Find Deals on Flights from Washington Dulles Intl to Seattle/Tacoma Intl (IAD - SEA)

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/Tacoma Intl

(Round-trip)
Depart: Mon Sep 19 2016 Return: Tue Sep 27 2016 Trip spans 9 days
Depart: Sat Sep 10 2016 Return: Tue Sep 20 2016 Trip spans 11 days
Depart: Tue Aug 23 2016 Return: Tue Aug 30 2016 Trip spans 8 days
Depart: Thu Aug 11 2016 Return: Wed Aug 24 2016 Trip spans 14 days
Depart: Tue Oct 18 2016 Return: Wed Oct 26 2016 Trip spans 9 days
Depart: Wed Jul 27 2016 Return: Wed Aug 3 2016 Trip spans 8 days
Depart: Sun Nov 20 2016 Return: Wed Nov 30 2016 Trip spans 11 days
Depart: Tue Oct 4 2016 Return: Mon Oct 10 2016 Trip spans 7 days
Depart: Sat Oct 8 2016 Return: Sat Oct 15 2016 Trip spans 8 days
Depart: Wed Aug 24 2016 Return: Tue Aug 30 2016 Trip spans 7 days
Depart: Tue Sep 27 2016 Return: Wed Sep 28 2016 Trip spans 2 days
Depart: Tue Oct 11 2016 Return: Tue Oct 18 2016 Trip spans 8 days
Depart: Tue Aug 30 2016 Return: Wed Sep 7 2016 Trip spans 9 days
Depart: Wed Nov 30 2016 Return: Tue Dec 13 2016 Trip spans 14 days
Depart: Sat Oct 15 2016 Return: Wed Oct 19 2016 Trip spans 5 days
Depart: Wed Aug 31 2016 Return: Wed Sep 7 2016 Trip spans 8 days
Depart: Mon Jan 9 2017 Return: Sat Jan 14 2017 Trip spans 6 days
Depart: Sat Aug 13 2016 Return: Thu Aug 18 2016 Trip spans 6 days
Depart: Wed Oct 19 2016 Return: Sat Oct 22 2016 Trip spans 4 days
Depart: Tue Sep 6 2016 Return: Tue Sep 13 2016 Trip spans 8 days
Direct flights IAD to SEA on United
Flight # Depart IAD Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
389 8:55 am 11:37 am Aug 29 - Sep 1
389 8:55 am 11:35 am Aug 28 - Aug 28
389 8:55 am 11:37 am Aug 25 - Aug 26
389 8:55 am 11:37 am Aug 20 - Aug 27
389 8:55 am 11:37 am Aug 18 - Aug 22
389 8:55 am 11:37 am Aug 17 - Aug 24
389 8:55 am 11:37 am Aug 16 - Aug 16
389 9:05 am 11:50 am Jul 23 - Aug 13
389 9:05 am 11:50 am Jul 24 - Aug 14
389 9:05 am 11:50 am Aug 1 - Aug 1
389 9:05 am 11:50 am Aug 2 - Aug 15
389 9:05 am 11:50 am Aug 3 - Aug 3
389 9:05 am 11:48 am Aug 10 - Aug 10
1603 3:17 pm 6:02 pm Jul 31 - Jul 31
1603 3:30 pm 6:15 pm Aug 7 - Aug 14
1603 3:30 pm 6:15 pm Jul 22 - Aug 12
1603 3:40 pm 6:25 pm Aug 2 - Aug 10
1603 3:40 pm 6:25 pm Jul 30 - Jul 30
1603 3:47 pm 6:28 pm Aug 15 - Aug 15
1603 3:47 pm 6:32 pm Aug 6 - Aug 13
1603 3:47 pm 6:28 pm Aug 1 - Aug 11
1603 3:55 pm 6:27 pm Aug 16 - Aug 24
1603 3:55 pm 6:27 pm Aug 25 - Sep 5
1603 3:55 pm 6:27 pm Aug 20 - Sep 3
1603 3:55 pm 6:27 pm Aug 18 - Aug 18
326 6:35 pm 9:24 pm Aug 20 - Aug 27
326 6:35 pm 9:24 pm Aug 17 - Sep 2
326 6:35 pm 9:24 pm Aug 16 - Aug 21
326 6:35 pm 9:24 pm Aug 28 - Sep 4
326 6:40 pm 9:32 pm Jul 31 - Jul 31
326 6:40 pm 9:32 pm Aug 1 - Aug 1
326 6:40 pm 9:32 pm Aug 2 - Aug 2
326 6:40 pm 9:32 pm Aug 3 - Aug 11
326 6:40 pm 9:32 pm Aug 15 - Aug 15
326 6:40 pm 9:32 pm Aug 13 - Aug 13
326 6:40 pm 9:32 pm Jul 22 - Aug 12
326 6:40 pm 9:32 pm Jul 30 - Aug 6
326 6:40 pm 9:32 pm Aug 7 - Aug 14
* 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
$244
Destination

Seattle
$244
Airlines Airline reviews

36 travelers who booked a flight from Washington to Seattle rated their chosen airlines with an average of 7.3.

Overall
7.8
Boarding
7.9
Crew
8.2
Comfort
7.4
Food
6.7
Entertainment
6.4