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Find Deals on Flights 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: Wed Sep 9 2015 Return: Sat Sep 12 2015 Trip spans 4 days
Delta
Delta
ONT
2:15a
SEA
8:23a
6h 08m
1 stop
SEA
2:00a
ONT
8:11a
6h 11m
1 stop
Depart: Sat Sep 12 2015 Return: Tue Sep 15 2015 Trip spans 4 days
US Airways
US Airways
ONT
8:35a
SEA
3:30p
6h 55m
1 stop
SEA
7:25a
ONT
2:06p
6h 41m
1 stop
Depart: Wed Sep 16 2015 Return: Sat Sep 19 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
8:35a
SEA
3:30p
6h 55m
1 stop
SEA
4:25a
ONT
11:09a
6h 44m
1 stop
Depart: Tue Sep 15 2015 Return: Sat Oct 17 2015 Trip spans 33 days
Delta
Delta
ONT
2:20p
SEA
7:13p
4h 53m
1 stop
SEA
12:32p
ONT
5:06p
4h 34m
1 stop
Depart: Tue Sep 22 2015 Return: Sat Sep 26 2015 Trip spans 5 days
Delta
Delta
ONT
6:15a
SEA
10:53a
4h 38m
1 stop
SEA
12:32p
ONT
5:09p
4h 37m
1 stop
Depart: Wed Sep 23 2015 Return: Sat Sep 26 2015 Trip spans 4 days
Delta
Delta
ONT
2:15a
SEA
7:00a
4h 45m
1 stop
SEA
12:32p
ONT
5:09p
4h 37m
1 stop
Depart: Wed Sep 30 2015 Return: Wed Oct 7 2015 Trip spans 8 days
US Airways
US Airways
ONT
8:35a
SEA
3:30p
6h 55m
1 stop
SEA
11:00a
ONT
4:57p
5h 57m
1 stop
Depart: Sat Oct 3 2015 Return: Sat Oct 10 2015 Trip spans 8 days
American Airlines
American Airlines
ONT
6:00a
SEA
12:49p
6h 49m
1 stop
SEA
11:00a
ONT
4:57p
5h 57m
1 stop
Depart: Wed Oct 14 2015 Return: Wed Oct 28 2015 Trip spans 15 days
Delta
Delta
ONT
2:23p
SEA
7:19p
4h 56m
1 stop
SEA
12:30p
ONT
4:41p
4h 11m
1 stop
Depart: Tue Aug 25 2015 Return: Tue Sep 1 2015 Trip spans 8 days
Alaska Airlines
Alaska Airlines
ONT
6:25a
SEA
8:55a
2h 30m
nonstop
SEA
3:05a
ONT
5:35a
2h 30m
nonstop
Depart: Tue Sep 8 2015 Return: Tue Sep 15 2015 Trip spans 8 days
Alaska Airlines
Alaska Airlines
ONT
2:20p
SEA
4:45p
2h 25m
nonstop
SEA
3:05a
ONT
5:35a
2h 30m
nonstop
Depart: Sat Sep 26 2015 Return: Tue Oct 13 2015 Trip spans 18 days
Alaska Airlines
Alaska Airlines
ONT
2:20p
SEA
4:45p
2h 25m
nonstop
SEA
3:05a
ONT
5:34a
2h 29m
nonstop
Depart: Tue Sep 29 2015 Return: Tue Oct 6 2015 Trip spans 8 days
Alaska Airlines
Alaska Airlines
ONT
2:20p
SEA
4:54p
2h 34m
nonstop
SEA
4:25p
ONT
6:50p
2h 25m
nonstop
Depart: Wed Aug 26 2015 Return: Sat Sep 26 2015 Trip spans 32 days
Delta
Delta
ONT
12:30p
SEA
6:50p
6h 20m
1 stop
SEA
12:32p
ONT
5:09p
4h 37m
1 stop
Depart: Fri Sep 18 2015 Return: Sat Sep 26 2015 Trip spans 9 days
Delta
Delta
ONT
2:15a
SEA
8:06a
5h 51m
1 stop
SEA
12:32p
ONT
5:09p
4h 37m
1 stop
Depart: Thu Sep 24 2015 Return: Sat Sep 26 2015 Trip spans 3 days
American Airlines
American Airlines
ONT
8:35a
SEA
3:30p
6h 55m
1 stop
SEA
4:25a
ONT
11:09a
6h 44m
1 stop
Depart: Thu Oct 1 2015 Return: Sat Oct 3 2015 Trip spans 3 days
Delta
Delta
ONT
2:15a
SEA
7:00a
4h 45m
1 stop
SEA
12:32p
ONT
5:06p
4h 34m
1 stop
Depart: Thu Oct 8 2015 Return: Tue Oct 13 2015 Trip spans 6 days
American Airlines
American Airlines
ONT
2:30a
SEA
9:29a
6h 59m
1 stop
SEA
7:25a
ONT
2:06p
6h 41m
1 stop
Depart: Sat Oct 10 2015 Return: Mon Oct 19 2015 Trip spans 10 days
American Airlines
American Airlines
ONT
2:30a
SEA
9:29a
6h 59m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Sat Aug 22 2015 Return: Tue Sep 15 2015 Trip spans 25 days
United
United
ONT
3:01p
SEA
8:51p
5h 50m
1 stop
SEA
1:25a
ONT
5:54a
4h 29m
1 stop
Direct flights ONT to SEA on Delta
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
7570 6:00 am 8:43 am Jul 12 - Jul 19
7570 6:00 am 8:43 am Jul 25 - Jul 31
7570 6:00 am 8:45 am Jul 2 - Jul 11
7631 6:00 am 8:43 am Jul 20 - Jul 24
7631 6:00 am 8:43 am Aug 1 - Aug 14
7574 10:25 am 12:50 pm Aug 7 - Aug 14
7574 10:25 am 12:50 pm Jul 12 - Aug 6
7574 10:25 am 12:58 pm Jul 8 - Jul 10
7574 10:25 am 12:58 pm Jul 7 - Jul 11
Airports
Origin

Ontario
$183
Destination

Seattle
$183