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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: Sat Apr 18 2015 Return: Tue Apr 28 2015 Trip spans 11 days
US Airways
US Airways
ORD
3:42a
ONT
9:33a
5h 51m
1 stop
ONT
8:35a
ORD
2:46p
6h 11m
1 stop
Depart: Tue Apr 21 2015 Return: Tue Apr 28 2015 Trip spans 8 days
American Airlines
American Airlines
ORD
1:45p
ONT
9:20p
7h 35m
1 stop
ONT
8:35a
ORD
2:46p
6h 11m
1 stop
Depart: Wed Apr 22 2015 Return: Sat May 2 2015 Trip spans 11 days
US Airways
US Airways
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
8:40a
ORD
2:36p
5h 56m
1 stop
Depart: Sat Apr 25 2015 Return: Tue May 5 2015 Trip spans 11 days
US Airways
US Airways
ORD
12:55p
ONT
7:06p
6h 11m
1 stop
ONT
12:40p
ORD
6:08p
5h 28m
1 stop
Depart: Tue Apr 28 2015 Return: Sat May 9 2015 Trip spans 12 days
US Airways
US Airways
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
8:35a
ORD
2:36p
6h 01m
1 stop
Depart: Wed Apr 29 2015 Return: Sat May 9 2015 Trip spans 11 days
US Airways
US Airways
ORD
3:00a
ONT
9:33a
6h 33m
1 stop
ONT
10:20a
ORD
5:02p
6h 42m
1 stop
Depart: Sat May 2 2015 Return: Tue May 12 2015 Trip spans 11 days
US Airways
US Airways
ORD
12:55p
ONT
7:06p
6h 11m
1 stop
ONT
8:35a
ORD
2:36p
6h 01m
1 stop
Depart: Tue May 19 2015 Return: Sat May 23 2015 Trip spans 5 days
American Airlines
American Airlines
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
10:20a
ORD
6:06p
7h 46m
1 stop
Depart: Wed May 20 2015 Return: Sat May 23 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
10:20a
ORD
5:02p
6h 42m
1 stop
Depart: Sat May 23 2015 Return: Wed May 27 2015 Trip spans 5 days
American Airlines
American Airlines
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
12:40p
ORD
6:02p
5h 22m
1 stop
Depart: Sun Apr 5 2015 Return: Sat Apr 18 2015 Trip spans 14 days
US Airways
US Airways
ORD
3:42a
ONT
9:33a
5h 51m
1 stop
ONT
12:40p
ORD
6:08p
5h 28m
1 stop
Depart: Tue Apr 7 2015 Return: Sat Apr 18 2015 Trip spans 12 days
US Airways
US Airways
ORD
10:05a
ONT
4:05p
6h 00m
1 stop
ONT
12:40p
ORD
6:08p
5h 28m
1 stop
Depart: Wed Apr 8 2015 Return: Sat Apr 18 2015 Trip spans 11 days
US Airways
US Airways
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
12:40p
ORD
6:08p
5h 28m
1 stop
Depart: Thu Apr 9 2015 Return: Tue Apr 21 2015 Trip spans 13 days
US Airways
US Airways
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
12:40p
ORD
6:08p
5h 28m
1 stop
Depart: Mon Apr 13 2015 Return: Sat Apr 25 2015 Trip spans 13 days
US Airways
US Airways
ORD
1:00a
ONT
7:06a
6h 06m
1 stop
ONT
3:40a
ORD
10:20a
6h 40m
1 stop
Depart: Tue Apr 14 2015 Return: Sat Apr 25 2015 Trip spans 12 days
US Airways
US Airways
ORD
1:00p
ONT
7:06p
6h 06m
1 stop
ONT
8:40a
ORD
2:46p
6h 06m
1 stop
Depart: Wed Apr 15 2015 Return: Sat Apr 25 2015 Trip spans 11 days
US Airways
US Airways
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
2:30a
ORD
8:49a
6h 19m
1 stop
Depart: Mon May 4 2015 Return: Fri May 8 2015 Trip spans 5 days
United
United
ORD
3:10p
ONT
9:24p
6h 14m
1 stop
ONT
12:40p
ORD
7:35p
6h 55m
1 stop
Depart: Tue May 5 2015 Return: Wed May 6 2015 Trip spans 2 days
Delta
Delta
ORD
2:35p
ONT
8:43p
6h 08m
1 stop
ONT
6:05a
ORD
11:55a
5h 50m
1 stop
Depart: Mon Mar 30 2015 Return: Wed Apr 15 2015 Trip spans 17 days
Delta
Delta
MDW
1:14p
ONT
8:34p
7h 20m
2 stops
ONT
2:15a
MDW
11:57a
9h 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
1024 2:45 pm 5:05 pm Apr 7 - Apr 7
277 2:45 pm 5:05 pm Mar 26 - Apr 6
4752 5:45 pm 8:05 pm Apr 8 - Jun 5
Airports
Origin

Chicago
only $311
only $388
Destination

Ontario
$311