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Find Flight Deals from Ontario to Chicago O'Hare International (ONT - ORD)

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Ontario to Chicago O'Hare International

(Round-trip)
Depart: Wed Feb 18 2015 Return: Tue Feb 24 2015 Trip spans 7 days
US Airways
US Airways
ONT
7:40a
ORD
5:02p
9h 22m
1 stop
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
Depart: Sat Feb 14 2015 Return: Tue Feb 17 2015 Trip spans 4 days
US Airways
US Airways
ONT
1:30a
ORD
5:02p
15h 32m
1 stop
ORD
12:00a
ONT
8:34a
8h 34m
1 stop
Depart: Wed Feb 25 2015 Return: Sat Feb 28 2015 Trip spans 4 days
US Airways
US Airways
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
ORD
12:00a
ONT
8:34a
8h 34m
1 stop
Depart: Tue Mar 3 2015 Return: Tue Mar 10 2015 Trip spans 7 days
US Airways
US Airways
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
ORD
1:00a
ONT
4:05p
15h 05m
1 stop
Depart: Tue Feb 24 2015 Return: Sat Feb 28 2015 Trip spans 5 days
US Airways
US Airways
ONT
1:30a
ORD
7:46a
6h 16m
1 stop
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
Depart: Sat Feb 28 2015 Return: Tue Mar 3 2015 Trip spans 4 days
US Airways
US Airways
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
ORD
12:05p
ONT
6:11p
6h 06m
1 stop
Depart: Wed Mar 4 2015 Return: Thu Mar 5 2015 Trip spans 2 days
US Airways
US Airways
ONT
11:40a
ORD
5:02p
5h 22m
1 stop
ORD
12:00a
ONT
8:34a
8h 34m
1 stop
Depart: Thu Mar 19 2015 Return: Tue Mar 31 2015 Trip spans 13 days
US Airways
US Airways
ONT
5:56p
ORD
11:18p
5h 22m
1 stop
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
Depart: Thu Feb 26 2015 Return: Tue Mar 3 2015 Trip spans 6 days
US Airways
US Airways
ONT
4:56p
ORD
10:38p
5h 42m
1 stop
ORD
9:05a
ONT
3:05p
6h 00m
1 stop
Depart: Thu Feb 19 2015 Return: Mon Feb 23 2015 Trip spans 5 days
US Airways
US Airways
ONT
1:30a
ORD
5:02p
15h 32m
1 stop
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
Depart: Thu Mar 5 2015 Return: Mon Mar 9 2015 Trip spans 4 days
US Airways
US Airways
ONT
2:25p
ORD
10:18p
7h 53m
1 stop
ORD
1:00a
ONT
9:34a
8h 34m
1 stop
Depart: Tue Feb 10 2015 Return: Wed Feb 11 2015 Trip spans 2 days
US Airways
US Airways
ONT
7:40a
ORD
1:36p
5h 56m
1 stop
ORD
12:00a
ONT
6:06a
6h 06m
1 stop
Depart: Fri Feb 13 2015 Return: Tue Feb 17 2015 Trip spans 5 days
US Airways
US Airways
ONT
4:56p
ORD
10:38p
5h 42m
1 stop
ORD
12:00a
ONT
8:34a
8h 34m
1 stop
Depart: Thu Feb 12 2015 Return: Wed Feb 18 2015 Trip spans 7 days
US Airways
US Airways
ONT
2:25p
ORD
10:38p
8h 13m
1 stop
ORD
2:00a
ONT
8:34a
6h 34m
1 stop
Depart: Mon Mar 2 2015 Return: Wed Mar 4 2015 Trip spans 3 days
US Airways
US Airways
ONT
7:40a
ORD
1:41p
6h 01m
1 stop
ORD
12:00a
ONT
8:34a
8h 34m
1 stop
Depart: Fri Mar 6 2015 Return: Mon Mar 9 2015 Trip spans 3 days
US Airways
US Airways
ONT
7:40a
ORD
1:41p
6h 01m
1 stop
ORD
1:00a
ONT
9:34a
8h 34m
1 stop
Depart: Tue Feb 17 2015 Return: Sat Feb 21 2015 Trip spans 5 days
Multiple Airlines
Multiple Airlines
ONT
6:35a
ORD
3:43p
9h 08m
1 stop
ORD
2:00a
ONT
8:34a
6h 34m
1 stop
Depart: Wed Feb 11 2015 Return: Sat Feb 14 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
1:00a
ORD
9:44a
8h 44m
1 stop
ORD
8:28a
ONT
3:53p
7h 25m
1 stop
Depart: Tue Feb 3 2015 Return: Wed Feb 4 2015 Trip spans 2 days
United
United
ONT
9:51a
ORD
4:02p
6h 11m
1 stop
ORD
6:59a
ONT
4:30p
9h 31m
1 stop
Depart: Sat May 23 2015 Return: Wed May 27 2015 Trip spans 5 days
Delta
Delta
ONT
2:05a
ORD
10:32a
8h 27m
2 stops
ORD
8:00a
ONT
7:46p
11h 46m
2 stops
Change your search
Airports
Origin

Ontario
$267
Destination

Chicago
$267