Mon 10/618:15SEA - IAD
1 stop13h 22mSun Country Air
Deal found 22/5£232
Wed 12/611:16IAD - SEA
1 stop8h 26mSun Country Air
Fri 21/623:59SEA - IAD
1 stop8h 45mSun Country Air
Deal found 22/5£248
Tue 11/607:00IAD - SEA
Nonstop5h 30mAlaska Airlines
Tue 18/623:38SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 21/5£249
Mon 10/610:50IAD - SEA
1 stop9h 18mSun Country Air
Thu 20/623:59SEA - IAD
1 stop10h 38mSun Country Air
Deal found 22/5£251
Mon 3/617:25IAD - SEA
1 stop20h 15mSun Country Air
Mon 10/609:07SEA - IAD
1 stop22h 30mSun Country Air
Deal found 22/5£255
Mon 10/610:50IAD - SEA
1 stop9h 18mSun Country Air
Mon 24/623:59SEA - IAD
1 stop7h 31mSun Country Air
Deal found 22/5£259
Mon 3/617:25IAD - SEA
1 stop20h 15mSun Country Air
Thu 13/623:59SEA - IAD
1 stop9h 58mSun Country Air
Deal found 22/5£263
Wed 12/607:00IAD - SEA
1 stop9h 57mAlaska Airlines
Tue 2/723:38SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 22/5£269

Dulles Intl to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Dulles Intl and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 858,538 searches. Data last updated 22 May 2024.
Scroll through some of the best deals on flights from Washington, D.C. to Seattle in 2024. Check back in a little while for more flight options.
Tue 17/907:50IAD - SEA
Nonstop5h 54mDelta
Sat 21/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 21/5£218
Wed 21/807:00IAD - SEA
Nonstop5h 34mDelta
Mon 26/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 22/5£222
Wed 12/611:16IAD - SEA
1 stop8h 26mSun Country Air
Thu 20/623:59SEA - IAD
1 stop10h 38mSun Country Air
Deal found 22/5£224
Wed 18/916:16IAD - SEA
1 stop10h 26mAlaska Airlines
Wed 25/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 22/5£225
Wed 4/1217:20IAD - SEA
Nonstop5h 52mDelta
Sat 7/1222:00SEA - IAD
Nonstop4h 56mDelta
Deal found 22/5£227
Mon 16/917:57IAD - SEA
1 stop8h 45mAlaska Airlines
Tue 24/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 21/5£229
Wed 5/611:20IAD - SEA
1 stop23h 42mSun Country Air
Mon 10/618:15SEA - IAD
1 stop13h 22mSun Country Air
Deal found 22/5£232
Thu 4/716:16IAD - SEA
1 stop10h 28mAlaska Airlines
Thu 18/723:43SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 22/5£234
Mon 8/712:33IAD - SEA
1 stop25h 39mSun Country Air
Mon 15/723:59SEA - IAD
1 stop10h 11mSun Country Air
Deal found 22/5£240

Direct flights to Seattle from Dulles Intl

Discover direct flight options from Dulles Intl to Seattle. Find direct flights with no stopovers, providing a convenient travel experience. Explore direct flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 858,538 searches. Data last updated 22 May 2024.
If you're seeking options on non-stop flights from Washington, D.C. to Seattle, check out these fares. If you're looking for other options for flights from Washington, D.C. to Seattle, make sure to update the search form at the top of page.
Tue 17/917:20IAD - SEA
Nonstop5h 52mDelta
Wed 25/908:05SEA - IAD
Nonstop5h 06mDelta
Deal found 21/5£218
Wed 21/807:00IAD - SEA
Nonstop5h 34mDelta
Mon 26/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 21/5£222
Thu 31/1007:50IAD - SEA
Nonstop5h 54mDelta
Mon 4/1122:00SEA - IAD
Nonstop4h 56mDelta
Deal found 21/5£227
Sat 21/907:50IAD - SEA
Nonstop5h 54mDelta
Sat 21/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 21/5£241
Tue 13/807:00IAD - SEA
Nonstop5h 34mDelta
Tue 20/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 22/5£246
Wed 18/907:00IAD - SEA
Nonstop5h 39mAlaska Airlines
Fri 27/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 22/5£249
Thu 19/919:09IAD - SEA
Nonstop5h 51mAlaska Airlines
Thu 26/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 21/5£254
Sat 21/917:20IAD - SEA
Nonstop5h 52mDelta
Sat 28/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 21/5£265
Thu 29/807:00IAD - SEA
Nonstop5h 39mAlaska Airlines
Sat 31/807:07SEA - IAD
Nonstop5h 08mAlaska Airlines
Deal found 22/5£267

