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Find Flight Deals 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: Wed Jun 24 2015 Return: Sat Jul 4 2015 Trip spans 11 days
American Airlines
American Airlines
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
6:55a
ORD
1:16p
6h 21m
1 stop
Depart: Sat Jul 4 2015 Return: Tue Jul 14 2015 Trip spans 11 days
US Airways
US Airways
ORD
1:05a
ONT
8:12a
7h 07m
1 stop
ONT
2:25a
ORD
9:59a
7h 34m
1 stop
Depart: Wed Aug 12 2015 Return: Tue Aug 18 2015 Trip spans 7 days
United
United
ORD
2:00a
ONT
11:29a
9h 29m
1 stop
ONT
1:20p
ORD
7:09p
5h 49m
1 stop
Depart: Wed Sep 16 2015 Return: Sat Sep 19 2015 Trip spans 4 days
Delta
Delta
ORD
12:40p
ONT
8:26p
7h 46m
1 stop
ONT
2:05a
ORD
9:04a
6h 59m
1 stop
Depart: Tue Jun 30 2015 Return: Sat Jul 4 2015 Trip spans 5 days
American Airlines
American Airlines
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
6:55a
ORD
1:16p
6h 21m
1 stop
Depart: Wed Jul 8 2015 Return: Tue Jul 14 2015 Trip spans 7 days
US Airways
US Airways
ORD
1:10a
ONT
7:04a
5h 54m
1 stop
ONT
2:25a
ORD
9:59a
7h 34m
1 stop
Depart: Tue Aug 4 2015 Return: Wed Sep 2 2015 Trip spans 30 days
US Airways
US Airways
ORD
2:50p
ONT
9:57p
7h 07m
1 stop
ONT
2:25a
ORD
8:52a
6h 27m
1 stop
Depart: Wed Aug 5 2015 Return: Sat Aug 22 2015 Trip spans 18 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: Tue Aug 11 2015 Return: Sat Aug 22 2015 Trip spans 12 days
US Airways
US Airways
ORD
1:10a
ONT
9:31a
8h 21m
1 stop
ONT
12:40p
ORD
6:12p
5h 32m
1 stop
Depart: Tue Aug 18 2015 Return: Sat Aug 22 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: Wed Aug 19 2015 Return: Sat Aug 22 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
10:05a
ONT
4:04p
5h 59m
1 stop
ONT
12:40p
ORD
6:12p
5h 32m
1 stop
Depart: Thu Aug 20 2015 Return: Sat Aug 22 2015 Trip spans 3 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: Tue Sep 1 2015 Return: Sun Sep 6 2015 Trip spans 6 days
United
United
ORD
7:20a
ONT
2:48p
7h 28m
1 stop
ONT
6:40a
ORD
3:49p
9h 09m
1 stop
Depart: Sat Sep 5 2015 Return: Sat Sep 12 2015 Trip spans 8 days
US Airways
US Airways
ORD
1:00a
ONT
9:31a
8h 31m
1 stop
ONT
2:28a
ORD
8:49a
6h 21m
1 stop
Depart: Thu Sep 10 2015 Return: Fri Sep 11 2015 Trip spans 2 days
United
United
ORD
4:30a
ONT
10:38a
6h 08m
1 stop
ONT
1:20p
ORD
7:09p
5h 49m
1 stop
Depart: Sat Sep 12 2015 Return: Mon Sep 14 2015 Trip spans 3 days
United
United
ORD
9:45a
ONT
4:33p
6h 48m
1 stop
ONT
1:20p
ORD
7:09p
5h 49m
1 stop
Depart: Thu Sep 17 2015 Return: Sun Sep 20 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
1:00a
ONT
7:03a
6h 03m
1 stop
ONT
3:30p
ORD
9:08p
5h 38m
1 stop
Depart: Sun Sep 20 2015 Return: Wed Sep 23 2015 Trip spans 4 days
US Airways
US Airways
ORD
1:00a
ONT
7:03a
6h 03m
1 stop
ONT
2:28a
ORD
10:00a
7h 32m
1 stop
Depart: Mon Sep 21 2015 Return: Mon Sep 28 2015 Trip spans 8 days
American Airlines
American Airlines
ORD
1:00a
ONT
7:03a
6h 03m
1 stop
ONT
3:30p
ORD
9:08p
5h 38m
1 stop
Depart: Thu Nov 19 2015 Return: Sat Nov 28 2015 Trip spans 10 days
Delta
Delta
MDW
1:43a
ONT
1:20p
11h 37m
2 stops
ONT
1:05a
MDW
11:47a
10h 42m
2 stops
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 Jun 7 - Jul 2
4752 5:45 pm 8:05 pm May 21 - Jun 5
2257 7:50 pm 10:00 pm Jun 13 - Jun 27
Airports
Origin

Chicago
only $333
only $599
Destination

Ontario
$333