$124 Cheap flights from Seattle - Tacoma Intl. to Washington Dulles Intl. (SEA to IAD)

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Find The Best Dates To Fly from Seattle - Tacoma Intl. to Washington Dulles Intl.

Compare Flight Prices from Seattle to Washington

Affordable Airfare Tickets from SEA to IAD Airport

The cheapest flights to Washington Dulles Intl. found within the past 7 days were $190 round trip and $124 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Jan 21 - Wed, Jan 28
SEA
Seattle
IAD
Washington
$190 Roundtrip, found 4 days ago
$190
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Jan 21 from Seattle to Washington, returning Wed, Jan 28, priced at $190 found 4 days ago
Sat, Oct 18 - Sat, Oct 25
SEA
Seattle
IAD
Washington
$194 Roundtrip, found 4 days ago
$194
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Oct 18 from Seattle to Washington, returning Sat, Oct 25, priced at $194 found 4 days ago
Thu, Dec 11 - Tue, Jan 27
SEA
Seattle
IAD
Washington
$204 Roundtrip, found 4 days ago
$204
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Dec 11 from Seattle to Washington, returning Tue, Jan 27, priced at $204 found 4 days ago
Tue, Oct 28 - Wed, Oct 29
SEA
Seattle
IAD
Washington
$209 Roundtrip, found 4 days ago
$209
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, Oct 28 from Seattle to Washington, returning Wed, Oct 29, priced at $209 found 4 days ago
Tue, Oct 28 - Tue, Nov 11
SEA
Seattle
IAD
Washington
$213 Roundtrip, found 5 days ago
$213
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Oct 28 from Seattle to Washington, returning Tue, Nov 11, priced at $213 found 5 days ago
Sat, Nov 8 - Sat, Nov 15
SEA
Seattle
IAD
Washington
$213 Roundtrip, found 4 days ago
$213
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Nov 8 from Seattle to Washington, returning Sat, Nov 15, priced at $213 found 4 days ago
Tue, Jan 13 - Tue, Jan 13
SEA
Seattle
IAD
Washington
$213 Roundtrip, found 4 days ago
$213
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Jan 13 from Seattle to Washington, returning Tue, Jan 13, priced at $213 found 4 days ago
Thu, Oct 23 - Thu, Oct 30
SEA
Seattle
IAD
Washington
$221 Roundtrip, found 4 days ago
$221
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Oct 23 from Seattle to Washington, returning Thu, Oct 30, priced at $221 found 4 days ago
Tue, Oct 21 - Wed, Oct 22
SEA
Seattle
IAD
Washington
$223 Roundtrip, found 4 days ago
$223
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Oct 21 from Seattle to Washington, returning Wed, Oct 22, priced at $223 found 4 days ago
Wed, Oct 29 - Mon, Nov 3
SEA
Seattle
IAD
Washington
$227 Roundtrip, found 6 days ago
$227
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 29 from Seattle to Washington, returning Mon, Nov 3, priced at $227 found 6 days ago

Washington Dulles Intl. flight + hotel packages - economy flights

Price found within the past 48 hours. Click for updated prices.
Hilton Garden Inn Washington DC/U.S. Capitol

Hilton Garden Inn Washington DC/U.S. Capitol

3 out of 5
Price was $451, price is now $353 per person
$353
per person
Oct 31 - Nov 3
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to Washington (DCA)
Kellogg Conference Hotel at Gallaudet University

Kellogg Conference Hotel at Gallaudet University

3 out of 5
Price was $526, price is now $424 per person
$424
per person
Oct 31 - Nov 3
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to Washington (DCA)
Placemakr Buzzard Point

Placemakr Buzzard Point

4 out of 5
Price was $459, price is now $381 per person
$381
per person
Oct 31 - Nov 3
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to Washington (DCA)
Country Inn & Suites by Radisson, Washington, D.C. East - Capitol Heights, MD

