Find Cheap 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.
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Book cheap flights from Ontario to Chicago

(Round-trip)
Depart: Sat Sep 2 2017 Return: Wed Sep 6 2017 Trip spans 5 days
United
United
ONT
ORD
6h 21m
1 stop
ORD
ONT
8h 49m
1 stop
Depart: Fri Sep 22 2017 Return: Tue Sep 26 2017 Trip spans 5 days
Multiple Airlines
Multiple Airlines
ONT
ORD
6h 15m
1 stop
ORD
ONT
7h 06m
1 stop
Depart: Mon Aug 7 2017 Return: Wed Aug 9 2017 Trip spans 3 days
American Airlines
American Airlines
ONT
ORD
3h 57m
nonstop
ORD
ONT
4h 17m
nonstop
Depart: Tue Oct 3 2017 Return: Tue Oct 10 2017 Trip spans 8 days
Delta
Delta
ONT
ORD
5h 43m
1 stop
ORD
ONT
5h 59m
1 stop
Depart: Thu Oct 19 2017 Return: Sun Oct 22 2017 Trip spans 4 days
Frontier
Frontier
ONT
ORD
21h 16m
1 stop
ORD
ONT
13h 44m
1 stop
Depart: Wed Oct 11 2017 Return: Tue Oct 17 2017 Trip spans 7 days
United
United
ONT
ORD
8h 25m
1 stop
ORD
ONT
8h 51m
1 stop
Depart: Sat Dec 2 2017 Return: Mon Dec 4 2017 Trip spans 3 days
United
United
ONT
ORD
7h 20m
1 stop
ORD
ONT
8h 15m
1 stop
Depart: Wed Aug 16 2017 Return: Sat Aug 19 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
ORD
3h 57m
nonstop
ORD
ONT
4h 17m
nonstop
Depart: Sun Oct 29 2017 Return: Wed Nov 1 2017 Trip spans 4 days
United
United
ONT
ORD
6h 20m
1 stop
ORD
ONT
7h 15m
1 stop
Depart: Mon Aug 21 2017 Return: Mon Aug 28 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
ORD
3h 57m
nonstop
ORD
ONT
8h 28m
1 stop
Depart: Sat Aug 5 2017 Return: Tue Aug 8 2017 Trip spans 4 days
Delta
Delta
ONT
MDW
8h 43m
2 stops
MDW
ONT
10h 02m
2 stops
Depart: Mon Dec 11 2017 Return: Thu Dec 14 2017 Trip spans 4 days
United
United
ONT
ORD
8h 24m
1 stop
ORD
ONT
8h 15m
1 stop
Depart: Tue Oct 3 2017 Return: Tue Oct 17 2017 Trip spans 15 days
Delta
Delta
ONT
MDW
8h 49m
2 stops
MDW
ONT
11h 34m
2 stops
Depart: Thu Sep 14 2017 Return: Sun Sep 17 2017 Trip spans 4 days
United
United
ONT
ORD
6h 51m
1 stop
ORD
ONT
11h 24m
1 stop
Depart: Wed Sep 13 2017 Return: Tue Sep 19 2017 Trip spans 7 days
Delta
Delta
ONT
MDW
10h 34m
2 stops
MDW
ONT
12h 42m
2 stops
Depart: Sat Jul 29 2017 Return: Mon Jul 31 2017 Trip spans 3 days
American Airlines
American Airlines
ONT
ORD
3h 57m
nonstop
ORD
ONT
4h 17m
nonstop
Depart: Fri Jul 28 2017 Return: Tue Aug 8 2017 Trip spans 12 days
Delta
Delta
ONT
MDW
11h 12m
2 stops
MDW
ONT
10h 02m
2 stops
Depart: Fri Jul 28 2017 Return: Fri Aug 4 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
ORD
3h 57m
nonstop
ORD
ONT
4h 17m
nonstop
Depart: Mon Jul 31 2017 Return: Mon Aug 7 2017 Trip spans 8 days
United
United
ONT
ORD
7h 36m
1 stop
ORD
ONT
7h 44m
1 stop
Depart: Sat Aug 12 2017 Return: Wed Aug 16 2017 Trip spans 5 days
Delta
Delta
ONT
MDW
12h 45m
2 stops
MDW
ONT
12h 13m
2 stops
Direct flights ONT to CHI on American Airlines
Flight # Depart ONT Arrive ORD Sun Mon Tue Wed Thu Fri Sat Valid Between
2744 11:59 pm 5:56 am Jul 26 - Aug 21
* 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

Ontario
$226
Destination

Chicago
only $226
only $344