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.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

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: Tue May 17 2016 Return: Sat May 21 2016 Trip spans 5 days
United
United
ONT
1:00p
ORD
8:04p
7h 04m
1 stop
ORD
2:30a
ONT
9:21a
6h 51m
1 stop
Depart: Tue May 31 2016 Return: Sat Jun 4 2016 Trip spans 5 days
American Airlines
American Airlines
ONT
12:35p
ORD
6:22p
5h 47m
1 stop
ORD
1:00a
ONT
7:07a
6h 07m
1 stop
Depart: Wed Sep 7 2016 Return: Sun Sep 11 2016 Trip spans 5 days
Major Airline
Major Airline
ONT
3:05a
ORD
1:17p
10h 12m
1 stop
ORD
11:55a
ONT
4:12a
16h 17m
1 stop
Depart: Tue Sep 20 2016 Return: Mon Sep 26 2016 Trip spans 7 days
Delta
Delta
ONT
6:20a
ORD
11:55a
5h 35m
1 stop
ORD
2:30p
ONT
8:38p
6h 08m
1 stop
Depart: Mon May 16 2016 Return: Sat May 21 2016 Trip spans 6 days
United
United
ONT
4:46p
ORD
12:27a
7h 41m
1 stop
ORD
2:30a
ONT
9:21a
6h 51m
1 stop
Depart: Fri May 20 2016 Return: Sat May 21 2016 Trip spans 2 days
United
United
ONT
1:00p
ORD
7:44p
6h 44m
1 stop
ORD
2:30a
ONT
9:21a
6h 51m
1 stop
Depart: Sun Jun 12 2016 Return: Tue Jun 14 2016 Trip spans 3 days
Alaska Airlines
Alaska Airlines
ONT
2:00a
ORD
12:41a
22h 41m
1 stop
ORD
2:15a
ONT
9:07p
18h 52m
1 stop
Depart: Sat Aug 27 2016 Return: Fri Sep 2 2016 Trip spans 7 days
American Airlines
American Airlines
ONT
2:28a
ORD
8:20a
5h 52m
1 stop
ORD
1:00a
ONT
9:31a
8h 31m
1 stop
Depart: Tue Aug 23 2016 Return: Sat Aug 27 2016 Trip spans 5 days
Delta
Delta
ONT
6:20a
ORD
11:48a
5h 28m
1 stop
ORD
12:40p
ONT
7:08p
6h 28m
1 stop
Depart: Mon May 23 2016 Return: Wed May 25 2016 Trip spans 3 days
United
United
ONT
1:00p
ORD
8:06p
7h 06m
1 stop
ORD
2:00a
ONT
9:21a
7h 21m
1 stop
Depart: Wed Jun 29 2016 Return: Tue Jul 19 2016 Trip spans 21 days
Major Airline
Major Airline
ONT
4:40a
ORD
10:52a
6h 12m
1 stop
ORD
9:00p
ONT
3:07a
6h 07m
1 stop
Depart: Mon Aug 29 2016 Return: Sun Sep 4 2016 Trip spans 7 days
American Airlines
American Airlines
ONT
8:59p
ORD
3:23a
6h 24m
1 stop
ORD
1:00a
ONT
9:31a
8h 31m
1 stop
Depart: Tue Aug 30 2016 Return: Tue Sep 6 2016 Trip spans 8 days
Delta
Delta
ONT
2:00a
ORD
10:29a
8h 29m
2 stops
ORD
2:30p
ONT
8:38p
6h 08m
1 stop
Depart: Sat Sep 3 2016 Return: Wed Sep 7 2016 Trip spans 5 days
American Airlines
American Airlines
ONT
2:28a
ORD
8:20a
5h 52m
1 stop
ORD
1:00a
ONT
7:03a
6h 03m
1 stop
Depart: Fri Jun 17 2016 Return: Sat Jun 25 2016 Trip spans 9 days
Major Airline
Major Airline
ONT
11:30a
ORD
7:53p
8h 23m
1 stop
ORD
12:15p
ONT
5:58p
5h 43m
1 stop
Depart: Fri May 6 2016 Return: Tue May 10 2016 Trip spans 5 days
United
United
ONT
3:00a
ORD
10:56a
7h 56m
1 stop
ORD
2:00a
ONT
9:21a
7h 21m
1 stop
Depart: Tue Sep 6 2016 Return: Sun Sep 11 2016 Trip spans 6 days
American Airlines
American Airlines
ONT
8:59p
ORD
3:23a
6h 24m
1 stop
ORD
1:00a
ONT
9:31a
8h 31m
1 stop
Depart: Thu Sep 1 2016 Return: Tue Sep 6 2016 Trip spans 6 days
Delta
Delta
ONT
6:20a
ORD
11:55a
5h 35m
1 stop
ORD
2:30p
ONT
8:38p
6h 08m
1 stop
Depart: Sat May 7 2016 Return: Tue May 10 2016 Trip spans 4 days
United
United
ONT
8:00a
ORD
4:19p
8h 19m
1 stop
ORD
2:40a
ONT
9:21a
6h 41m
1 stop
Depart: Wed Aug 31 2016 Return: Sun Sep 4 2016 Trip spans 5 days
Major Airline
Major Airline
ONT
10:00p
ORD
9:32a
11h 32m
1 stop
ORD
6:45a
ONT
2:00p
7h 15m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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

Here's why:

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

We aggregate tons of data for you
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 don'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.

More questions or if you have a bad price to report to us
Please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Ontario
$184
Destination

Chicago
$184