$178 Cheap Flights from Seattle to Washington

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

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

Amazing SEA to IAD Flight Deals

The cheapest flights to Washington Dulles Intl. found within the past 7 days were $356 round trip and $178 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for SEA to IAD

CarrierFlightDepart SEAArrive IADThu
7/7
Fri
7/8
Sat
7/9
Sun
7/10
Mon
7/11
Tue
7/12
Wed
7/13
Stops
DL168108:30 am04:29 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
AS107810:05 am06:10 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA227501:25 pm09:20 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
AS109504:00 pm11:59 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA249211:15 pm07:14 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops

Frequently asked questions

 

Traveling From Seattle - Tacoma Intl.
Traveling To Washington Dulles Intl.
Shortest Flight Time 10 hours 55 mins
Earliest Departure Time 8:30AM EDT
Latest Departure Time 11:15PM EDT
Lowest Flight Price $356

Route Info

Flight path for flights from Seattle-Tacoma International Airport to 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 15 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 $356 and $373. 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 $178. 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) 55 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, October 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.