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Find Flight Deals from Ontario to Seattle/Tacoma Intl (ONT - SEA)

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

Book cheap flights from Ontario to Seattle/Tacoma Intl

(Round-trip)
Depart: Sat Jan 24 2015 Return: Tue Jan 27 2015 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
12:20p
SEA
3:09p
2h 49m
nonstop
SEA
3:00a
ONT
5:38a
2h 38m
nonstop
Depart: Wed Jan 28 2015 Return: Tue Feb 3 2015 Trip spans 7 days
Alaska Airlines
Alaska Airlines
ONT
6:10a
SEA
8:53a
2h 43m
nonstop
SEA
3:00a
ONT
5:38a
2h 38m
nonstop
Depart: Sat Jan 31 2015 Return: Tue Feb 3 2015 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
12:20p
SEA
3:09p
2h 49m
nonstop
SEA
3:00a
ONT
5:38a
2h 38m
nonstop
Depart: Tue Feb 3 2015 Return: Sat Feb 7 2015 Trip spans 5 days
Alaska Airlines
Alaska Airlines
ONT
12:20p
SEA
3:09p
2h 49m
nonstop
SEA
9:15a
ONT
11:45a
2h 30m
nonstop
Depart: Wed Feb 4 2015 Return: Sat Feb 7 2015 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
6:10a
SEA
8:53a
2h 43m
nonstop
SEA
9:15a
ONT
11:45a
2h 30m
nonstop
Depart: Tue Jan 13 2015 Return: Sat Jan 17 2015 Trip spans 5 days
Delta
Delta
ONT
5:10a
SEA
9:59a
4h 49m
1 stop
SEA
11:25a
ONT
4:06p
4h 41m
1 stop
Depart: Wed Jan 14 2015 Return: Wed Jan 21 2015 Trip spans 8 days
Delta
Delta
ONT
1:15a
SEA
7:29a
6h 14m
1 stop
SEA
12:15p
ONT
4:49p
4h 34m
1 stop
Depart: Wed Jan 21 2015 Return: Sat Jan 24 2015 Trip spans 4 days
Delta
Delta
ONT
5:10a
SEA
9:59a
4h 49m
1 stop
SEA
11:25a
ONT
4:43p
5h 18m
1 stop
Depart: Tue Jan 27 2015 Return: Tue Feb 3 2015 Trip spans 8 days
Delta
Delta
ONT
1:15a
SEA
7:29a
6h 14m
1 stop
SEA
12:15p
ONT
4:49p
4h 34m
1 stop
Depart: Fri Jan 9 2015 Return: Tue Jan 13 2015 Trip spans 5 days
Delta
Delta
ONT
11:27a
SEA
4:24p
4h 57m
1 stop
SEA
12:15p
ONT
4:49p
4h 34m
1 stop
Depart: Mon Jan 26 2015 Return: Tue Feb 3 2015 Trip spans 9 days
Delta
Delta
ONT
11:27a
SEA
6:16p
6h 49m
1 stop
SEA
12:15p
ONT
4:49p
4h 34m
1 stop
Depart: Thu Jan 29 2015 Return: Wed Feb 4 2015 Trip spans 7 days
Delta
Delta
ONT
1:15a
SEA
7:29a
6h 14m
1 stop
SEA
12:15p
ONT
4:49p
4h 34m
1 stop
Depart: Thu Feb 5 2015 Return: Sat Feb 7 2015 Trip spans 3 days
Delta
Delta
ONT
1:15a
SEA
7:29a
6h 14m
1 stop
SEA
11:25a
ONT
4:43p
5h 18m
1 stop
Depart: Thu Jan 15 2015 Return: Mon Jan 19 2015 Trip spans 5 days
US Airways
US Airways
ONT
7:40a
SEA
2:44p
7h 04m
1 stop
SEA
12:15a
ONT
6:34a
6h 19m
1 stop
Depart: Mon Jan 12 2015 Return: Sun Jan 18 2015 Trip spans 7 days
Delta
Delta
ONT
11:27a
SEA
4:24p
4h 57m
1 stop
SEA
11:22a
ONT
4:09p
4h 47m
1 stop
Depart: Thu Jan 22 2015 Return: Sun Jan 25 2015 Trip spans 4 days
US Airways
US Airways
ONT
7:40a
SEA
2:44p
7h 04m
1 stop
SEA
6:30a
ONT
1:46p
7h 16m
1 stop
Depart: Fri Jan 23 2015 Return: Mon Jan 26 2015 Trip spans 4 days
Delta
Delta
ONT
1:15a
SEA
7:29a
6h 14m
1 stop
SEA
1:05p
ONT
5:35p
4h 30m
1 stop
Depart: Tue Mar 31 2015 Return: Wed Apr 8 2015 Trip spans 9 days
American Airlines
American Airlines
ONT
2:20a
SEA
4:58a
2h 38m
nonstop
SEA
3:15a
ONT
5:43a
2h 28m
nonstop
Depart: Thu Jan 8 2015 Return: Fri Jan 9 2015 Trip spans 2 days
Multiple Airlines
Multiple Airlines
ONT
1:30a
SEA
8:39a
7h 09m
1 stop
SEA
11:22a
ONT
5:35p
6h 13m
1 stop
Depart: Sun Mar 1 2015 Return: Wed Mar 4 2015 Trip spans 4 days
United
United
ONT
12:30p
SEA
7:45p
7h 15m
1 stop
SEA
12:20a
ONT
6:05a
5h 45m
1 stop
Change your search
Direct flights ONT to SEA on Delta
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
9044 6:20 am 9:00 am Dec 28 - Dec 28
9044 6:20 am 9:00 am Dec 29 - Dec 29
9044 6:20 am 9:00 am Dec 30 - Jan 3
9044 6:20 am 9:00 am Dec 27 - Jan 1
9044 6:20 am 9:00 am Jan 4 - Jan 4
9099 10:25 am 1:03 pm Jan 5 - Jan 5
9099 10:25 am 1:03 pm Dec 31 - Jan 1
9099 10:25 am 1:03 pm Dec 30 - Jan 4
9099 10:25 am 1:08 pm Dec 28 - Jan 2
9099 10:25 am 1:03 pm Jan 3 - Jan 3
7498 11:10 am 1:53 pm Jan 11 - Feb 7
7502 11:10 am 1:55 pm Jan 6 - Jan 10
Airports
Origin

Ontario
$174
Destination

Seattle
$174