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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 Feb 17 2015 Return: Sat Feb 21 2015 Trip spans 5 days
US Airways
US Airways
ORD
2:00a
ONT
8:34a
6h 34m
1 stop
ONT
7:40a
ORD
1:41p
6h 01m
1 stop
Depart: Sat Feb 21 2015 Return: Tue Feb 24 2015 Trip spans 4 days
US Airways
US Airways
ORD
9:05a
ONT
3:05p
6h 00m
1 stop
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
Depart: Tue Feb 24 2015 Return: Sat Feb 28 2015 Trip spans 5 days
US Airways
US Airways
ORD
9:05a
ONT
3:05p
6h 00m
1 stop
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
Depart: Sat Feb 28 2015 Return: Tue Mar 3 2015 Trip spans 4 days
US Airways
US Airways
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
Depart: Tue Mar 3 2015 Return: Sat Mar 7 2015 Trip spans 5 days
US Airways
US Airways
ORD
9:05a
ONT
3:05p
6h 00m
1 stop
ONT
11:55a
ORD
5:02p
5h 07m
1 stop
Depart: Wed Mar 4 2015 Return: Sat Mar 7 2015 Trip spans 4 days
US Airways
US Airways
ORD
12:05p
ONT
6:11p
6h 06m
1 stop
ONT
11:55a
ORD
5:02p
5h 07m
1 stop
Depart: Tue Feb 10 2015 Return: Fri Feb 13 2015 Trip spans 4 days
US Airways
US Airways
ORD
9:05a
ONT
3:21p
6h 16m
1 stop
ONT
4:56p
ORD
10:38p
5h 42m
1 stop
Depart: Wed Feb 11 2015 Return: Fri Feb 13 2015 Trip spans 3 days
US Airways
US Airways
ORD
2:00a
ONT
8:34a
6h 34m
1 stop
ONT
4:56p
ORD
10:38p
5h 42m
1 stop
Depart: Fri Feb 20 2015 Return: Sat Feb 28 2015 Trip spans 9 days
US Airways
US Airways
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
Depart: Mon Feb 23 2015 Return: Tue Mar 3 2015 Trip spans 9 days
US Airways
US Airways
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
ONT
5:00a
ORD
10:56a
5h 56m
1 stop
Depart: Thu Feb 26 2015 Return: Sat Feb 28 2015 Trip spans 3 days
US Airways
US Airways
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
ONT
7:40a
ORD
1:41p
6h 01m
1 stop
Depart: Mon Mar 2 2015 Return: Thu Mar 5 2015 Trip spans 4 days
US Airways
US Airways
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
Depart: Thu Mar 5 2015 Return: Thu Mar 12 2015 Trip spans 7 days
US Airways
US Airways
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
ONT
5:56p
ORD
11:18p
5h 22m
1 stop
Depart: Mon Mar 16 2015 Return: Fri Mar 20 2015 Trip spans 5 days
US Airways
US Airways
ORD
1:00a
ONT
7:06a
6h 06m
1 stop
ONT
5:56p
ORD
11:18p
5h 22m
1 stop
Depart: Tue Feb 3 2015 Return: Sat Feb 7 2015 Trip spans 5 days
US Airways
US Airways
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
Depart: Sat Jan 31 2015 Return: Sat Feb 7 2015 Trip spans 8 days
American Airlines
American Airlines
ORD
1:45p
ONT
8:21p
6h 36m
1 stop
ONT
1:00a
ORD
8:34a
7h 34m
1 stop
Depart: Sun Feb 8 2015 Return: Wed Feb 11 2015 Trip spans 4 days
United
United
ORD
3:40a
ONT
11:21a
7h 41m
1 stop
ONT
1:13p
ORD
9:45p
8h 32m
1 stop
Depart: Thu Mar 12 2015 Return: Tue Mar 17 2015 Trip spans 6 days
Multiple Airlines
Multiple Airlines
ORD
1:00a
ONT
9:34a
8h 34m
1 stop
ONT
3:00p
ORD
12:44a
9h 44m
1 stop
Depart: Sat May 30 2015 Return: Wed Jun 3 2015 Trip spans 5 days
Delta
Delta
ORD
9:35a
ONT
6:41p
9h 06m
1 stop
ONT
6:20a
ORD
11:47a
5h 27m
1 stop
Depart: Mon Jun 1 2015 Return: Fri Jun 5 2015 Trip spans 5 days
Delta
Delta
MDW
1:10p
ONT
8:26p
7h 16m
2 stops
ONT
2:20a
MDW
2:53p
12h 33m
2 stops
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 9 - Mar 6
4639 8:40 am 11:05 am Feb 6 - Feb 8
4639 8:40 am 11:05 am Jan 30 - Feb 5
4639 8:40 am 11:05 am Feb 15 - Mar 1
545 8:40 am 11:05 am Feb 1 - Feb 1
528 6:30 pm 8:55 pm Jan 24 - Feb 28
Airports
Origin

Chicago
only $271
only $557
Destination

Ontario
$271