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

(Round-trip)
Depart: Tue Feb 23 2016 Return: Wed Feb 24 2016 Trip spans 2 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Wed Feb 24 2016 Return: Mon Feb 29 2016 Trip spans 6 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Thu Feb 25 2016 Return: Sat Feb 27 2016 Trip spans 3 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Sat Feb 27 2016 Return: Thu Mar 3 2016 Trip spans 6 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Mon Feb 29 2016 Return: Thu Mar 3 2016 Trip spans 4 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Tue Mar 1 2016 Return: Thu Mar 3 2016 Trip spans 3 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Wed Mar 2 2016 Return: Sat Mar 5 2016 Trip spans 4 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Sat Mar 5 2016 Return: Mon Mar 7 2016 Trip spans 3 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Fri Mar 4 2016 Return: Sat Mar 5 2016 Trip spans 2 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Tue Mar 8 2016 Return: Wed Mar 9 2016 Trip spans 2 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
SEA
7:55p
6h 05m
nonstop
SEA
4:50a
IAD
9:50a
5h 00m
nonstop
Depart: Wed Mar 9 2016 Return: Tue Mar 15 2016 Trip spans 6 days
Virgin America
Virgin America
IAD
4:00a
SEA
3:25p
11h 25m
1 stop
SEA
3:00a
IAD
10:45a
7h 45m
1 stop
Depart: Tue Mar 22 2016 Return: Wed Apr 6 2016 Trip spans 16 days
Virgin America
Virgin America
IAD
6:15a
SEA
3:05p
8h 50m
1 stop
SEA
3:00a
IAD
10:45a
7h 45m
1 stop
Depart: Tue Mar 29 2016 Return: Tue Apr 5 2016 Trip spans 8 days
Virgin America
Virgin America
IAD
5:00a
SEA
3:50p
10h 50m
1 stop
SEA
12:50p
IAD
10:55p
10h 05m
1 stop
Depart: Tue Apr 5 2016 Return: Wed Apr 6 2016 Trip spans 2 days
Virgin America
Virgin America
IAD
5:00a
SEA
3:50p
10h 50m
1 stop
SEA
3:00a
IAD
10:45a
7h 45m
1 stop
Depart: Wed Apr 6 2016 Return: Tue Apr 12 2016 Trip spans 7 days
Virgin America
Virgin America
IAD
5:00a
SEA
3:50p
10h 50m
1 stop
SEA
12:50p
IAD
10:55p
10h 05m
1 stop
Depart: Tue Apr 12 2016 Return: Sat Apr 23 2016 Trip spans 12 days
Virgin America
Virgin America
IAD
3:10a
SEA
3:05p
11h 55m
1 stop
SEA
5:00a
IAD
4:00p
11h 00m
1 stop
Depart: Thu Mar 10 2016 Return: Mon Mar 14 2016 Trip spans 4 days
United
United
IAD
12:43p
SEA
6:40p
5h 57m
nonstop
SEA
3:53a
IAD
8:53a
5h 00m
nonstop
Depart: Fri Mar 18 2016 Return: Fri Mar 25 2016 Trip spans 8 days
Delta
Delta
IAD
2:00a
SEA
10:53p
20h 53m
1 stop
SEA
5:39a
IAD
3:06p
9h 27m
1 stop
Depart: Mon Jul 18 2016 Return: Mon Jul 25 2016 Trip spans 8 days
American Airlines
American Airlines
IAD
2:35p
SEA
11:15p
8h 40m
1 stop
SEA
8:15p
IAD
4:21a
8h 06m
1 stop
Depart: Thu Jul 14 2016 Return: Mon Jul 18 2016 Trip spans 5 days
JetBlue
JetBlue
IAD
10:50a
SEA
10:59p
12h 09m
1 stop
SEA
7:26p
IAD
3:21a
7h 55m
1 stop
Direct flights IAD to SEA on United
Flight # Depart IAD Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
389 8:45 am 11:45 am Mar 2 - Mar 2
389 8:45 am 11:43 am Feb 24 - Feb 24
389 8:45 am 11:45 am Feb 22 - Mar 1
389 8:45 am 11:45 am Feb 12 - Feb 19
389 8:53 am 11:42 am Mar 3 - Mar 3
389 8:53 am 11:42 am Mar 14 - Mar 17
389 8:53 am 11:40 am Mar 16 - Mar 30
389 8:53 am 11:42 am Mar 7 - Mar 10
389 8:53 am 11:40 am Mar 8 - Mar 8
389 8:53 am 11:42 am Mar 9 - Mar 9
389 8:53 am 11:40 am Mar 15 - Mar 15
771 3:15 pm 6:00 pm Mar 8 - Mar 8
771 3:15 pm 6:00 pm Mar 15 - Mar 22
771 3:22 pm 6:07 pm Mar 18 - Apr 1
771 3:22 pm 6:07 pm Mar 3 - Mar 10
771 3:22 pm 6:07 pm Mar 4 - Mar 11
771 3:22 pm 6:07 pm Mar 14 - Mar 31
326 5:40 pm 8:37 pm Mar 19 - Mar 19
326 5:40 pm 8:37 pm Mar 12 - Mar 12
326 5:40 pm 8:37 pm Mar 5 - Mar 5
326 5:43 pm 8:40 pm Mar 3 - Mar 10
326 5:43 pm 8:40 pm Mar 11 - Mar 11
326 5:43 pm 8:40 pm Mar 14 - Mar 24
326 5:43 pm 8:40 pm Mar 8 - Mar 8
326 5:43 pm 8:40 pm Mar 15 - Mar 15
326 5:43 pm 8:40 pm Mar 18 - Mar 18
326 5:43 pm 8:40 pm Mar 4 - Mar 4
326 5:45 pm 8:42 pm Mar 16 - Mar 23
326 5:45 pm 8:42 pm Mar 13 - Mar 20
326 5:45 pm 8:42 pm Mar 9 - Mar 9
326 5:45 pm 8:42 pm Mar 6 - Mar 6
326 5:47 pm 8:45 pm Feb 12 - Feb 19
326 5:47 pm 8:45 pm Feb 22 - Feb 22
326 5:47 pm 8:45 pm Feb 11 - Feb 25
326 5:47 pm 8:45 pm Feb 21 - Mar 2
326 5:47 pm 8:45 pm Feb 29 - Feb 29
326 5:47 pm 8:45 pm Feb 20 - Feb 20
326 5:47 pm 8:45 pm Feb 16 - Mar 1
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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

Here's why:

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

We aggregate tons 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 don'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.

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Airports
Origin

Washington
$257
Destination

Seattle
$257