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Find Deals on Flights 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: Sat Aug 29 2015 Return: Wed Sep 2 2015 Trip spans 5 days
United
United
ONT
4:46a
ORD
1:15p
8h 29m
1 stop
ORD
2:15p
ONT
10:29p
8h 14m
1 stop
Depart: Tue Sep 1 2015 Return: Wed Sep 9 2015 Trip spans 9 days
United
United
ONT
8:44a
ORD
3:36p
6h 52m
1 stop
ORD
2:13p
ONT
10:29p
8h 16m
1 stop
Depart: Tue Sep 8 2015 Return: Tue Sep 15 2015 Trip spans 8 days
United
United
ONT
1:05p
ORD
7:29p
6h 24m
1 stop
ORD
1:16a
ONT
8:44a
7h 28m
1 stop
Depart: Wed Sep 9 2015 Return: Wed Sep 16 2015 Trip spans 8 days
United
United
ONT
8:44a
ORD
4:45p
8h 01m
1 stop
ORD
6:47a
ONT
2:32p
7h 45m
1 stop
Depart: Tue Sep 15 2015 Return: Tue Sep 22 2015 Trip spans 8 days
United
United
ONT
5:07p
ORD
12:29a
7h 22m
1 stop
ORD
2:13p
ONT
10:29p
8h 16m
1 stop
Depart: Sat Sep 19 2015 Return: Tue Sep 22 2015 Trip spans 4 days
United
United
ONT
9:24a
ORD
4:47p
7h 23m
1 stop
ORD
6:47a
ONT
2:32p
7h 45m
1 stop
Depart: Wed Sep 23 2015 Return: Wed Sep 30 2015 Trip spans 8 days
United
United
ONT
1:00a
ORD
8:49a
7h 49m
1 stop
ORD
8:00a
ONT
4:30p
8h 30m
1 stop
Depart: Sat Sep 26 2015 Return: Wed Sep 30 2015 Trip spans 5 days
United
United
ONT
3:00p
ORD
11:00p
8h 00m
1 stop
ORD
2:00a
ONT
10:09a
8h 09m
1 stop
Depart: Tue Sep 29 2015 Return: Tue Oct 6 2015 Trip spans 8 days
United
United
ONT
3:00p
ORD
10:45p
7h 45m
1 stop
ORD
8:00a
ONT
4:30p
8h 30m
1 stop
Depart: Sat Oct 3 2015 Return: Wed Oct 7 2015 Trip spans 5 days
United
United
ONT
9:30a
ORD
4:29p
6h 59m
1 stop
ORD
1:35p
ONT
10:29p
8h 54m
1 stop
Depart: Wed Oct 7 2015 Return: Sat Oct 10 2015 Trip spans 4 days
United
United
ONT
4:57p
ORD
11:20p
6h 23m
1 stop
ORD
11:06a
ONT
6:27p
7h 21m
1 stop
Depart: Sat Oct 10 2015 Return: Tue Oct 13 2015 Trip spans 4 days
United
United
ONT
3:00p
ORD
12:37a
9h 37m
1 stop
ORD
11:06a
ONT
6:27p
7h 21m
1 stop
Depart: Sat Oct 17 2015 Return: Sat Oct 24 2015 Trip spans 8 days
United
United
ONT
3:00p
ORD
12:37a
9h 37m
1 stop
ORD
1:41p
ONT
10:29p
8h 48m
1 stop
Depart: Sat Oct 31 2015 Return: Tue Nov 3 2015 Trip spans 4 days
United
United
ONT
8:30a
ORD
2:46p
6h 16m
1 stop
ORD
2:10p
ONT
8:59p
6h 49m
1 stop
Depart: Sat Nov 14 2015 Return: Tue Nov 17 2015 Trip spans 4 days
United
United
ONT
12:20a
ORD
7:44a
7h 24m
1 stop
ORD
9:30a
ONT
5:15p
7h 45m
1 stop
Depart: Wed Nov 18 2015 Return: Tue Nov 24 2015 Trip spans 7 days
United
United
ONT
7:30a
ORD
1:46p
6h 16m
1 stop
ORD
1:30p
ONT
8:59p
7h 29m
1 stop
Depart: Mon Sep 14 2015 Return: Tue Sep 15 2015 Trip spans 2 days
United
United
ONT
5:07p
ORD
12:29a
7h 22m
1 stop
ORD
6:00a
ONT
3:27p
9h 27m
1 stop
Depart: Sat Aug 15 2015 Return: Wed Aug 19 2015 Trip spans 5 days
American Airlines
American Airlines
ONT
10:15a
ORD
6:31p
8h 16m
1 stop
ORD
1:10a
ONT
9:31a
8h 21m
1 stop
Depart: Tue Sep 22 2015 Return: Wed Sep 23 2015 Trip spans 2 days
US Airways
US Airways
ONT
8:35a
ORD
2:49p
6h 14m
1 stop
ORD
3:10a
ONT
9:33a
6h 23m
1 stop
Depart: Tue Aug 25 2015 Return: Mon Aug 31 2015 Trip spans 7 days
Delta
Delta
ONT
2:05a
ORD
9:29a
7h 24m
1 stop
ORD
2:37p
ONT
8:42p
6h 05m
1 stop
Airports
Origin

Ontario
$251
Destination

Chicago
$251