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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: Fri May 1 2015 Return: Tue May 5 2015 Trip spans 5 days
US Airways
US Airways
ONT
8:35a
SEA
3:38p
7h 03m
1 stop
SEA
7:25a
ONT
2:05p
6h 40m
1 stop
Depart: Sat May 2 2015 Return: Mon May 4 2015 Trip spans 3 days
United
United
ONT
4:39p
SEA
8:46p
4h 07m
1 stop
SEA
11:27a
ONT
4:09p
4h 42m
1 stop
Depart: Tue May 5 2015 Return: Thu May 7 2015 Trip spans 3 days
United
United
ONT
1:30a
SEA
6:37a
5h 07m
1 stop
SEA
1:24a
ONT
6:13a
4h 49m
1 stop
Depart: Wed May 6 2015 Return: Sat May 9 2015 Trip spans 4 days
United
United
ONT
12:40p
SEA
6:04p
5h 24m
1 stop
SEA
3:45a
ONT
8:17a
4h 32m
1 stop
Depart: Fri May 8 2015 Return: Sat May 9 2015 Trip spans 2 days
United
United
ONT
1:50p
SEA
7:41p
5h 51m
1 stop
SEA
1:24a
ONT
8:17a
6h 53m
1 stop
Depart: Sat May 9 2015 Return: Sun May 10 2015 Trip spans 2 days
United
United
ONT
12:38p
SEA
4:58p
4h 20m
1 stop
SEA
4:50a
ONT
12:10p
7h 20m
1 stop
Depart: Mon May 11 2015 Return: Tue May 12 2015 Trip spans 2 days
United
United
ONT
12:40p
SEA
6:02p
5h 22m
1 stop
SEA
6:50a
ONT
1:20p
6h 30m
1 stop
Depart: Tue May 12 2015 Return: Thu May 14 2015 Trip spans 3 days
United
United
ONT
3:17p
SEA
8:44p
5h 27m
1 stop
SEA
11:44a
ONT
4:25p
4h 41m
1 stop
Depart: Wed May 13 2015 Return: Sat May 16 2015 Trip spans 4 days
United
United
ONT
12:40p
SEA
6:04p
5h 24m
1 stop
SEA
1:24a
ONT
6:13a
4h 49m
1 stop
Depart: Thu May 14 2015 Return: Mon May 18 2015 Trip spans 5 days
United
United
ONT
3:17p
SEA
7:41p
4h 24m
1 stop
SEA
11:44a
ONT
4:25p
4h 41m
1 stop
Depart: Sat May 16 2015 Return: Mon May 18 2015 Trip spans 3 days
United
United
ONT
12:38p
SEA
6:40p
6h 02m
1 stop
SEA
11:44a
ONT
4:25p
4h 41m
1 stop
Depart: Tue May 19 2015 Return: Sat May 23 2015 Trip spans 5 days
United
United
ONT
12:40p
SEA
7:01p
6h 21m
1 stop
SEA
2:54p
ONT
8:10p
5h 16m
1 stop
Depart: Wed May 20 2015 Return: Sat May 23 2015 Trip spans 4 days
United
United
ONT
3:17p
SEA
8:44p
5h 27m
1 stop
SEA
2:54p
ONT
8:10p
5h 16m
1 stop
Depart: Sat May 23 2015 Return: Wed May 27 2015 Trip spans 5 days
United
United
ONT
1:50p
SEA
8:44p
6h 54m
1 stop
SEA
1:24a
ONT
6:13a
4h 49m
1 stop
Depart: Wed May 27 2015 Return: Tue Jun 2 2015 Trip spans 7 days
United
United
ONT
1:50p
SEA
6:04p
4h 14m
1 stop
SEA
11:44a
ONT
4:25p
4h 41m
1 stop
Depart: Tue Jun 16 2015 Return: Wed Jun 17 2015 Trip spans 2 days
United
United
ONT
12:51p
SEA
7:37p
6h 46m
1 stop
SEA
12:51p
ONT
8:15p
7h 24m
1 stop
Depart: Tue Jun 30 2015 Return: Wed Jul 8 2015 Trip spans 9 days
United
United
ONT
2:07p
SEA
7:07p
5h 00m
1 stop
SEA
8:25a
ONT
2:44p
6h 19m
1 stop
Depart: Wed Jul 1 2015 Return: Wed Jul 8 2015 Trip spans 8 days
United
United
ONT
2:07p
SEA
9:10p
7h 03m
1 stop
SEA
1:20a
ONT
6:01a
4h 41m
1 stop
Depart: Tue Aug 18 2015 Return: Wed Sep 2 2015 Trip spans 16 days
American Airlines
American Airlines
ONT
6:25a
SEA
8:50a
2h 25m
nonstop
SEA
3:05a
ONT
5:35a
2h 30m
nonstop
Depart: Mon Jun 1 2015 Return: Sat Jun 6 2015 Trip spans 6 days
Alaska Airlines
Alaska Airlines
ONT
2:00a
SEA
4:37a
2h 37m
nonstop
SEA
3:25a
ONT
5:47a
2h 22m
nonstop
Direct flights ONT to SEA on Delta
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
9044 6:00 am 8:39 am Apr 27 - May 2
9044 6:00 am 8:37 am May 3 - May 9
9044 6:00 am 8:37 am May 4 - May 10
9044 6:00 am 8:37 am May 7 - May 11
9044 6:00 am 8:37 am May 21 - May 26
9044 6:00 am 8:37 am May 16 - May 23
9044 6:00 am 8:37 am May 24 - May 31
9044 6:00 am 8:37 am May 25 - Jun 1
9044 6:00 am 8:37 am May 29 - Jun 5
9044 6:00 am 8:37 am May 8 - May 15
9099 10:30 am 1:02 pm May 23 - May 23
9099 10:30 am 1:02 pm May 30 - Jun 5
9099 10:30 am 1:02 pm May 22 - May 29
9099 10:30 am 1:02 pm May 15 - May 15
9099 10:30 am 1:02 pm May 11 - May 21
9099 10:30 am 1:02 pm May 4 - May 4
9099 10:30 am 1:02 pm May 3 - May 10
9099 10:30 am 1:05 pm Apr 27 - May 2
Airports
Origin

Ontario
$185
Destination

Seattle
$185