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

(Round-trip)
Depart: Tue Sep 27 2016 Return: Fri Sep 30 2016 Trip spans 4 days
Depart: Sat Oct 15 2016 Return: Sat Oct 22 2016 Trip spans 8 days
Depart: Fri Nov 4 2016 Return: Sat Nov 5 2016 Trip spans 2 days
Depart: Mon Jan 9 2017 Return: Tue Jan 17 2017 Trip spans 9 days
Depart: Sat Oct 29 2016 Return: Fri Nov 4 2016 Trip spans 7 days
Depart: Sun Nov 6 2016 Return: Mon Nov 7 2016 Trip spans 2 days
Depart: Wed Nov 23 2016 Return: Thu Nov 24 2016 Trip spans 2 days
Depart: Wed Sep 28 2016 Return: Sat Oct 1 2016 Trip spans 4 days
Depart: Fri Feb 24 2017 Return: Mon Feb 27 2017 Trip spans 4 days
Depart: Wed Oct 19 2016 Return: Sat Oct 22 2016 Trip spans 4 days
Depart: Tue Oct 4 2016 Return: Wed Oct 12 2016 Trip spans 9 days
Depart: Mon Nov 7 2016 Return: Wed Nov 16 2016 Trip spans 10 days
Depart: Wed Oct 5 2016 Return: Wed Oct 12 2016 Trip spans 8 days
Depart: Tue Oct 11 2016 Return: Tue Oct 18 2016 Trip spans 8 days
Depart: Fri Oct 7 2016 Return: Mon Oct 17 2016 Trip spans 11 days
Depart: Wed Oct 12 2016 Return: Tue Oct 18 2016 Trip spans 7 days
Depart: Thu Oct 13 2016 Return: Mon Oct 17 2016 Trip spans 5 days
Depart: Tue Jan 10 2017 Return: Tue Jan 17 2017 Trip spans 8 days
Depart: Wed Oct 26 2016 Return: Tue Nov 1 2016 Trip spans 7 days
Depart: Sat Dec 3 2016 Return: Tue Dec 6 2016 Trip spans 4 days
Direct flights SEA to IAD on United
Flight # Depart SEA Arrive IAD Sun Mon Tue Wed Thu Fri Sat Valid Between
419 7:58 am 4:00 pm Sep 15 - Sep 20
419 7:58 am 4:00 pm Sep 21 - Sep 26
419 7:58 am 4:00 pm Sep 23 - Oct 1
419 7:58 am 4:00 pm Sep 8 - Sep 14
419 7:58 am 4:00 pm Sep 7 - Sep 13
419 7:58 am 4:00 pm Oct 2 - Oct 2
419 8:05 am 4:08 pm Aug 26 - Sep 2
419 8:05 am 4:08 pm Sep 3 - Sep 6
419 8:05 am 4:08 pm Sep 5 - Sep 5
419 8:05 am 4:08 pm Aug 23 - Sep 1
260 12:55 pm 8:59 pm Sep 10 - Oct 1
260 12:55 pm 8:59 pm Sep 9 - Sep 9
260 12:55 pm 8:59 pm Sep 7 - Sep 22
260 12:55 pm 8:59 pm Sep 27 - Oct 4
260 12:55 pm 8:55 pm Sep 4 - Sep 4
260 12:55 pm 8:57 pm Sep 3 - Sep 3
260 12:55 pm 8:59 pm Sep 26 - Oct 2
260 12:55 pm 8:59 pm Sep 28 - Sep 28
260 12:55 pm 8:59 pm Sep 25 - Sep 25
260 12:55 pm 8:57 pm Sep 5 - Sep 6
260 12:55 pm 8:57 pm Aug 29 - Sep 1
260 12:55 pm 8:55 pm Sep 2 - Sep 2
260 12:55 pm 8:59 pm Sep 16 - Sep 30
1868 10:30 pm 6:24 am Sep 12 - Oct 5
1868 10:30 pm 6:24 am Aug 23 - Sep 9
1868 11:05 pm 6:59 am Aug 27 - Sep 3
1868 11:20 pm 7:14 am Sep 18 - Sep 25
1868 11:20 pm 7:14 am Oct 2 - Oct 2
1868 11:20 pm 7:14 am Sep 11 - Sep 11
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.

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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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Airports
Origin

Seattle
$202
Destination

Washington
$202
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