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: Tue Sep 27 2016 Return: Tue Oct 4 2016 Trip spans 8 days
Depart: Tue Oct 11 2016 Return: Wed Oct 12 2016 Trip spans 2 days
Depart: Sat Sep 10 2016 Return: Tue Sep 13 2016 Trip spans 4 days
Depart: Tue Aug 9 2016 Return: Wed Aug 17 2016 Trip spans 9 days
Depart: Mon Oct 31 2016 Return: Tue Nov 1 2016 Trip spans 2 days
Depart: Sat Oct 29 2016 Return: Tue Nov 1 2016 Trip spans 4 days
Depart: Thu Nov 17 2016 Return: Mon Nov 21 2016 Trip spans 5 days
Depart: Sun Oct 2 2016 Return: Thu Oct 6 2016 Trip spans 5 days
Depart: Sat Oct 8 2016 Return: Sat Oct 29 2016 Trip spans 22 days
Depart: Tue Oct 18 2016 Return: Tue Oct 25 2016 Trip spans 8 days
Depart: Wed Aug 17 2016 Return: Tue Aug 30 2016 Trip spans 14 days
Depart: Sat Oct 15 2016 Return: Tue Oct 18 2016 Trip spans 4 days
Depart: Wed Sep 14 2016 Return: Tue Sep 20 2016 Trip spans 7 days
Depart: Tue Aug 30 2016 Return: Tue Sep 20 2016 Trip spans 22 days
Depart: Tue Oct 25 2016 Return: Sat Oct 29 2016 Trip spans 5 days
Depart: Wed Sep 28 2016 Return: Tue Oct 4 2016 Trip spans 7 days
Depart: Wed Sep 21 2016 Return: Tue Oct 11 2016 Trip spans 21 days
Depart: Fri Nov 4 2016 Return: Sun Nov 6 2016 Trip spans 3 days
Depart: Wed Aug 24 2016 Return: Sat Aug 27 2016 Trip spans 4 days
Depart: Wed Oct 5 2016 Return: Wed Oct 12 2016 Trip spans 8 days
Direct flights SEA to IAD on United
Flight # Depart SEA Arrive IAD Sun Mon Tue Wed Thu Fri Sat Valid Between
419 8:05 am 4:08 pm Sep 3 - Sep 6
419 8:05 am 4:08 pm Aug 20 - Aug 27
419 8:05 am 4:08 pm Aug 19 - Sep 2
419 8:05 am 4:08 pm Aug 16 - Aug 16
419 8:05 am 4:08 pm Aug 17 - Sep 1
419 8:10 am 4:12 pm Jul 29 - Aug 12
419 8:10 am 4:10 pm Aug 15 - Aug 15
419 8:10 am 4:12 pm Jul 31 - Aug 14
419 8:10 am 4:12 pm Jul 26 - Aug 13
260 12:55 pm 8:57 pm Aug 7 - Aug 14
260 12:55 pm 8:57 pm Aug 3 - Aug 3
260 12:55 pm 8:57 pm Jul 26 - Aug 4
260 12:55 pm 8:57 pm Aug 16 - Aug 24
260 12:55 pm 8:57 pm Aug 5 - Aug 12
260 12:55 pm 8:57 pm Aug 18 - Aug 22
260 12:55 pm 8:57 pm Aug 20 - Aug 27
260 12:55 pm 8:57 pm Aug 29 - Sep 1
260 12:55 pm 8:57 pm Aug 25 - Aug 26
260 12:55 pm 8:55 pm Aug 28 - Aug 28
260 12:55 pm 8:57 pm Sep 2 - Sep 6
260 12:55 pm 8:57 pm Sep 3 - Sep 3
260 12:55 pm 8:57 pm Aug 15 - Aug 15
260 12:55 pm 8:55 pm Aug 10 - Aug 10
260 12:55 pm 8:57 pm Aug 6 - Aug 13
1868 10:30 pm 6:24 am Aug 16 - Sep 9
1868 10:35 pm 6:28 am Jul 30 - Aug 13
1868 10:40 pm 6:33 am Jul 26 - Aug 15
1868 11:05 pm 6:59 am Aug 20 - Sep 3
* 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.

^ 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

39 travelers who booked a flight from Seattle to Washington rated their chosen airlines with an average of 6.9.

Overall
7.2
Boarding
7.3
Crew
7.8
Comfort
6.6
Food
6.2
Entertainment
6.2