Find Deals on Flights from Ontario to Chicago (ONT - CHI)

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

(Round-trip)
Depart: Wed Apr 12 2017 Return: Mon Apr 17 2017 Trip spans 6 days
Major Airline
Major Airline
ONT
ORD
15h 58m
1 stop
ORD
ONT
12h 27m
1 stop
Depart: Wed Apr 19 2017 Return: Sat Apr 22 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
ORD
6h 19m
1 stop
ORD
ONT
6h 41m
1 stop
Depart: Mon Jun 5 2017 Return: Sat Jun 10 2017 Trip spans 6 days
United
United
ONT
ORD
7h 23m
1 stop
ORD
ONT
7h 49m
1 stop
Depart: Wed May 10 2017 Return: Sat May 13 2017 Trip spans 4 days
Southwest
Southwest
ONT
MDW
3h 50m
nonstop
MDW
ONT
4h 15m
nonstop
Depart: Wed Apr 12 2017 Return: Tue Apr 18 2017 Trip spans 7 days
Delta
Delta
ONT
MDW
10h 00m
2 stops
MDW
ONT
11h 50m
2 stops
Depart: Tue Sep 12 2017 Return: Tue Sep 19 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
ORD
5h 29m
1 stop
ORD
ONT
6h 36m
1 stop
Depart: Wed Apr 26 2017 Return: Sun Apr 30 2017 Trip spans 5 days
United
United
ONT
ORD
7h 08m
1 stop
ORD
ONT
7h 36m
1 stop
Depart: Tue Jul 18 2017 Return: Sat Jul 29 2017 Trip spans 12 days
American Airlines
American Airlines
ONT
ORD
3h 55m
nonstop
ORD
ONT
4h 07m
nonstop
Depart: Wed May 3 2017 Return: Mon May 8 2017 Trip spans 6 days
Major Airline
Major Airline
ONT
MDW
1h 24m
1 stop
MDW
ONT
5h 24m
1 stop
Depart: Tue May 2 2017 Return: Sat May 6 2017 Trip spans 5 days
United
United
ONT
ORD
6h 09m
1 stop
ORD
ONT
7h 12m
1 stop
Depart: Mon Jul 24 2017 Return: Sat Jul 29 2017 Trip spans 6 days
American Airlines
American Airlines
ONT
ORD
3h 55m
nonstop
ORD
ONT
4h 07m
nonstop
Depart: Tue Aug 1 2017 Return: Mon Aug 14 2017 Trip spans 14 days
American Airlines
American Airlines
ONT
ORD
3h 55m
nonstop
ORD
ONT
4h 07m
nonstop
Depart: Sat Jun 24 2017 Return: Sat Jul 8 2017 Trip spans 15 days
United
United
ONT
ORD
9h 14m
1 stop
ORD
ONT
7h 13m
1 stop
Depart: Thu Aug 10 2017 Return: Tue Aug 15 2017 Trip spans 6 days
American Airlines
American Airlines
ONT
ORD
3h 55m
nonstop
ORD
ONT
4h 07m
nonstop
Depart: Mon Jul 3 2017 Return: Sun Aug 6 2017 Trip spans 35 days
Major Airline
Major Airline
ONT
MDW
1h 24m
1 stop
MDW
ONT
5h 24m
1 stop
Depart: Fri Aug 4 2017 Return: Tue Aug 15 2017 Trip spans 12 days
American Airlines
American Airlines
ONT
ORD
3h 55m
nonstop
ORD
ONT
4h 07m
nonstop
Depart: Fri Jun 9 2017 Return: Tue Jun 13 2017 Trip spans 5 days
Major Airline
Major Airline
ONT
ORD
16h 47m
1 stop
ORD
ONT
18h 16m
1 stop
Depart: Thu Jul 6 2017 Return: Sat Jul 8 2017 Trip spans 3 days
United
United
ONT
ORD
6h 34m
1 stop
ORD
ONT
7h 13m
1 stop
Depart: Thu Sep 14 2017 Return: Sun Sep 17 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
ORD
6h 24m
1 stop
ORD
ONT
6h 27m
1 stop
Depart: Wed Aug 2 2017 Return: Tue Aug 8 2017 Trip spans 7 days
Delta
Delta
ONT
MDW
10h 08m
2 stops
MDW
ONT
10h 59m
2 stops
Select an airline:  Southwest
Direct flights ONT to CHI on Southwest
Flight # Depart ONT Arrive MDW Sun Mon Tue Wed Thu Fri Sat Valid Between
4847 6:05 am 11:55 am Apr 29 - Apr 29
2279 6:45 am 12:40 pm Apr 1 - Apr 22
4929 2:40 pm 8:25 pm Mar 27 - Apr 24
413 2:55 pm 8:45 pm Apr 25 - May 26
5299 3:15 pm 9:05 pm Apr 30 - May 7
4739 3:20 pm 9:10 pm Apr 2 - Apr 23
* 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.

We compile tonnes 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 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,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Ontario
$214
Destination

Chicago
only $214
only $271