$107 Cheap flights from Washington Dulles Intl. to Seattle - Tacoma Intl. (IAD to SEA)

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

Compare Flight Prices from Washington to Seattle

Affordable Airfare Tickets from IAD to SEA Airport

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were $208 round trip and $107 one way. Prices and availability subject to change. Additional terms may apply.

Fri, May 2 - Fri, May 9
IAD
Washington
SEA
Seattle
$208 Roundtrip, found 1 day ago
$208
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, May 2 from Washington to Seattle, returning Fri, May 9, priced at $208 found 1 day ago
Thu, May 29 - Thu, Jun 5
IAD
Washington
SEA
Seattle
$212 Roundtrip, found 4 hours ago
$212
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, May 29 from Washington to Seattle, returning Thu, Jun 5, priced at $212 found 4 hours ago
Fri, May 9 - Fri, May 16
IAD
Washington
SEA
Seattle
$230 Roundtrip, found 1 hour ago
$230
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, May 9 from Washington to Seattle, returning Fri, May 16, priced at $230 found 1 hour ago
Thu, May 22 - Sun, May 25
IAD
Washington
SEA
Seattle
$232 Roundtrip, just found
$232
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, May 22 from Washington to Seattle, returning Sun, May 25, priced at $232 just found
Thu, Jun 5 - Tue, Jun 10
IAD
Washington
SEA
Seattle
$237 Roundtrip, just found
$237
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Jun 5 from Washington to Seattle, returning Tue, Jun 10, priced at $237 just found
Thu, May 8 - Sat, May 24
IAD
Washington
SEA
Seattle
$241 Roundtrip, found 3 hours ago
$241
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Thu, May 8 from Washington to Seattle, returning Sat, May 24, priced at $241 found 3 hours ago
Wed, May 28 - Thu, Jun 5
IAD
Washington
SEA
Seattle
$242 Roundtrip, found 13 hours ago
$242
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Wed, May 28 from Washington to Seattle, returning Thu, Jun 5, priced at $242 found 13 hours ago
Fri, Jun 6 - Tue, Jun 10
IAD
Washington
SEA
Seattle
$242 Roundtrip, found 23 hours ago
$242
Roundtrip
found 23 hours ago
Select Frontier Airlines flight, departing Fri, Jun 6 from Washington to Seattle, returning Tue, Jun 10, priced at $242 found 23 hours ago
Thu, Jun 5 - Tue, Jun 10
IAD
Washington
SEA
Seattle
$247 Roundtrip, just found
$247
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Jun 5 from Washington to Seattle, returning Tue, Jun 10, priced at $247 just found
Mon, May 5 - Fri, May 16
IAD
Washington
SEA
Seattle
$251 Roundtrip, found 2 hours ago
$251
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Mon, May 5 from Washington to Seattle, returning Fri, May 16, priced at $251 found 2 hours ago

Seattle - Tacoma Intl. flight + hotel packages - economy flights

Price found within the past 48 hours. Click for updated prices.
SpringHill Suites by Marriott Seattle Downtown/ S Lake Union

SpringHill Suites by Marriott Seattle Downtown/ S Lake Union

3 out of 5
per person
Jun 2 - Jun 6
found 1 day ago
Roundtrip flight included
Washington (DCA) to Seattle (SEA)
Level Seattle Downtown - South Lake Union

Level Seattle Downtown - South Lake Union

3.5 out of 5
per person
Jun 2 - Jun 6
found 1 day ago
Roundtrip flight included
Washington (DCA) to Seattle (SEA)
Residence Inn Seattle Northgate Station

Residence Inn Seattle Northgate Station

3 out of 5
per person
Jun 2 - Jun 6
found 1 day ago
Roundtrip flight included
Washington (DCA) to Seattle (SEA)
Kings Inn

Kings Inn

2 out of 5
per person
Jun 2 - Jun 6
found 1 day ago
Roundtrip flight included
Washington (DCA) to Seattle (SEA)
AC Hotel by Marriott Seattle Downtown

AC Hotel by Marriott Seattle Downtown

2 out of 5
per person
Jun 2 - Jun 6
found 1 day ago
Roundtrip flight included
Washington (DCA) to Seattle (SEA)
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Frequently asked questions

Are there direct flights from Dulles Intl. Airport to SEA?
Sometimes, a vacation is all about the journey; sometimes the magic is in the destination. If you just want to get to Seattle fast, multiple airlines advertise direct flights from Washington Dulles Intl. Airport (IAD) to SEA, including Alaska Airlines and United Airlines.
How long is the flight from IAD to Sea-Tac Airport?
With the flight from Dulles Intl. Airport to Sea-Tac Airport taking around 5 hours and 58 minutes, you’ll have time to get lots of things done in the air. Make the most of your trip by bringing that novel you always wanted to read, exploring the in-flight entertainment or having a decent nap. You might even find you’re able to squeeze in all three before the plane lands.
What is the flight distance from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA)?
The flight distance from Washington Dulles Intl. Airport (IAD) to Sea-Tac Airport is 2,300 mi. Make sure to bring something to read or some Sudoku puzzles to make your journey fly by.
What airlines fly from IAD to Sea-Tac Airport?
You can take your pick from a number of airlines advertising direct flights between Sterling and Seattle. Alaska Airlines (AS) is one of the most well-known. This carrier operates roughly 52 flights each month. You should also look up the deals on offer from United Airlines (UA). Another leading airline, it operates 30 flights every month on the Sterling to Seattle route. Compare the two airlines to walk away with the best fare.
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 Washington to Seattle

 

Traveling From
Washington Dulles Intl.
Traveling To
Seattle - Tacoma Intl.
Shortest Flight Time
5 hours 40 mins
Earliest Departure Time
6:30AM EDT
Latest Departure Time
7:13PM EDT
Lowest Flight Price
$208

Route Info

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


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


Airlines & Aircraft Used on IAD to SEA Flight Routes


Airline Carrier
Aircraft
Alaska Airlines
Canadair Regional Jet 700
Alaska Airlines
Embraer RJ140
Alaska Airlines
Embraer RJ145 Amazon
United Airlines
Boeing 737-800 pax

Discover our best flights from Washington IAD to Seattle SEA. 

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 Washington IAD to Seattle SEA at the right price  

Airfares to Seattle SEA from Washington IAD currently cost between $208 and $251. 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 Washington IAD to Seattle SEA 

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 Washington IAD to Seattle SEA on Travelocity starting at $107. Prices and availability subject to change. Additional terms may apply. 

 

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

Get to Seattle faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to SEA from IAD to take around 5 hour(s) 40 min(s).  

 

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

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to SEA from IAD. 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 Washington IAD to Seattle SEA today 

If you’re flexible about when you travel, May is usually the cheapest month to fly from Washington IAD to Seattle SEA. 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 Seattle SEA from Washington IAD 

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

 

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