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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: Wed Aug 26 2015 Trip spans 2 days
United
United
ORD
3:10a
ONT
10:12a
7h 02m
1 stop
ONT
6:24a
ORD
1:15p
6h 51m
1 stop
Depart: Wed Aug 26 2015 Return: Tue Sep 8 2015 Trip spans 14 days
United
United
ORD
7:29a
ONT
2:32p
7h 03m
1 stop
ONT
1:05p
ORD
7:29p
6h 24m
1 stop
Depart: Sat Sep 5 2015 Return: Tue Sep 15 2015 Trip spans 11 days
United
United
ORD
1:15a
ONT
8:44a
7h 29m
1 stop
ONT
4:46a
ORD
12:12p
7h 26m
1 stop
Depart: Wed Sep 23 2015 Return: Sat Sep 26 2015 Trip spans 4 days
United
United
ORD
3:04a
ONT
10:12a
7h 08m
1 stop
ONT
8:39a
ORD
4:29p
7h 50m
1 stop
Depart: Wed Sep 30 2015 Return: Tue Oct 6 2015 Trip spans 7 days
United
United
ORD
9:45a
ONT
4:30p
6h 45m
1 stop
ONT
4:57p
ORD
11:20p
6h 23m
1 stop
Depart: Sat Oct 3 2015 Return: Tue Oct 6 2015 Trip spans 4 days
United
United
ORD
3:04a
ONT
10:09a
7h 05m
1 stop
ONT
4:57p
ORD
11:20p
6h 23m
1 stop
Depart: Wed Oct 7 2015 Return: Wed Oct 14 2015 Trip spans 8 days
United
United
ORD
1:35p
ONT
10:29p
8h 54m
1 stop
ONT
8:39a
ORD
5:42p
9h 03m
1 stop
Depart: Sat Oct 10 2015 Return: Sat Oct 17 2015 Trip spans 8 days
United
United
ORD
11:06a
ONT
6:27p
7h 21m
1 stop
ONT
3:00p
ORD
11:33p
8h 33m
1 stop
Depart: Sat Aug 29 2015 Return: Sun Aug 30 2015 Trip spans 2 days
United
United
ORD
12:02p
ONT
8:32p
8h 30m
1 stop
ONT
4:46a
ORD
1:15p
8h 29m
1 stop
Depart: Sat Oct 31 2015 Return: Thu Nov 12 2015 Trip spans 13 days
United
United
ORD
3:00a
ONT
9:58a
6h 58m
1 stop
ONT
6:35a
ORD
1:10p
6h 35m
1 stop
Depart: Fri Nov 27 2015 Return: Tue Dec 1 2015 Trip spans 5 days
United
United
ORD
3:00a
ONT
11:38a
8h 38m
1 stop
ONT
12:20p
ORD
6:29p
6h 09m
1 stop
Depart: Fri Dec 4 2015 Return: Tue Dec 15 2015 Trip spans 12 days
United
United
ORD
9:30a
ONT
5:15p
7h 45m
1 stop
ONT
12:20p
ORD
6:09p
5h 49m
1 stop
Depart: Sat Aug 15 2015 Return: Sat Sep 12 2015 Trip spans 29 days
US Airways
US Airways
ORD
1:10a
ONT
7:05a
5h 55m
1 stop
ONT
8:35a
ORD
2:49p
6h 14m
1 stop
Depart: Tue Sep 8 2015 Return: Sat Sep 12 2015 Trip spans 5 days
American Airlines
American Airlines
ORD
2:25p
ONT
8:58p
6h 33m
1 stop
ONT
8:35a
ORD
2:49p
6h 14m
1 stop
Depart: Thu Aug 27 2015 Return: Sat Sep 5 2015 Trip spans 10 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: Sat Sep 5 2015 Trip spans 9 days
US Airways
US Airways
ORD
1:10a
ONT
7:09a
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
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: Thu Sep 3 2015 Return: Wed Sep 9 2015 Trip spans 7 days
US Airways
US Airways
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
8:35a
ORD
2:49p
6h 14m
1 stop
Depart: Sat Oct 24 2015 Return: Sat Oct 31 2015 Trip spans 8 days
Delta
Delta
ORD
12:54p
ONT
7:06p
6h 12m
1 stop
ONT
2:05a
ORD
7:48a
5h 43m
1 stop
Depart: Wed Aug 19 2015 Return: Tue Aug 25 2015 Trip spans 7 days
Delta
Delta
MDW
8:19a
ONT
8:42p
12h 23m
2 stops
ONT
12:30p
MDW
6:03p
5h 33m
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
2946 8:25 am 10:40 am Aug 9 - Sep 4
2674 4:30 pm 6:40 pm Jul 10 - Aug 7
2257 7:50 pm 10:00 pm Jul 11 - Aug 8
Airports
Origin

Chicago
only $251
only $347
Destination

Ontario
$251