Dulles Intl to Seattle flights leaving soon

Find last-minute flight options from Dulles Intl to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 858,538 searches. Data last updated 22 May 2024.
Users seeking a last-minute flight from Washington, D.C. to Seattle should consider booking one of these fares. To prevent any unwanted surprises, users should verify their flight info before booking.
Wed 29/517:39IAD - SEA
Nonstop5h 46mDelta
Thu 8/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 22/5£365
Wed 29/509:05IAD - SEA
Nonstop5h 30mAlaska Airlines
Wed 7/807:00SEA - IAD
1 stop8h 36mAlaska Airlines
Deal found 22/5£372
Wed 29/506:00IAD - SEA
1 stop7h 32mDelta
Thu 8/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 22/5£372
Thu 30/511:25IAD - SEA
1 stop8h 35mSun Country Air
Tue 4/611:45SEA - IAD
1 stop19h 36mSun Country Air
Deal found 22/5£377
Wed 29/518:05IAD - SEA
1 stop8h 54mAlaska Airlines
Wed 7/807:00SEA - IAD
1 stop8h 36mAlaska Airlines
Deal found 22/5£380
Thu 30/511:25IAD - SEA
1 stop8h 35mSun Country Air
Wed 5/617:15SEA - IAD
1 stop14h 58mSun Country Air
Deal found 22/5£385
Fri 31/518:10IAD - SEA
Nonstop5h 40mAlaska Airlines
Thu 13/623:38SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 22/5£391
Fri 31/507:00IAD - SEA
1 stop9h 57mAlaska Airlines
Thu 13/623:38SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 22/5£398
Fri 31/522:08IAD - SEA
1 stop12h 49mUnited Airlines
Thu 13/623:59SEA - IAD
1 stop6h 56mUnited Airlines
Deal found 22/5£413

One-way flights to Seattle from Dulles Intl

Search for one-way flight options from Dulles Intl to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 858,538 searches. Data last updated 22 May 2024.
Users travelling one-way from Washington, D.C. to Seattle can select one of these great deals. Users in need of a round-trip flight from Washington, D.C. to Seattle instead should update the search form at the top of page.
Tue 20/807:00IAD - SEA
Nonstop5h 34mDelta
Deal found 21/5£109
Tue 13/807:00IAD - SEA
Nonstop5h 34mDelta
Deal found 22/5£114
Mon 22/719:05IAD - SEA
1 stop24h 54mSun Country Air
Deal found 21/5£120
Thu 4/716:16IAD - SEA
1 stop10h 28mAlaska Airlines
Deal found 21/5£121
Mon 3/617:25IAD - SEA
1 stop20h 15mSun Country Air
Deal found 21/5£128
Tue 9/712:00IAD - SEA
1 stop7h 59mSun Country Air
Deal found 21/5£132
Sat 24/817:50IAD - SEA
Nonstop5h 47mDelta
Deal found 22/5£133
Thu 11/712:07IAD - SEA
1 stop23h 05mSun Country Air
Deal found 22/5£136
Mon 14/1019:06IAD - SEA
Nonstop5h 54mAlaska Airlines
Deal found 21/5£141

Find flights from Dulles Intl to Seattle within your budget

Customise your flight search to find flights from Dulles Intl to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,538 searches. Data last updated 22 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

£218 - £301

Route

Depart

Return

Price

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Tue 17/9

Nonstop5h 39m

Seattle/Tacoma Intl

Wed 25/9

Nonstop4h 53m

£218

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 21/8

Nonstop5h 34m

Seattle/Tacoma Intl

Mon 26/8

Nonstop5h 05m

£222

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 12/6

1 stop8h 26m

Seattle/Tacoma Intl

Thu 20/6

1 stop10h 38m

£224

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 18/9

1 stop10h 26m

Seattle/Tacoma Intl

Tue 24/9

Nonstop4h 53m

£225

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 31/10

Nonstop5h 54m

Seattle/Tacoma Intl

Mon 4/11

Nonstop4h 56m

£227

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Mon 19/8

1 stop9h 50m

Seattle/Tacoma Intl

Sat 31/8

Nonstop5h 08m

£229

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 5/6

1 stop23h 42m

Seattle/Tacoma Intl

Tue 11/6

1 stop14h 06m

£232

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 15/8

1 stop13h 40m

Seattle/Tacoma Intl

Fri 23/8

1 stop17h 57m

£240

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 23/8

Nonstop5h 48m

Seattle/Tacoma Intl

Tue 3/9

Nonstop5h 05m

£301

Flights are sorted by cheapest first

Deals found on 21/5

When is the best time to book a flight from Washington, D.C. Dulles Intl Airport to Seattle?

Use this chart to determine the optimal time to book a return flight from Dulles Intl to Seattle. Price data was last updated on 10 May 2024.
The best time to book flights from Washington, D.C. Dulles Intl Airport to Seattle is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

Best time to book a flight from Dulles Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Dulles Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

5 - 19 °C

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 22 May 2024.
See what other customers who have flown with Alaska Airlines, Delta and Sun Country Air from Washington, D.C. to Seattle have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very Good
6,004 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.8

Food

7.3

Overall

8.2

Comfort

8.1

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Southwest
8.2
Very Good
6,004 reviews
Southwest
8.2
Very Good
6,004 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.8

Food

7.3

Overall

8.2

Comfort

8.1

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Alaska Airlines
8.1
Very Good
9,171 reviews
Southwest
8.2
Very Good
6,004 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.8

Food

7.3

Overall

8.2

Comfort

8.1

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Delta
8.0
Very Good
10,585 reviews
Southwest
8.2
Very Good
6,004 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.8

Food

7.3

Overall

8.2

Comfort

8.1

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

United Airlines
7.4
Good
10,852 reviews
Southwest
8.2
Very Good
6,004 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.8

Food

7.3

Overall

8.2

Comfort

8.1

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Sun Country Air
7.2
Good
609 reviews
Southwest
8.2
Very Good
6,004 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.8

Food

7.3

Overall

8.2

Comfort

8.1

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Washington, D.C. Dulles Intl?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 13 daily inbound flights from Washington, D.C. Dulles Intl from 0 different airlines.

