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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 28 2015 Return: Fri May 1 2015 Trip spans 4 days
American Airlines
American Airlines
ORD
1:00a
ONT
9:33a
8h 33m
1 stop
ONT
6:00a
ORD
11:59a
5h 59m
1 stop
Depart: Sun Mar 8 2015 Return: Tue Mar 17 2015 Trip spans 10 days
US Airways
US Airways
ORD
3:00a
ONT
9:34a
6h 34m
1 stop
ONT
10:55a
ORD
4:52p
5h 57m
1 stop
Depart: Mon Mar 16 2015 Return: Wed Mar 18 2015 Trip spans 3 days
Delta
Delta
ORD
12:40p
ONT
8:34p
7h 54m
1 stop
ONT
2:15a
ORD
9:28a
7h 13m
1 stop
Depart: Mon Mar 9 2015 Return: Tue Mar 17 2015 Trip spans 9 days
American Airlines
American Airlines
ORD
1:55p
ONT
9:16p
7h 21m
1 stop
ONT
10:55a
ORD
5:34p
6h 39m
1 stop
Depart: Tue Mar 10 2015 Return: Tue Mar 17 2015 Trip spans 8 days
American Airlines
American Airlines
ORD
4:18a
ONT
12:14p
7h 56m
1 stop
ONT
8:30a
ORD
3:57p
7h 27m
1 stop
Depart: Wed Mar 11 2015 Return: Tue Mar 17 2015 Trip spans 7 days
American Airlines
American Airlines
ORD
1:55p
ONT
9:16p
7h 21m
1 stop
ONT
10:55a
ORD
4:52p
5h 57m
1 stop
Depart: Tue Mar 17 2015 Return: Wed Mar 18 2015 Trip spans 2 days
American Airlines
American Airlines
ORD
1:05p
ONT
7:11p
6h 06m
1 stop
ONT
8:30a
ORD
4:52p
8h 22m
1 stop
Depart: Mon Mar 23 2015 Return: Wed Mar 25 2015 Trip spans 3 days
American Airlines
American Airlines
ORD
1:55p
ONT
9:16p
7h 21m
1 stop
ONT
10:55a
ORD
5:34p
6h 39m
1 stop
Depart: Tue Mar 24 2015 Return: Thu Mar 26 2015 Trip spans 3 days
US Airways
US Airways
ORD
12:15p
ONT
7:11p
6h 56m
1 stop
ONT
10:55a
ORD
5:34p
6h 39m
1 stop
Depart: Tue Apr 7 2015 Return: Tue Apr 14 2015 Trip spans 8 days
US Airways
US Airways
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
8:35a
ORD
2:46p
6h 11m
1 stop
Depart: Thu Apr 9 2015 Return: Tue Apr 14 2015 Trip spans 6 days
American Airlines
American Airlines
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
8:35a
ORD
2:46p
6h 11m
1 stop
Depart: Tue Apr 14 2015 Return: Sat Apr 18 2015 Trip spans 5 days
American Airlines
American Airlines
ORD
3:42a
ONT
9:33a
5h 51m
1 stop
ONT
6:55a
ORD
2:06p
7h 11m
1 stop
Depart: Thu Apr 16 2015 Return: Sat Apr 18 2015 Trip spans 3 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: Fri Apr 17 2015 Return: Tue Apr 21 2015 Trip spans 5 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: Sat Apr 18 2015 Return: Thu Apr 23 2015 Trip spans 6 days
US Airways
US Airways
ORD
1:00a
ONT
9:33a
8h 33m
1 stop
ONT
2:30a
ORD
8:49a
6h 19m
1 stop
Depart: Tue Apr 21 2015 Return: Sat Apr 25 2015 Trip spans 5 days
American Airlines
American Airlines
ORD
3:42a
ONT
9:33a
5h 51m
1 stop
ONT
3:40a
ORD
10:20a
6h 40m
1 stop
Depart: Wed Apr 22 2015 Return: Wed Apr 29 2015 Trip spans 8 days
US Airways
US Airways
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
ONT
6:00a
ORD
11:59a
5h 59m
1 stop
Depart: Thu Apr 23 2015 Return: Fri May 1 2015 Trip spans 9 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: Fri Mar 6 2015 Return: Wed Mar 11 2015 Trip spans 5 days
United
United
ORD
1:00a
ONT
8:10a
7h 10m
1 stop
ONT
5:10a
ORD
12:04p
6h 54m
1 stop
Depart: Thu Mar 26 2015 Return: Tue Apr 7 2015 Trip spans 13 days
Alaska Airlines
Alaska Airlines
ORD
2:00a
ONT
9:21p
19h 21m
1 stop
ONT
2:00a
ORD
5:48p
15h 48m
1 stop
Change your search
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
4639 8:40 am 11:05 am Feb 26 - Mar 6
277 2:45 pm 5:05 pm Mar 8 - Apr 6
2281 5:30 pm 7:50 pm Mar 14 - Apr 4
316 5:30 pm 7:50 pm Mar 7 - Mar 7
Airports
Origin

Chicago
$276
Destination

Ontario
$276