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
Students
under 26
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: Wed Feb 8 2017 Return: Tue Feb 14 2017 Trip spans 7 days
United
United
ONT
12:38a
ORD
6:28a
5h 50m
1 stop
ORD
3:55a
ONT
9:44a
5h 49m
1 stop
Depart: Wed Jan 25 2017 Return: Sun Jan 29 2017 Trip spans 5 days
Major Airline
Major Airline
ONT
8:15a
ORD
6:45p
10h 30m
1 stop
ORD
7:45a
ONT
12:49a
17h 04m
1 stop
Depart: Tue Apr 4 2017 Return: Tue Apr 11 2017 Trip spans 8 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: Fri Jan 27 2017 Return: Tue Jan 31 2017 Trip spans 5 days
Delta
Delta
ONT
5:36a
ORD
11:09a
5h 33m
1 stop
ORD
1:45p
ONT
8:04p
6h 19m
1 stop
Depart: Thu Feb 9 2017 Return: Tue Feb 14 2017 Trip spans 6 days
United
United
ONT
12:38a
ORD
7:46a
7h 08m
1 stop
ORD
2:30a
ONT
9:44a
7h 14m
1 stop
Depart: Fri Jan 20 2017 Return: Mon Jan 23 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
1:15p
ORD
6:05a
16h 50m
1 stop
ORD
2:45p
ONT
2:24p
23h 39m
1 stop
Depart: Sat Feb 11 2017 Return: Tue Feb 14 2017 Trip spans 4 days
United
United
ONT
12:38a
ORD
6:26a
5h 48m
1 stop
ORD
2:30a
ONT
9:44a
7h 14m
1 stop
Depart: Tue Feb 14 2017 Return: Tue Feb 21 2017 Trip spans 8 days
United
United
ONT
12:38a
ORD
7:46a
7h 08m
1 stop
ORD
9:45a
ONT
5:40p
7h 55m
1 stop
Depart: Wed Apr 12 2017 Return: Sun Apr 16 2017 Trip spans 5 days
Major Airline
Major Airline
ONT
3:45a
ORD
1:47p
10h 02m
1 stop
ORD
10:00p
ONT
10:27a
12h 27m
1 stop
Depart: Thu Feb 16 2017 Return: Tue Feb 21 2017 Trip spans 6 days
Delta
Delta
ONT
1:00a
ORD
8:40a
7h 40m
1 stop
ORD
1:45p
ONT
8:10p
6h 25m
1 stop
Depart: Tue Apr 18 2017 Return: Tue Apr 25 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
8:45a
ORD
3:04p
6h 19m
1 stop
ORD
1:20p
ONT
7:45p
6h 25m
1 stop
Depart: Wed Feb 15 2017 Return: Tue Feb 21 2017 Trip spans 7 days
United
United
ONT
12:10p
ORD
9:39p
9h 29m
1 stop
ORD
9:45a
ONT
5:40p
7h 55m
1 stop
Depart: Thu Apr 27 2017 Return: Sat Apr 29 2017 Trip spans 3 days
American Airlines
American Airlines
ONT
8:45a
ORD
3:04p
6h 19m
1 stop
ORD
9:45a
ONT
4:17p
6h 32m
1 stop
Depart: Thu Feb 23 2017 Return: Tue Feb 28 2017 Trip spans 6 days
United
United
ONT
12:30a
ORD
7:52a
7h 22m
1 stop
ORD
9:45a
ONT
5:32p
7h 47m
1 stop
Depart: Mon Jan 23 2017 Return: Mon Jan 30 2017 Trip spans 8 days
Major Airline
Major Airline
ONT
12:00a
ORD
1:23a
1h 23m
nonstop
ORD
8:00a
ONT
1:23p
5h 23m
nonstop
Depart: Fri Apr 28 2017 Return: Tue May 2 2017 Trip spans 5 days
American Airlines
American Airlines
ONT
6:55a
ORD
3:41p
8h 46m
1 stop
ORD
1:00a
ONT
9:41a
8h 41m
1 stop
Depart: Tue Feb 28 2017 Return: Tue Mar 7 2017 Trip spans 8 days
Delta
Delta
ONT
1:00a
ORD
8:35a
7h 35m
1 stop
ORD
1:45p
ONT
8:10p
6h 25m
1 stop
Depart: Sat Feb 25 2017 Return: Tue Feb 28 2017 Trip spans 4 days
United
United
ONT
3:10p
ORD
9:39p
6h 29m
1 stop
ORD
2:00a
ONT
9:48a
7h 48m
1 stop
Depart: Thu May 4 2017 Return: Tue May 9 2017 Trip spans 6 days
American Airlines
American Airlines
ONT
8:59p
ORD
3:23a
6h 24m
1 stop
ORD
2:34p
ONT
9:08p
6h 34m
1 stop
Depart: Wed Mar 1 2017 Return: Tue Mar 7 2017 Trip spans 7 days
United
United
ONT
3:10p
ORD
10:15p
7h 05m
1 stop
ORD
11:00a
ONT
5:24p
6h 24m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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