  • Can I find flights from Washington, D.C. Dulles Intl Airport to Seattle for under £300 on Cheapflights?

    Yes, there are multiple flights from Washington, D.C. Dulles Intl Airport to Seattle for under £300. The cheapest flight booked recently is on Alaska Airlines for just £218, but on average you can expect to pay £239.

  • Are there nonstop flights from Washington, D.C. Dulles Intl Airport to Seattle for under £300 on Cheapflights?

    Cheapflights has at least 20 direct flights from Washington, D.C. Dulles Intl Airport to Seattle under £300. A good price for a nonstop flight from Washington, D.C. Dulles Intl Airport to Seattle is less than £268.

  • Are there last-minute flights available from Washington, D.C. Dulles Intl Airport to Seattle for under £400?

    There are currently 20+ open flights from Washington, D.C. Dulles Intl Airport to Seattle within the next 7 days for less than £400.

  • What days are direct flights available from Washington, D.C. Dulles Intl Airport to Seattle?

    You can find direct flights on the following days: Sunday, Wednesday, Thursday, Friday, Saturday.

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

    On average, you can expect to see 12 flights from Washington, D.C. Dulles Intl Airport to Seattle a day.
    Morning (6am - Midday) - 75% of flight departures
    Afternoon (Midday - 6pm) - 17% of flight departures
    Evening (6pm - Midnight) - 8% of flight departures

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

    Alaska Airlines, Delta, and Sun Country Air can get you from Washington, D.C. Dulles Intl Airport to Seattle in just under 5h 34m. Your travel time can differ by up to 2h 52m. The distance from Washington, D.C. Dulles Intl Airport to Seattle is about 2313 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Seattle is Alaska Airlines. Our recent data shows that you can find tickets from as low as £218 on this airline. Additional options worth looking into are Delta and Sun Country Air, starting at £222 and £224 round-trip. Alaska Airlines is 28% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as £109. However, be on the lookout for offers from Sun Country Air and Alaska Airlines, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Seattle for a low price.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Seattle?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Seattle are Japan Airlines (90%), United Airlines (87%) and Air Tahiti Nui (85%).

  • What does IAD to SEA mean?

    Great question - IAD to SEA just means Washington, D.C. Dulles Intl Airport to Seattle/Tacoma Intl Airport. Now you’ll know what these unique codes when you look for flights!

  • Can I find deals for flights from Dulles Intl to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your Dulles Intl to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Dulles Intl to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Dulles Intl to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Dulles Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Seattle.

  • Can I find deals for business class flights from Dulles Intl to Seattle?

    Yes. Cheapflights offers flight deals from Dulles Intl to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Dulles Intl to Seattle that allow pets onboard?

    Many airlines flying from Dulles Intl to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Dulles Intl to Seattle?

    Yes, you can often find last-minute deals on Dulles Intl to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Washington, D.C. Dulles Intl Airport to Seattle flight deals updated?

    The Washington, D.C. Dulles Intl Airport to Seattle flight deals you see on this page were last updated on 22/5.

  • When is the best time to book a flight from Washington, D.C. Dulles Intl Airport to Seattle?

    Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Seattle (average of £576). Flying from Washington, D.C. Dulles Intl Airport to Seattle in July is currently the most expensive (average of £805). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Search flights from Dulles Intl to Seattle by cabin class

Find flights from Dulles Intl to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Dulles Intl to Seattle

Find hourly flight availability from Dulles Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 May 2024.
1%of flight departuresEarly morningMidnight to 6 am
53%of flight departuresMorning6 am to noon
35%of flight departuresAfternoonNoon to 6 pm
11%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Midday
6 PM

Weekly flight availability from Dulles Intl to Seattle

Explore weekly flight availability from Dulles Intl to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 22 May 2024.
Monday14daily flights
Tuesday11daily flights
Wednesday13daily flights
Thursday12daily flights
Friday15daily flights
Saturday14daily flights
Sunday14daily flights

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How does Cheapflights help users find flights from Dulles Intl to Seattle?

When you search for this flight from Dulles Intl to Seattle, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Seattle?

Cheapflights simply makes it quick and affordable to book flights from Dulles Intl to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Dulles Intl to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Dulles Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Dulles Intl to Seattle become cheaper?

Yes, Cheapflights offers price alerts on Dulles Intl to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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