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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 Apr 25 2015 Return: Tue Apr 28 2015 Trip spans 4 days
US Airways
US Airways
ONT
8:40a
SEA
3:38p
6h 58m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Tue Apr 7 2015 Return: Mon May 4 2015 Trip spans 28 days
United
United
ONT
5:35a
SEA
1:04p
7h 29m
1 stop
SEA
9:00a
ONT
2:47p
5h 47m
1 stop
Depart: Wed Apr 8 2015 Return: Tue May 5 2015 Trip spans 28 days
United
United
ONT
1:30a
SEA
6:38a
5h 08m
1 stop
SEA
8:17a
ONT
2:47p
6h 30m
1 stop
Depart: Tue Apr 28 2015 Return: Wed May 13 2015 Trip spans 16 days
US Airways
US Airways
ONT
8:35a
SEA
3:38p
7h 03m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Wed Apr 29 2015 Return: Thu May 14 2015 Trip spans 16 days
United
United
ONT
4:39p
SEA
8:45p
4h 06m
1 stop
SEA
1:24a
ONT
6:13a
4h 49m
1 stop
Depart: Thu Apr 30 2015 Return: Tue May 5 2015 Trip spans 6 days
United
United
ONT
6:45a
SEA
1:04p
6h 19m
1 stop
SEA
11:27a
ONT
4:09p
4h 42m
1 stop
Depart: Fri May 1 2015 Return: Mon May 4 2015 Trip spans 4 days
United
United
ONT
4:39p
SEA
8:45p
4h 06m
1 stop
SEA
8:22a
ONT
2:47p
6h 25m
1 stop
Depart: Sat May 2 2015 Return: Mon May 4 2015 Trip spans 3 days
United
United
ONT
1:30a
SEA
6:08a
4h 38m
1 stop
SEA
8:22a
ONT
2:47p
6h 25m
1 stop
Depart: Mon May 4 2015 Return: Mon May 18 2015 Trip spans 15 days
United
United
ONT
3:18p
SEA
7:39p
4h 21m
1 stop
SEA
3:45p
ONT
8:10p
4h 25m
1 stop
Depart: Fri May 8 2015 Return: Sat May 16 2015 Trip spans 9 days
United
United
ONT
3:17p
SEA
7:41p
4h 24m
1 stop
SEA
1:24a
ONT
6:13a
4h 49m
1 stop
Depart: Wed May 13 2015 Return: Sat May 16 2015 Trip spans 4 days
United
United
ONT
8:47a
SEA
4:07p
7h 20m
1 stop
SEA
1:24a
ONT
6:13a
4h 49m
1 stop
Depart: Thu May 14 2015 Return: Sun May 17 2015 Trip spans 4 days
United
United
ONT
3:17p
SEA
8:45p
5h 28m
1 stop
SEA
3:45a
ONT
8:17a
4h 32m
1 stop
Depart: Tue May 5 2015 Return: Wed May 6 2015 Trip spans 2 days
Alaska Airlines
Alaska Airlines
ONT
6:30a
SEA
9:02a
2h 32m
nonstop
SEA
3:25a
ONT
5:47a
2h 22m
nonstop
Depart: Wed Apr 22 2015 Return: Wed Apr 29 2015 Trip spans 8 days
US Airways
US Airways
ONT
8:35a
SEA
3:38p
7h 03m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Sat May 9 2015 Return: Tue May 12 2015 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
2:00a
SEA
4:37a
2h 37m
nonstop
SEA
3:25a
ONT
5:47a
2h 22m
nonstop
Depart: Sat May 16 2015 Return: Tue May 19 2015 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
2:00a
SEA
4:37a
2h 37m
nonstop
SEA
3:25a
ONT
5:47a
2h 22m
nonstop
Depart: Tue Jun 2 2015 Return: Wed Jun 24 2015 Trip spans 23 days
US Airways
US Airways
ONT
12:40p
SEA
7:07p
6h 27m
1 stop
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
Depart: Wed Jun 3 2015 Return: Tue Jun 9 2015 Trip spans 7 days
US Airways
US Airways
ONT
8:35a
SEA
3:38p
7h 03m
1 stop
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
Depart: Tue Aug 25 2015 Return: Wed Sep 2 2015 Trip spans 9 days
Delta
Delta
ONT
2:15p
SEA
6:55p
4h 40m
1 stop
SEA
9:00a
ONT
1:39p
4h 39m
1 stop
Depart: Sat Jun 6 2015 Return: Sat Jun 13 2015 Trip spans 8 days
American Airlines
American Airlines
ONT
6:00a
SEA
12:44p
6h 44m
1 stop
SEA
3:00a
ONT
5:35a
2h 35m
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 6 - Apr 11
9044 6:00 am 8:39 am Apr 7 - Apr 7
9044 6:00 am 8:39 am Apr 12 - Apr 19
9044 6:00 am 8:39 am Apr 16 - Apr 23
9044 6:00 am 8:39 am Apr 17 - Apr 17
9044 6:00 am 8:39 am Apr 18 - Apr 20
9044 6:00 am 8:39 am Apr 24 - Apr 26
9044 6:00 am 8:39 am Apr 27 - May 2
9044 6:00 am 8:39 am Apr 28 - Apr 28
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 8:38 am Apr 4 - Apr 4
9044 6:00 am 8:39 am Apr 5 - Apr 10
9044 6:00 am 8:39 am Apr 14 - Apr 14
9044 6:00 am 8:39 am May 1 - May 1
9099 10:30 am 1:05 pm Apr 9 - Apr 13
9099 10:30 am 1:05 pm Apr 8 - Apr 15
9099 10:30 am 1:05 pm Apr 6 - Apr 6
9099 10:30 am 1:05 pm Apr 27 - May 2
9099 10:30 am 1:05 pm Mar 31 - Apr 7
9099 10:30 am 1:05 pm Mar 26 - Apr 4
9099 10:30 am 1:02 pm May 3 - May 10
9099 10:30 am 1:05 pm Apr 17 - Apr 24
9099 10:30 am 1:02 pm May 4 - May 4
9099 10:30 am 1:05 pm Apr 29 - May 1
9099 10:30 am 1:05 pm Apr 16 - Apr 16
9099 10:30 am 1:05 pm Apr 20 - Apr 26
9099 10:30 am 1:05 pm Apr 19 - Apr 23
9099 10:30 am 1:05 pm Apr 18 - Apr 18
Airports
Origin

Ontario
$183
Destination

Seattle
$183