To save up to 71% on this flight, we recommend booking at least 60 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Ontario to Illinois from $319 1-2 weeks out and tickets from $507 for flights departing within the next 72 hours.
Our data shows that January tends to be the cheapest month to fly to Illinois from Ontario. Users have commonly found prices around $313 for the month, but tickets can be as low as $135. Due to multiple factors, prepare for potentially higher prices in March.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Illinois as you normally would.
Fly from
Fly to
Budget
$136 - $315
Route
Depart
Return
Price
OntarioChicago Midway
ONT - MDW
ONTMDW
Ontario
Tue 9/17
1 stop9h 03m
Chicago Midway
Tue 9/24
1 stop22h 09m
OntarioChicago O'Hare Intl
ONT - ORD
ONTORD
Ontario
Mon 9/2
1 stop17h 32m
Chicago O'Hare Intl
Tue 9/10
1 stop24h 39m
OntarioChicago Midway
ONT - MDW
ONTMDW
Ontario
Wed 8/28
1 stop16h 03m
Chicago Midway
Wed 9/4
1 stop18h 02m
OntarioChicago O'Hare Intl
ONT - ORD
ONTORD
Ontario
Tue 8/27
1 stop22h 14m
Chicago O'Hare Intl
Wed 9/4
1 stop13h 38m
OntarioChicago Midway
ONT - MDW
ONTMDW
Ontario
Mon 6/10
1 stop14h 34m
Chicago Midway
Thu 6/13
1 stop20h 58m
OntarioChicago O'Hare Intl
ONT - ORD
ONTORD
Ontario
Tue 8/27
1 stop22h 14m
Chicago O'Hare Intl
Wed 9/4
1 stop15h 36m
OntarioChicago O'Hare Intl
ONT - ORD
ONTORD
Ontario
Fri 8/16
1 stop8h 13m
Chicago O'Hare Intl
Mon 8/19
2 stops10h 09m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Sat 9/7
1 stop9h 02m
Lambert-St Louis
Tue 9/10
2 stops8h 51m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Wed 6/12
1 stop11h 43m
Lambert-St Louis
Tue 7/16
2 stops15h 40m
No data available for this route at this time. Please check back soon.
Overall
Entertainment
Boarding
Food
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Comfort
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
12%of flight departures | Early morningMidnight to 6 am |
---|---|
88%of flight departures | Morning6 am to noon |
0%of flight departures | AfternoonNoon to 6 pm |
0%of flight departures | Evening6 pm to midnight |
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