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

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Ontario to Chicago O'Hare International

(Round-trip)
Depart: Tue Mar 14 2017 Return: Mon Mar 20 2017 Trip spans 7 days
Major Airline
Major Airline
ONT
7:25a
ORD
8:29p
13h 04m
1 stop
ORD
10:00p
ONT
10:31a
12h 31m
1 stop
Depart: Wed Mar 22 2017 Return: Tue Mar 28 2017 Trip spans 7 days
United
United
ONT
1:35a
ORD
8:49a
7h 14m
1 stop
ORD
12:20p
ONT
10:06p
9h 46m
1 stop
Depart: Fri May 5 2017 Return: Tue May 9 2017 Trip spans 5 days
American Airlines
American Airlines
ONT
3:35p
ORD
12:06a
8h 31m
1 stop
ORD
1:00a
ONT
7:01a
6h 01m
1 stop
Depart: Tue Aug 29 2017 Return: Wed Sep 6 2017 Trip spans 9 days
Delta
Delta
ONT
6:20a
ORD
12:03p
5h 43m
1 stop
ORD
2:45p
ONT
8:44p
5h 59m
1 stop
Depart: Sat May 6 2017 Return: Tue May 9 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
10:30a
ORD
6:35p
8h 05m
1 stop
ORD
1:00a
ONT
7:01a
6h 01m
1 stop
Depart: Thu Mar 2 2017 Return: Tue Mar 14 2017 Trip spans 12 days
United
United
ONT
12:30a
ORD
9:04a
8h 34m
1 stop
ORD
12:20p
ONT
10:06p
9h 46m
1 stop
Depart: Tue May 9 2017 Return: Sat May 20 2017 Trip spans 12 days
American Airlines
American Airlines
ONT
3:35p
ORD
12:06a
8h 31m
1 stop
ORD
1:00a
ONT
7:01a
6h 01m
1 stop
Depart: Tue Jul 18 2017 Return: Sat Jul 22 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
ONT
1:15p
ORD
12:32a
11h 17m
1 stop
ORD
2:00a
ONT
8:18p
18h 18m
1 stop
Depart: Wed May 10 2017 Return: Sat May 20 2017 Trip spans 11 days
American Airlines
American Airlines
ONT
3:35p
ORD
12:06a
8h 31m
1 stop
ORD
1:00a
ONT
7:01a
6h 01m
1 stop
Depart: Tue May 16 2017 Return: Sat May 20 2017 Trip spans 5 days
American Airlines
American Airlines
ONT
3:35p
ORD
12:06a
8h 31m
1 stop
ORD
1:00a
ONT
9:41a
8h 41m
1 stop
Depart: Sat Mar 11 2017 Return: Mon Mar 13 2017 Trip spans 2 days
Delta
Delta
ONT
1:00a
ORD
6:54a
5h 54m
1 stop
ORD
2:44p
ONT
8:52p
6h 08m
1 stop
Depart: Mon Mar 13 2017 Return: Tue Mar 21 2017 Trip spans 9 days
United
United
ONT
8:30a
ORD
5:44p
9h 14m
1 stop
ORD
12:20p
ONT
10:06p
9h 46m
1 stop
Depart: Wed Mar 1 2017 Return: Mon Mar 6 2017 Trip spans 6 days
Major Airline
Major Airline
ONT
10:59a
ORD
4:44a
17h 45m
1 stop
ORD
9:45a
ONT
1:59a
16h 14m
1 stop
Depart: Wed Mar 15 2017 Return: Tue Mar 21 2017 Trip spans 7 days
United
United
ONT
8:30a
ORD
3:15p
6h 45m
1 stop
ORD
12:20p
ONT
10:06p
9h 46m
1 stop
Depart: Fri May 19 2017 Return: Wed May 24 2017 Trip spans 6 days
American Airlines
American Airlines
ONT
3:35p
ORD
12:06a
8h 31m
1 stop
ORD
1:00a
ONT
7:01a
6h 01m
1 stop
Depart: Tue Mar 21 2017 Return: Tue Mar 28 2017 Trip spans 8 days
United
United
ONT
8:30a
ORD
4:48p
8h 18m
1 stop
ORD
12:20p
ONT
10:06p
9h 46m
1 stop
Depart: Wed Aug 30 2017 Return: Wed Sep 6 2017 Trip spans 8 days
Delta
Delta
ONT
6:20a
ORD
12:03p
5h 43m
1 stop
ORD
2:45p
ONT
8:44p
5h 59m
1 stop
Depart: Tue Mar 7 2017 Return: Wed Mar 8 2017 Trip spans 2 days
American Airlines
American Airlines
ONT
2:35p
ORD
11:02p
8h 27m
1 stop
ORD
3:35a
ONT
10:36a
7h 01m
1 stop
Depart: Tue Mar 28 2017 Return: Tue Apr 4 2017 Trip spans 8 days
United
United
ONT
4:10p
ORD
11:15p
7h 05m
1 stop
ORD
12:14p
ONT
10:06p
9h 52m
1 stop
Depart: Tue Apr 4 2017 Return: Fri Apr 7 2017 Trip spans 4 days
Major Airline
Major Airline
ONT
10:20p
ORD
1:41p
15h 21m
1 stop
ORD
10:00p
ONT
4:21p
18h 21m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
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Airports
Origin

Ontario
$206
Destination

Chicago
$206