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Find Deals on Flights from Chicago to Ontario (CHI - ONT)

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

Book cheap flights from Chicago to Ontario

(Round-trip)
Depart: Tue Aug 25 2015 Return: Sat Aug 29 2015 Trip spans 5 days
US Airways
US Airways
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
8:35a
ORD
2:53p
6h 18m
1 stop
Depart: Fri Aug 28 2015 Return: Mon Aug 31 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
12:40p
ORD
6:12p
5h 32m
1 stop
Depart: Thu Aug 27 2015 Return: Mon Aug 31 2015 Trip spans 5 days
US Airways
US Airways
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
12:40p
ORD
6:12p
5h 32m
1 stop
Depart: Sat Aug 29 2015 Return: Sat Sep 5 2015 Trip spans 8 days
US Airways
US Airways
ORD
1:10a
ONT
9:31a
8h 21m
1 stop
ONT
8:35a
ORD
2:53p
6h 18m
1 stop
Depart: Tue Sep 1 2015 Return: Sat Sep 5 2015 Trip spans 5 days
US Airways
US Airways
ORD
10:05a
ONT
4:04p
5h 59m
1 stop
ONT
8:35a
ORD
2:53p
6h 18m
1 stop
Depart: Wed Sep 2 2015 Return: Sun Sep 6 2015 Trip spans 5 days
American Airlines
American Airlines
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
12:40p
ORD
6:12p
5h 32m
1 stop
Depart: Thu Sep 3 2015 Return: Sun Sep 6 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
2:25a
ORD
8:52a
6h 27m
1 stop
Depart: Fri Sep 4 2015 Return: Sun Sep 6 2015 Trip spans 3 days
American Airlines
American Airlines
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
2:25a
ORD
8:52a
6h 27m
1 stop
Depart: Sat Sep 5 2015 Return: Fri Sep 11 2015 Trip spans 7 days
American Airlines
American Airlines
ORD
1:10a
ONT
7:05a
5h 55m
1 stop
ONT
12:40p
ORD
6:10p
5h 30m
1 stop
Depart: Sun Sep 6 2015 Return: Fri Sep 11 2015 Trip spans 6 days
US Airways
US Airways
ORD
3:10a
ONT
9:31a
6h 21m
1 stop
ONT
12:40p
ORD
6:10p
5h 30m
1 stop
Depart: Wed Sep 9 2015 Return: Fri Sep 11 2015 Trip spans 3 days
American Airlines
American Airlines
ORD
11:30a
ONT
6:57p
7h 27m
1 stop
ONT
8:35a
ORD
2:49p
6h 14m
1 stop
Depart: Thu Sep 10 2015 Return: Sat Sep 12 2015 Trip spans 3 days
American Airlines
American Airlines
ORD
2:25p
ONT
9:04p
6h 39m
1 stop
ONT
6:57a
ORD
2:48p
7h 51m
1 stop
Depart: Fri Sep 11 2015 Return: Sat Sep 12 2015 Trip spans 2 days
US Airways
US Airways
ORD
1:05a
ONT
7:08a
6h 03m
1 stop
ONT
8:35a
ORD
2:49p
6h 14m
1 stop
Depart: Sat Sep 12 2015 Return: Tue Sep 15 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
2:45a
ONT
11:36a
8h 51m
1 stop
ONT
10:23a
ORD
6:28p
8h 05m
1 stop
Depart: Thu Sep 17 2015 Return: Sat Sep 19 2015 Trip spans 3 days
US Airways
US Airways
ORD
1:05a
ONT
7:08a
6h 03m
1 stop
ONT
8:35a
ORD
2:49p
6h 14m
1 stop
Depart: Fri Sep 18 2015 Return: Sat Sep 19 2015 Trip spans 2 days
US Airways
US Airways
ORD
1:05a
ONT
7:08a
6h 03m
1 stop
ONT
8:35a
ORD
2:49p
6h 14m
1 stop
Depart: Wed Sep 23 2015 Return: Tue Sep 29 2015 Trip spans 7 days
American Airlines
American Airlines
ORD
9:30a
ONT
6:06p
8h 36m
1 stop
ONT
10:23a
ORD
6:28p
8h 05m
1 stop
Depart: Sat Oct 24 2015 Return: Tue Oct 27 2015 Trip spans 4 days
Delta
Delta
MDW
2:30a
ONT
10:11a
7h 41m
1 stop
ONT
12:40p
MDW
5:56p
5h 16m
1 stop
Depart: Sat Oct 31 2015 Return: Wed Nov 11 2015 Trip spans 12 days
United
United
ORD
4:30a
ONT
10:38a
6h 08m
1 stop
ONT
12:20p
ORD
6:29p
6h 09m
1 stop
Depart: Mon Oct 26 2015 Return: Sat Oct 31 2015 Trip spans 6 days
Delta
Delta
ORD
2:35p
ONT
8:31p
5h 56m
1 stop
ONT
2:05a
ORD
7:48a
5h 43m
1 stop
Select an airline:  Southwest
Direct flights CHI to ONT on Southwest
Flight # Depart MDW Arrive ONT Sun Mon Tue Wed Thu Fri Sat Valid Between
2674 4:30 pm 6:40 pm Jul 10 - Aug 7
2674 4:30 pm 6:40 pm Jun 28 - Jul 9
2257 7:50 pm 10:00 pm Jul 11 - Aug 8
Airports
Origin

Chicago
only $267
only $297
Destination

Ontario
$267