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 Apr 18 2017 Return: Tue Apr 25 2017 Trip spans 8 days
Major Airline
Major Airline
IAD
10:30a
SEA
4:05a
17h 35m
1 stop
SEA
2:26p
IAD
10:24p
7h 58m
1 stop
Depart: Thu Mar 16 2017 Return: Wed Mar 22 2017 Trip spans 7 days
United
United
IAD
12:30p
SEA
6:11p
5h 41m
nonstop
SEA
6:15p
IAD
11:10p
4h 55m
nonstop
Depart: Sat Apr 22 2017 Return: Sat Apr 29 2017 Trip spans 8 days
Frontier
Frontier
IAD
2:55p
SEA
9:15a
18h 20m
1 stop
SEA
5:57a
IAD
10:19p
16h 22m
1 stop
Depart: Wed Aug 2 2017 Return: Wed Aug 9 2017 Trip spans 8 days
Delta
Delta
IAD
3:30a
SEA
11:25a
7h 55m
1 stop
SEA
7:25a
IAD
4:08p
8h 43m
1 stop
Depart: Wed Mar 29 2017 Return: Tue Apr 4 2017 Trip spans 7 days
JetBlue
JetBlue
IAD
6:00a
SEA
10:58p
16h 58m
1 stop
SEA
6:26p
IAD
1:00p
18h 34m
1 stop
Depart: Sun Mar 19 2017 Return: Tue Mar 28 2017 Trip spans 10 days
Alaska Airlines
Alaska Airlines
IAD
1:30p
SEA
7:28p
5h 58m
nonstop
SEA
4:20a
IAD
9:15a
4h 55m
nonstop
Depart: Thu Apr 20 2017 Return: Tue May 2 2017 Trip spans 13 days
Major Airline
Major Airline
IAD
10:45p
SEA
6:58p
20h 13m
1 stop
SEA
2:26p
IAD
9:50p
7h 24m
1 stop
Depart: Tue May 2 2017 Return: Wed May 10 2017 Trip spans 9 days
Major Airline
Major Airline
IAD
2:00a
SEA
6:58p
16h 58m
1 stop
SEA
9:00a
IAD
6:58p
9h 58m
1 stop
Depart: Tue Mar 21 2017 Return: Wed Mar 22 2017 Trip spans 2 days
United
United
IAD
2:35p
SEA
8:28p
5h 53m
nonstop
SEA
6:15p
IAD
11:10p
4h 55m
nonstop
Depart: Sat May 6 2017 Return: Tue May 9 2017 Trip spans 4 days
Frontier
Frontier
IAD
2:59p
SEA
9:15a
18h 16m
1 stop
SEA
2:54p
IAD
10:19p
7h 25m
1 stop
Depart: Sat May 27 2017 Return: Sat Jun 3 2017 Trip spans 8 days
Major Airline
Major Airline
IAD
9:30a
SEA
3:28p
5h 58m
nonstop
SEA
12:20a
IAD
5:24a
5h 04m
nonstop
Depart: Mon Aug 14 2017 Return: Wed Aug 16 2017 Trip spans 3 days
Delta
Delta
IAD
3:30a
SEA
11:25a
7h 55m
1 stop
SEA
7:25a
IAD
4:08p
8h 43m
1 stop
Depart: Wed Mar 22 2017 Return: Thu Mar 23 2017 Trip spans 2 days
United
United
IAD
2:35p
SEA
8:30p
5h 55m
nonstop
SEA
6:15p
IAD
11:10p
4h 55m
nonstop
Depart: Wed May 31 2017 Return: Sun Jun 4 2017 Trip spans 5 days
Major Airline
Major Airline
IAD
9:30a
SEA
3:28p
5h 58m
nonstop
SEA
12:10a
IAD
5:17a
5h 07m
nonstop
Depart: Fri Apr 21 2017 Return: Tue Apr 25 2017 Trip spans 5 days
Frontier
Frontier
IAD
2:55p
SEA
9:15a
18h 20m
1 stop
SEA
3:10p
IAD
10:19p
7h 09m
1 stop
Depart: Sat Mar 25 2017 Return: Tue Apr 4 2017 Trip spans 11 days
JetBlue
JetBlue
IAD
10:19a
SEA
9:46p
11h 27m
1 stop
SEA
6:26p
IAD
2:24a
7h 58m
1 stop
Depart: Mon Aug 28 2017 Return: Wed Sep 6 2017 Trip spans 10 days
Delta
Delta
IAD
12:50p
SEA
10:47p
9h 57m
1 stop
SEA
7:20p
IAD
1:56a
6h 36m
1 stop
Depart: Mon Mar 13 2017 Return: Tue Mar 28 2017 Trip spans 16 days
