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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: Tue Apr 21 2015 Return: Tue Apr 28 2015 Trip spans 8 days
United
United
ORD
3:25p
ONT
10:09p
6h 44m
1 stop
ONT
4:39p
ORD
10:46p
6h 07m
1 stop
Depart: Wed Apr 22 2015 Return: Sat Apr 25 2015 Trip spans 4 days
United
United
ORD
1:30p
ONT
9:24p
7h 54m
1 stop
ONT
4:39p
ORD
12:10a
7h 31m
1 stop
Depart: Tue Apr 28 2015 Return: Sat May 2 2015 Trip spans 5 days
United
United
ORD
3:27p
ONT
10:09p
6h 42m
1 stop
ONT
4:39p
ORD
11:20p
6h 41m
1 stop
Depart: Sat May 2 2015 Return: Wed May 13 2015 Trip spans 12 days
United
United
ORD
3:08a
ONT
11:34a
8h 26m
1 stop
ONT
6:43a
ORD
1:38p
6h 55m
1 stop
Depart: Wed May 6 2015 Return: Wed May 13 2015 Trip spans 8 days
United
United
ORD
2:55p
ONT
10:10p
7h 15m
1 stop
ONT
4:39p
ORD
11:14p
6h 35m
1 stop
Depart: Tue May 12 2015 Return: Tue May 19 2015 Trip spans 8 days
United
United
ORD
2:57a
ONT
10:17a
7h 20m
1 stop
ONT
12:40p
ORD
7:35p
6h 55m
1 stop
Depart: Wed May 13 2015 Return: Tue May 19 2015 Trip spans 7 days
United
United
ORD
3:35p
ONT
10:10p
6h 35m
1 stop
ONT
4:39p
ORD
11:13p
6h 34m
1 stop
Depart: Sat Sep 12 2015 Return: Sat Sep 19 2015 Trip spans 8 days
United
United
ORD
5:30a
ONT
2:48p
9h 18m
1 stop
ONT
8:30a
ORD
4:32p
8h 02m
1 stop
Depart: Sat Apr 18 2015 Return: Tue Apr 21 2015 Trip spans 4 days
US Airways
US Airways
ORD
1:00p
ONT
7:06p
6h 06m
1 stop
ONT
8:35a
ORD
2:36p
6h 01m
1 stop
Depart: Sat Apr 25 2015 Return: Tue Apr 28 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
3:00a
ONT
9:33a
6h 33m
1 stop
ONT
8:35a
ORD
2:36p
6h 01m
1 stop
Depart: Wed Apr 29 2015 Return: Sat May 2 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
6:00a
ORD
11:59a
5h 59m
1 stop
Depart: Tue May 5 2015 Return: Sat May 9 2015 Trip spans 5 days
American Airlines
American Airlines
ORD
6:55a
ONT
1:38p
6h 43m
1 stop
ONT
8:35a
ORD
2:46p
6h 11m
1 stop
Depart: Sat May 9 2015 Return: Sat May 16 2015 Trip spans 8 days
American Airlines
American Airlines
ORD
3:42a
ONT
9:33a
5h 51m
1 stop
ONT
8:35a
ORD
2:36p
6h 01m
1 stop
Depart: Sat May 16 2015 Return: Tue May 19 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
12:59p
ONT
7:06p
6h 07m
1 stop
ONT
8:35a
ORD
2:36p
6h 01m
1 stop
Depart: Sat May 23 2015 Return: Wed May 27 2015 Trip spans 5 days
US Airways
US Airways
ORD
12:59p
ONT
7:06p
6h 07m
1 stop
ONT
12:40p
ORD
6:02p
5h 22m
1 stop
Depart: Sat May 30 2015 Return: Sat Jun 6 2015 Trip spans 8 days
American Airlines
American Airlines
ORD
10:05a
ONT
4:05p
6h 00m
1 stop
ONT
8:35a
ORD
2:53p
6h 18m
1 stop
Depart: Mon Apr 20 2015 Return: Sat Apr 25 2015 Trip spans 6 days
United
United
ORD
2:45p
ONT
10:09p
7h 24m
1 stop
ONT
3:18p
ORD
10:30p
7h 12m
1 stop
Depart: Mon May 18 2015 Return: Wed May 27 2015 Trip spans 10 days
United
United
ORD
8:27a
ONT
4:47p
8h 20m
1 stop
ONT
12:40p
ORD
7:33p
6h 53m
1 stop
Depart: Tue Sep 22 2015 Return: Sat Sep 26 2015 Trip spans 5 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 Mar 31 2015 Return: Wed Apr 1 2015 Trip spans 2 days
Delta
Delta
MDW
8:40a
ONT
8:34p
11h 54m
2 stops
ONT
2:15a
MDW
2:03p
11h 48m
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
1024 2:45 pm 5:05 pm Apr 7 - Apr 7
277 2:45 pm 5:05 pm Mar 24 - Apr 6
2281 5:30 pm 7:50 pm Mar 28 - Apr 4
4752 5:45 pm 8:05 pm Apr 8 - Jun 5
Airports
Origin

Chicago
only $271
only $353
Destination

Ontario
$271