$107 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 $184 round trip and $107 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Sep 4 - Sat, Sep 6
SEA
Seattle
IAD
Washington
$184 Roundtrip, found 3 days ago
$184
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Thu, Sep 4 from Seattle to Washington, returning Sat, Sep 6, priced at $184 found 3 days ago
Thu, Sep 4 - Sat, Sep 6
SEA
Seattle
IAD
Washington
$224 Roundtrip, found 3 days ago
$224
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Thu, Sep 4 from Seattle to Washington, returning Sat, Sep 6, priced at $224 found 3 days ago
Tue, Jul 29 - Tue, Sep 2
SEA
Seattle
IAD
Washington
$236 Roundtrip, found 6 days ago
$236
Roundtrip
found 6 days ago
Select United flight, departing Tue, Jul 29 from Seattle to Washington, returning Tue, Sep 2, priced at $236 found 6 days ago
Thu, Sep 4 - Sat, Sep 6
SEA
Seattle
IAD
Washington
$245 Roundtrip, found 3 days ago
$245
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Thu, Sep 4 from Seattle to Washington, returning Sat, Sep 6, priced at $245 found 3 days ago
Sat, Aug 30 - Thu, Sep 11
SEA
Seattle
IAD
Washington
$250 Roundtrip, found 6 days ago
$250
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Sat, Aug 30 from Seattle to Washington, returning Thu, Sep 11, priced at $250 found 6 days ago
Sat, Oct 18 - Sat, Nov 8
SEA
Seattle
IAD
Washington
$260 Roundtrip, found 5 days ago
$260
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Oct 18 from Seattle to Washington, returning Sat, Nov 8, priced at $260 found 5 days ago
Tue, Jul 29 - Tue, Sep 2
SEA
Seattle
IAD
Washington
$264 Roundtrip, found 6 days ago
$264
Roundtrip
found 6 days ago
Select United flight, departing Tue, Jul 29 from Seattle to Washington, returning Tue, Sep 2, priced at $264 found 6 days ago
Wed, Oct 1 - Wed, Oct 8
SEA
Seattle
IAD
Washington
$277 Roundtrip, found 6 hours ago
$277
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Wed, Oct 1 from Seattle to Washington, returning Wed, Oct 8, priced at $277 found 6 hours ago
Sat, Oct 25 - Sat, Nov 1
SEA
Seattle
IAD
Washington
$277 Roundtrip, found 1 day ago
$277
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 25 from Seattle to Washington, returning Sat, Nov 1, priced at $277 found 1 day ago
Sat, Oct 25 - Sat, Nov 1
SEA
Seattle
IAD
Washington
$277 Roundtrip, found 1 day ago
$277
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Oct 25 from Seattle to Washington, returning Sat, Nov 1, priced at $277 found 1 day ago

Washington Dulles Intl. flight + hotel packages - economy flights

Price found within the past 48 hours. Click for updated prices.
Le Meridien Washington, D.C., The Madison

Le Meridien Washington, D.C., The Madison

4.5 out of 5
per person
Aug 19 - Aug 22
found 14 hours ago
Roundtrip non-stop flight included
Seattle (SEA) to Washington (DCA)
Kimpton Banneker Hotel by IHG

Kimpton Banneker Hotel by IHG

4.5 out of 5
per person
Aug 19 - Aug 22
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to Washington (DCA)
Moxy Washington DC Downtown

Moxy Washington DC Downtown

3 out of 5
per person
Aug 19 - Aug 22
found 14 hours ago
Roundtrip non-stop flight included
Seattle (SEA) to Washington (DCA)
AC Hotel by Marriott Washington DC Convention Center

AC Hotel by Marriott Washington DC Convention Center

4 out of 5
per person
Aug 19 - Aug 22
found 14 hours ago
Roundtrip non-stop flight included
Seattle (SEA) to Washington (DCA)
The Jefferson, Washington, DC

The Jefferson, Washington, DC

5 out of 5
per person
Aug 19 - Aug 22
found 14 hours 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
10 hours 57 mins
Earliest Departure Time
12:20AM EDT
Latest Departure Time
11:30PM EDT
Lowest Flight Price
$184

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 $184 and $277. 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 $107. 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 10 hour(s) 57 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, September 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. 

*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.