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

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

Book cheap flights from Seattle/Tacoma Intl to Washington Dulles Intl

(Round-trip)
Depart: Wed Sep 28 2016 Return: Tue Oct 11 2016 Trip spans 14 days
Depart: Tue Sep 20 2016 Return: Wed Sep 21 2016 Trip spans 2 days
Depart: Sun Dec 4 2016 Return: Mon Dec 5 2016 Trip spans 2 days
Depart: Tue Nov 1 2016 Return: Sat Nov 5 2016 Trip spans 5 days
Depart: Tue Jan 17 2017 Return: Wed Jan 25 2017 Trip spans 9 days
Depart: Sat Oct 15 2016 Return: Sat Oct 22 2016 Trip spans 8 days
Depart: Wed Nov 23 2016 Return: Fri Nov 25 2016 Trip spans 3 days
Depart: Fri Dec 2 2016 Return: Mon Dec 5 2016 Trip spans 4 days
Depart: Thu Dec 8 2016 Return: Tue Jan 31 2017 Trip spans 55 days
Depart: Tue Sep 13 2016 Return: Tue Sep 20 2016 Trip spans 8 days
Depart: Wed Sep 14 2016 Return: Tue Sep 20 2016 Trip spans 7 days
Depart: Tue Sep 27 2016 Return: Fri Sep 30 2016 Trip spans 4 days
Depart: Wed Sep 21 2016 Return: Sat Sep 24 2016 Trip spans 4 days
Depart: Sat Oct 1 2016 Return: Tue Oct 4 2016 Trip spans 4 days
Depart: Sat Sep 24 2016 Return: Tue Sep 27 2016 Trip spans 4 days
Depart: Tue Oct 4 2016 Return: Wed Oct 12 2016 Trip spans 9 days
Depart: Wed Nov 2 2016 Return: Mon Nov 7 2016 Trip spans 6 days
Depart: Sun Sep 11 2016 Return: Fri Sep 16 2016 Trip spans 6 days
Depart: Wed Oct 5 2016 Return: Sat Oct 8 2016 Trip spans 4 days
Depart: Tue Jan 10 2017 Return: Sat Jan 14 2017 Trip spans 5 days
Direct flights SEA to IAD on United
Flight # Depart SEA Arrive IAD Sun Mon Tue Wed Thu Fri Sat Valid Between
419 7:50 am 3:52 pm Oct 6 - Oct 23
419 7:58 am 4:00 pm Sep 8 - Sep 11
419 7:58 am 4:00 pm Sep 28 - Oct 3
419 7:58 am 4:00 pm Sep 15 - Sep 21
419 7:58 am 4:00 pm Sep 17 - Sep 17
419 7:58 am 4:00 pm Sep 18 - Sep 27
419 7:58 am 4:00 pm Sep 7 - Sep 14
419 7:58 am 4:00 pm Sep 29 - Oct 5
419 8:05 am 4:08 pm Sep 6 - Sep 6
419 8:05 am 4:08 pm Sep 5 - Sep 5
260 12:55 pm 8:59 pm Sep 7 - Sep 22
260 12:55 pm 8:57 pm Sep 5 - Sep 6
260 12:55 pm 8:59 pm Sep 24 - Oct 1
260 12:55 pm 8:59 pm Sep 16 - Sep 30
260 12:55 pm 8:59 pm Sep 26 - Oct 2
260 12:55 pm 8:59 pm Sep 10 - Sep 10
260 12:55 pm 8:59 pm Sep 17 - Sep 17
260 12:55 pm 8:59 pm Sep 25 - Sep 25
260 12:55 pm 8:59 pm Sep 27 - Oct 4
260 12:55 pm 9:02 pm Oct 6 - Oct 6
260 12:55 pm 8:59 pm Sep 28 - Sep 28
260 12:55 pm 8:59 pm Oct 5 - Oct 5
260 12:55 pm 8:59 pm Sep 9 - Sep 9
1868 10:30 pm 6:24 am Sep 12 - Oct 5
1868 10:30 pm 6:24 am Oct 6 - Oct 19
1868 10:30 pm 6:24 am Aug 28 - Sep 8
1868 10:33 pm 6:27 am Sep 9 - Sep 9
1868 11:20 pm 7:14 am Oct 2 - Oct 2
1868 11:20 pm 7:14 am Sep 25 - Sep 25
1868 11:20 pm 7:14 am Sep 11 - Sep 18
* 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,
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^ The fares displayed in KAYAK ads found on other sites include all taxes and fees for economy class travel and were found by KAYAK users in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
Airports
Origin

Seattle
$244
Destination

Washington
$244
Airlines Airline reviews

46 travelers who booked a flight from Seattle to Washington rated their chosen airlines with an average of 6.7.

Overall
7.1
Boarding
7.2
Crew
7.4
Comfort
6.4
Food
6.1
Entertainment
6.1