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

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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Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Chicago to Ontario

(Round-trip)
Depart: Tue Mar 14 2017 Return: Tue Mar 21 2017 Trip spans 8 days
United
United
ORD
ONT
9h 46m
1 stop
ONT
ORD
7h 05m
1 stop
Depart: Wed Apr 26 2017 Return: Sat Apr 29 2017 Trip spans 4 days
American Airlines
American Airlines
ORD
ONT
6h 50m
1 stop
ONT
ORD
6h 32m
1 stop
Depart: Tue May 9 2017 Return: Thu May 11 2017 Trip spans 3 days
Major Airline
Major Airline
MDW
ONT
5h 24m
nonstop
ONT
MDW
1h 24m
nonstop
Depart: Mon Feb 27 2017 Return: Thu Mar 2 2017 Trip spans 4 days
Delta
Delta
ORD
ONT
6h 25m
1 stop
ONT
ORD
7h 35m
1 stop
Depart: Sat Apr 29 2017 Return: Tue May 2 2017 Trip spans 4 days
United
United
ORD
ONT
8h 03m
1 stop
ONT
ORD
6h 39m
1 stop
Depart: Wed May 3 2017 Return: Sat May 6 2017 Trip spans 4 days
American Airlines
American Airlines
ORD
ONT
6h 01m
1 stop
ONT
ORD
8h 05m
1 stop
Depart: Tue May 2 2017 Return: Sat May 6 2017 Trip spans 5 days
United
United
ORD
ONT
9h 52m
1 stop
ONT
ORD
7h 07m
1 stop
Depart: Fri Jun 9 2017 Return: Sat Jun 17 2017 Trip spans 9 days
Alaska Airlines
Alaska Airlines
ORD
ONT
12h 17m
1 stop
ONT
ORD
7h 55m
1 stop
Depart: Tue Apr 4 2017 Return: Tue Apr 11 2017 Trip spans 8 days
United
United
ORD
ONT
8h 03m
1 stop
ONT
ORD
6h 08m
1 stop
Depart: Sat May 6 2017 Return: Sat May 13 2017 Trip spans 8 days
United
United
ORD
ONT
9h 11m
1 stop
ONT
ORD
6h 07m
1 stop
Depart: Tue Aug 22 2017 Return: Tue Aug 29 2017 Trip spans 8 days
Delta
Delta
ORD
ONT
5h 54m
1 stop
ONT
ORD
10h 11m
2 stops
Depart: Fri Apr 14 2017 Return: Sun Apr 23 2017 Trip spans 10 days
Major Airline
Major Airline
MDW
ONT
5h 24m
1 stop
ONT
MDW
1h 24m
1 stop
Depart: Fri Apr 14 2017 Return: Wed Apr 19 2017 Trip spans 6 days
Delta
Delta
MDW
ONT
11h 58m
2 stops
ONT
MDW
10h 00m
2 stops
Depart: Thu Jun 1 2017 Return: Mon Jun 5 2017 Trip spans 5 days
American Airlines
American Airlines
ORD
ONT
6h 01m
1 stop
ONT
ORD
5h 29m
1 stop
Depart: Tue Mar 21 2017 Return: Tue Mar 28 2017 Trip spans 8 days
United
United
ORD
ONT
6h 12m
1 stop
ONT
ORD
8h 42m
1 stop
Depart: Tue Apr 4 2017 Return: Tue Apr 11 2017 Trip spans 8 days
Delta
Delta
MDW
ONT
11h 50m
2 stops
ONT
MDW
8h 11m
2 stops
Depart: Tue Jun 6 2017 Return: Sat Jun 10 2017 Trip spans 5 days
American Airlines
American Airlines
ORD
ONT
6h 49m
1 stop
ONT
ORD
5h 29m
1 stop
Depart: Sat Aug 19 2017 Return: Mon Aug 21 2017 Trip spans 3 days
Major Airline
Major Airline
MDW
ONT
5h 24m
nonstop
ONT
MDW
1h 24m
nonstop
Depart: Sat Apr 8 2017 Return: Sat Apr 15 2017 Trip spans 8 days
Delta
Delta
ORD
ONT
9h 12m
1 stop
ONT
ORD
12h 26m
2 stops
Depart: Fri Jun 16 2017 Return: Mon Jun 26 2017 Trip spans 11 days
American Airlines
American Airlines
ORD
ONT
6h 49m
1 stop
ONT
ORD
5h 29m
1 stop
Select an airline:  Southwest
Direct flights CHI to ONT on Southwest
Flight # Depart MDW Arrive ONT Sun Mon Tue Wed Thu Fri Sat Valid Between
4583 8:50 am 11:15 am Feb 18 - Mar 4
406 9:10 am 11:35 am Feb 16 - Mar 8
3768 9:25 am 11:45 am Feb 19 - Mar 5
1074 6:50 pm 9:05 pm Mar 11 - Mar 11
1074 6:50 pm 9:05 pm Mar 18 - Apr 22
1765 7:45 pm 10:00 pm Mar 9 - Mar 10
1765 7:45 pm 10:00 pm Mar 13 - Apr 24
3494 8:00 pm 10:20 pm Mar 12 - Apr 23
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.

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Airports
Origin

Chicago
only $206
only $333
Destination

Ontario
$206