Find Cheap Flights to Ontario

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 Chicago to Ontario

(Round-trip)
Depart: Fri Sep 22 2017 Return: Mon Sep 25 2017 Trip spans 4 days
United
United
ORD
ONT
7h 06m
1 stop
ONT
ORD
6h 20m
1 stop
Depart: Tue Oct 17 2017 Return: Sat Oct 21 2017 Trip spans 5 days
Frontier
Frontier
ORD
ONT
13h 44m
1 stop
ONT
ORD
21h 34m
1 stop
Depart: Sat Feb 3 2018 Return: Tue Feb 6 2018 Trip spans 4 days
American Airlines
American Airlines
ORD
ONT
8h 39m
1 stop
ONT
ORD
8h 40m
1 stop
Depart: Tue Oct 3 2017 Return: Tue Nov 14 2017 Trip spans 43 days
Delta
Delta
MDW
ONT
9h 47m
2 stops
ONT
MDW
8h 49m
2 stops
Depart: Wed Oct 4 2017 Return: Mon Oct 9 2017 Trip spans 6 days
United
United
ORD
ONT
7h 50m
1 stop
ONT
ORD
6h 51m
1 stop
Depart: Sat Oct 7 2017 Return: Tue Oct 10 2017 Trip spans 4 days
United
United
ORD
ONT
8h 06m
1 stop
ONT
ORD
6h 20m
1 stop
Depart: Wed Nov 1 2017 Return: Sat Nov 4 2017 Trip spans 4 days
United
United
ORD
ONT
5h 55m
1 stop
ONT
ORD
6h 23m
1 stop
Depart: Thu Dec 7 2017 Return: Mon Dec 11 2017 Trip spans 5 days
United
United
ORD
ONT
8h 19m
1 stop
ONT
ORD
6h 43m
1 stop
Depart: Sat Jan 27 2018 Return: Sun Feb 4 2018 Trip spans 9 days
United
United
ORD
ONT
7h 08m
1 stop
ONT
ORD
6h 20m
1 stop
Depart: Sat Feb 10 2018 Return: Wed Feb 14 2018 Trip spans 5 days
United
United
ORD
ONT
7h 22m
1 stop
ONT
ORD
7h 20m
1 stop
Depart: Wed Aug 23 2017 Return: Fri Aug 25 2017 Trip spans 3 days
Delta
Delta
MDW
ONT
12h 13m
2 stops
ONT
MDW
13h 12m
2 stops
Depart: Sat Oct 14 2017 Return: Tue Oct 17 2017 Trip spans 4 days
United
United
ORD
ONT
7h 05m
1 stop
ONT
ORD
5h 52m
1 stop
Depart: Tue Jan 16 2018 Return: Sat Jan 20 2018 Trip spans 5 days
United
United
ORD
ONT
7h 15m
1 stop
ONT
ORD
6h 06m
1 stop
Depart: Thu Sep 7 2017 Return: Wed Sep 20 2017 Trip spans 14 days
Delta
Delta
MDW
ONT
11h 04m
2 stops
ONT
MDW
10h 05m
2 stops
Depart: Mon Aug 28 2017 Return: Tue Sep 5 2017 Trip spans 9 days
United
United
ORD
ONT
7h 42m
1 stop
ONT
ORD
7h 29m
1 stop
Depart: Wed Sep 20 2017 Return: Tue Oct 3 2017 Trip spans 14 days
Delta
Delta
MDW
ONT
12h 42m
2 stops
ONT
MDW
8h 38m
2 stops
Depart: Fri Nov 3 2017 Return: Sun Nov 5 2017 Trip spans 3 days
United
United
ORD
ONT
8h 20m
1 stop
ONT
ORD
7h 30m
1 stop
Depart: Sat Oct 21 2017 Return: Sat Oct 28 2017 Trip spans 8 days
Delta
Delta
MDW
ONT
10h 32m
2 stops
ONT
MDW
8h 36m
2 stops
Depart: Fri Jan 5 2018 Return: Wed Jan 10 2018 Trip spans 6 days
United
United
ORD
ONT
7h 08m
1 stop
ONT
ORD
6h 06m
1 stop
Depart: Mon Jan 29 2018 Return: Mon Feb 5 2018 Trip spans 8 days
Delta
Delta
MDW
ONT
7h 36m
2 stops
ONT
MDW
9h 48m
2 stops
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
3819 3:40 pm 5:45 pm Sep 3 - Sep 3
3178 6:40 pm 8:50 pm Sep 2 - Sep 2
49 6:40 pm 8:50 pm Sep 9 - Sep 23
4156 7:10 pm 9:15 pm Sep 10 - Sep 24
983 7:45 pm 9:55 pm Aug 21 - Sep 29
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Airports
Origin

Chicago
only $214
only $344
Destination

Ontario
$214