Alaska Airlines
Alaska Airlines
IAD
1:30p
SEA
7:28p
5h 58m
nonstop
SEA
4:20a
IAD
9:15a
4h 55m
nonstop
Depart: Thu Mar 23 2017 Return: Mon Mar 27 2017 Trip spans 5 days
United
United
IAD
12:30p
SEA
6:11p
5h 41m
nonstop
SEA
6:15p
IAD
11:10p
4h 55m
nonstop
Depart: Wed Jun 7 2017 Return: Mon Jun 12 2017 Trip spans 6 days
Major Airline
Major Airline
IAD
9:20a
SEA
3:28p
6h 08m
nonstop
SEA
12:10a
IAD
5:17a
5h 07m
nonstop
Direct flights IAD to SEA on United
Flight # Depart IAD Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
389 8:15 am 10:59 am Mar 9 - Mar 9
389 8:15 am 10:59 am Mar 16 - Mar 23
389 8:15 am 10:59 am Mar 30 - Mar 30
389 8:15 am 10:57 am Apr 4 - Apr 21
389 8:40 am 11:24 am Mar 13 - Mar 24
389 8:40 am 11:24 am Mar 10 - Mar 10
389 8:40 am 11:26 am Mar 14 - Mar 21
389 8:40 am 11:24 am Mar 15 - Mar 22
389 8:40 am 11:24 am Mar 27 - Mar 31
389 8:40 am 11:26 am Mar 28 - Mar 28
389 8:40 am 11:24 am Mar 29 - Mar 29
389 8:40 am 11:24 am Apr 3 - Apr 3
389 8:55 am 11:51 am Mar 5 - Mar 6
389 8:55 am 11:51 am Mar 8 - Mar 8
389 8:55 am 11:51 am Feb 21 - Mar 7
1769 4:14 pm 6:58 pm Apr 4 - Apr 18
1769 4:14 pm 6:58 pm Apr 5 - Apr 20
1769 4:30 pm 7:11 pm Mar 28 - Mar 28
1769 4:30 pm 7:11 pm Mar 10 - Mar 10
1769 4:30 pm 7:11 pm Mar 13 - Mar 24
1769 4:30 pm 7:11 pm Mar 27 - Apr 3
1769 4:40 pm 7:21 pm Mar 12 - Mar 19
1769 4:40 pm 7:21 pm Mar 26 - Apr 2
1769 5:30 pm 8:11 pm Mar 9 - Mar 9
326 5:40 pm 8:34 pm Feb 21 - Mar 7
326 5:40 pm 8:34 pm Feb 24 - Mar 5
326 5:40 pm 8:34 pm Feb 27 - Mar 6
326 5:40 pm 8:34 pm Mar 8 - Mar 8
10 5:55 pm 8:49 pm Apr 4 - Apr 10
326 6:25 pm 9:20 pm Mar 11 - Mar 11
326 6:25 pm 9:20 pm Mar 19 - Mar 19
326 6:25 pm 9:20 pm Mar 26 - Apr 2
326 6:35 pm 9:30 pm Mar 9 - Mar 9
326 6:35 pm 9:30 pm Mar 12 - Mar 12
326 6:35 pm 9:30 pm Mar 13 - Mar 13
326 6:35 pm 9:28 pm Mar 14 - Mar 14
326 6:35 pm 9:30 pm Mar 15 - Mar 22
326 6:35 pm 9:30 pm Mar 16 - Mar 23
326 6:35 pm 9:30 pm Mar 18 - Mar 25
326 6:35 pm 9:28 pm Mar 21 - Mar 21
326 6:35 pm 9:30 pm Mar 27 - Apr 3
326 6:35 pm 9:28 pm Mar 28 - Mar 28
326 6:35 pm 9:30 pm Apr 1 - Apr 1
326 6:50 pm 9:45 pm Mar 10 - Mar 10
326 6:50 pm 9:45 pm Mar 17 - Mar 24
326 6:50 pm 9:45 pm Mar 31 - Mar 31
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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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Why aren’t prices accurate 100% of the time?
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Airports
Origin

Washington
$254
Destination

Seattle
$254
Airlines Airline reviews

80 travelers who booked a flight from Washington to Seattle rated their chosen airlines with an average of 7.2.

Overall
7.6
Boarding
7.9
Crew
8.0
Comfort
7.2
Food
6.4
Entertainment
6.2