Country Inn & Suites by Radisson, Washington, D.C. East - Capitol Heights, MD

2.5 out of 5
Price was $426, price is now $366 per person
$366
per person
Oct 31 - Nov 3
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to Washington (DCA)
YOTEL Washington DC

YOTEL Washington DC

4 out of 5
Price was $424, price is now $367 per person
$367
per person
Oct 31 - Nov 3
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to Washington (DCA)
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Frequently asked questions

Can I catch a flight from SEA to Dulles Intl. Airport right now?
It's always wise to know about any travel advice reports and quarantine requirements in effect in your destination. Be sure to check out our Covid-19 Travel Advisor for up-to-date info on flying to Washington Dulles Intl. Airport (IAD).
Are there direct flights from Sea-Tac Airport to Washington Dulles Intl. Airport (IAD)?
Sometimes, it's the journey that counts; other times, it's all about the destination. If you're eager to get to where you're going fast, multiple airlines advertise direct flights from Sea-Tac Airport to Washington Dulles Intl. Airport (IAD), including Alaska Airlines and United Airlines.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Washington Dulles Intl. Airport (IAD), please visit our Customer Service Portal.
How long is the flight from Sea-Tac Airport to IAD?
The flight between Sea-Tac Airport and Washington Dulles Intl. Airport (IAD) is ordinarily around 5 hours and 3 minutes. Make your journey comfortable by saving a few podcasts on your phone or laptop and enjoying them with your seat reclined.
What is the flight distance from Sea-Tac Airport to IAD?
Between Sea-Tac Airport and Dulles Intl. Airport, the flight distance is around 2,300 mi. So, fasten your seat belt and make yourself comfortable. You've got some important choices to make — watch some television, finish your novel or catch up on your beauty sleep?
What airlines fly from SEA to IAD?
If you're heading to Sterling from Seattle, there are several airlines with direct flights. One of the top carriers is Alaska Airlines (AS), which operates 52 flights each month. You should also check out the deals available through United Airlines (UA). This carrier operates 30 flights monthly on the Seattle to Sterling route. Be sure to compare the two airlines to score the best fare.
What airlines have practices regarding COVID-19 in place and use social distancing?
From the moment you enter the departure terminal to when you leave the arrivals terminal, if you're flying with United Airlines, Delta or American Airlines you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Flight information from Seattle to Washington

 

Traveling From
Seattle - Tacoma Intl.
Traveling To
Washington Dulles Intl.
Shortest Flight Time
 hours mins
Earliest Departure Time
Latest Departure Time
Lowest Flight Price
$190

Route Info

Flight path for flights from Seattle-Tacoma International Airport to Washington Dulles International Airport


Origin:
SEA - Seattle-Tacoma International Airport
Destination:
IAD - Washington Dulles International Airport
Distance:
2,313.00 miles


Airlines & Aircraft Used on SEA to IAD Flight Routes


Airline Carrier
Aircraft
Delta Air Lines
Canadair Regional Jet 700

Discover our best flights from Seattle SEA to Washington IAD. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

 

Find our best return flights from Seattle SEA to Washington IAD at the right price  

Airfares to Washington IAD from Seattle SEA currently cost between $190 and $227. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way flights from Seattle SEA to Washington IAD 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Seattle SEA to Washington IAD on Travelocity starting at $124. Prices and availability subject to change. Additional terms may apply. 

 

Get to Washington IAD from Seattle SEA quicker with direct flights. 

Get to Washington faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to IAD from SEA to take around hour(s) min(s).  

 

Find our cheapest airfares for flights from Seattle SEA to Washington IAD

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to IAD from SEA. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

 

Get our best airfare deals for your flight from Seattle SEA to Washington IAD today 

If you’re flexible about when you travel, January is usually the cheapest month to fly from Seattle SEA to Washington IAD. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

 

Book flexible airline tickets for flights to Washington IAD from Seattle SEA 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to IAD from SEA have this option.  

 

Travel with confidence when you book flights to Washington IAD from Seattle SEA with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving. 

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*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.