Find Cheap Flights from Washington Dulles Intl to Seattle

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Washington Dulles Intl to Seattle

(Round-trip)
Depart: Wed Jun 7 2017 Return: Wed Jun 14 2017 Trip spans 8 days
Major Airline
Major Airline
IAD
10:39a
SEA
4:52a
18h 13m
nonstop
SEA
1:58a
IAD
6:02p
16h 04m
nonstop
Depart: Mon May 8 2017 Return: Sat May 13 2017 Trip spans 6 days
Frontier
Frontier
IAD
2:55p
SEA
9:15a
18h 20m
1 stop
SEA
2:24p
IAD
10:05p
7h 41m
1 stop
Depart: Sat Apr 29 2017 Return: Mon May 1 2017 Trip spans 3 days
American Airlines
American Airlines
IAD
12:06p
SEA
7:57p
7h 51m
1 stop
SEA
6:20p
IAD
3:17a
8h 57m
1 stop
Depart: Sat Aug 26 2017 Return: Sat Sep 2 2017 Trip spans 8 days
Delta
Delta
IAD
12:50p
SEA
8:35p
7h 45m
1 stop
SEA
8:55p
IAD
5:26a
8h 31m
1 stop
Depart: Sun Sep 3 2017 Return: Thu Sep 7 2017 Trip spans 5 days
JetBlue
JetBlue
IAD
2:25a
SEA
11:32a
9h 07m
1 stop
SEA
3:00a
IAD
11:14a
8h 14m
1 stop
Depart: Tue Jun 6 2017 Return: Fri Jun 9 2017 Trip spans 4 days
United
United
IAD
12:05p
SEA
5:46p
5h 41m
nonstop
SEA
6:30p
IAD
11:22p
4h 52m
nonstop
Depart: Mon Aug 21 2017 Return: Fri Sep 1 2017 Trip spans 12 days
Alaska Airlines
Alaska Airlines
IAD
1:20p
SEA
7:20p
6h 00m
nonstop
SEA
4:20a
IAD
9:20a
5h 00m
nonstop
Depart: Tue May 9 2017 Return: Sat May 13 2017 Trip spans 5 days
Frontier
Frontier
IAD
2:55p
SEA
9:15a
18h 20m
1 stop
SEA
2:24p
IAD
10:05p
7h 41m
1 stop
Depart: Wed May 31 2017 Return: Tue Jun 6 2017 Trip spans 7 days
Major Airline
Major Airline
IAD
9:30a
SEA
3:28p
5h 58m
nonstop
SEA
12:10a
IAD
5:17a
5h 07m
nonstop
Depart: Sat Sep 9 2017 Return: Sun Sep 24 2017 Trip spans 16 days
Major Airline
Major Airline
IAD
9:30a
SEA
3:25p
5h 55m
nonstop
SEA
12:20a
IAD
5:20a
5h 00m
nonstop
Depart: Wed May 10 2017 Return: Sat May 13 2017 Trip spans 4 days
Frontier
Frontier
IAD
2:55p
SEA
9:15a
18h 20m
1 stop
SEA
2:24p
IAD
10:05p
7h 41m
1 stop
Depart: Mon May 1 2017 Return: Thu May 4 2017 Trip spans 4 days
American Airlines
American Airlines
IAD
1:05a
SEA
9:03a
7h 58m
1 stop
SEA
6:20p
IAD
1:48a
7h 28m
1 stop
Depart: Thu Jun 8 2017 Return: Fri Jun 9 2017 Trip spans 2 days
Major Airline
Major Airline
IAD
9:20a
SEA
3:28p
6h 08m
nonstop
SEA
12:10a
IAD
5:17a
5h 07m
nonstop
Depart: Fri Sep 8 2017 Return: Mon Sep 11 2017 Trip spans 4 days
Delta
Delta
IAD
12:50p
SEA
8:35p
7h 45m
1 stop
SEA
7:20p
IAD
1:56a
6h 36m
1 stop
Depart: Sat May 6 2017 Return: Sat May 27 2017 Trip spans 22 days
Frontier
Frontier
IAD
2:55p
SEA
9:15a
18h 20m
1 stop
SEA
2:24p
IAD
10:05p
7h 41m
1 stop
Depart: Wed May 3 2017 Return: Thu May 4 2017 Trip spans 2 days
American Airlines
American Airlines
IAD
1:05a
SEA
9:03a
7h 58m
1 stop
SEA
6:20p
IAD
1:48a
7h 28m
1 stop
Depart: Wed Oct 4 2017 Return: Sat Oct 7 2017 Trip spans 4 days
Delta
Delta
IAD
3:55a
SEA
12:34p
8h 39m
1 stop
SEA
5:30a
IAD
2:24p
8h 54m
1 stop
Depart: Thu Jun 1 2017 Return: Sat Jun 10 2017 Trip spans 10 days
Major Airline
Major Airline
IAD
9:30a
SEA
3:28p
5h 58m
nonstop
SEA
12:10a
IAD
5:17a
5h 07m
nonstop
Depart: Tue May 16 2017 Return: Sat May 20 2017 Trip spans 5 days
Frontier
Frontier
IAD
2:55p
SEA
9:15a
18h 20m
1 stop
SEA
2:24p
IAD
10:05p
7h 41m
1 stop
Depart: Sun May 7 2017 Return: Tue May 9 2017 Trip spans 3 days
American Airlines
American Airlines
IAD
1:05a
SEA
9:03a
7h 58m
1 stop
SEA
8:14p
IAD
3:17a
7h 03m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Washington
$254
Destination

Seattle
$254
Airlines Airline reviews

90 travelers who booked a flight from Washington to Seattle rated their chosen airlines with an average of 7.2.

Overall
7.5
Boarding
7.8
Crew
7.9
Comfort
7.2
Food
6.5
Entertainment
6.3