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Cheap flights from Ontario (ONT) to Illinois (IL)

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How to find the cheapest flight from
Ontario (ONT) to Illinois

How far in advance should I book a flight from Ontario to Illinois?

To save up to 10% on this flight, we recommend booking at least 37 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 $177 1-2 weeks out and tickets from $177 for flights departing within the next 72 hours.

Cheap flights from Ontario to Illinois in August, September 2020

The best prices found for ONT to Illinois flights for August, September
24 Jul - 27 Jul
$136pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
15 Aug - 22 Aug
$141pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
15 Aug - 22 Aug
$142pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario

Ontario to Illinois 2020 flight deals

Cheap flights to Illinois from Ontario found for this year
24 Jul - 27 Jul
$136pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
15 Aug - 22 Aug
$141pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
15 Aug - 22 Aug
$142pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario

Last minute flights from Ontario to Illinois

Late deals on round-trip flights to Illinois from Ontario, departing today and this week
24 Jul - 27 Jul
$136pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
24 Jul - 26 Jul
$152pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
23 Jul - 25 Jul
$155pp
ONT
Ontario
Multiple Airlines
   
2 STOPS
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
ONT
Ontario

One-way flights to Illinois from Ontario

The cheapest one-way flights from Ontario to Illinois
6:49 am - 3:20 pm
British Airways
1 Stop
6h 31m
ONT - ORD
British Airways
$136
Flighttix
6:20 pm - 7:30 am
JetBlue
1 Stop
11h 10m
ONT - ORD
JetBlue
2:00 am - 4:00 pm
Delta
2 Stops
12h 00m
ONT - BMI
Delta
$389
Delta

Related info for your journey

Useful info, stats and facts about Ontario to Illinois flights.

Flight FAQs

From Ontario to Illinois

Are flight prices decreasing from Ontario to Illinois due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Ontario and Illinois for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from Ontario to Illinois for under $200 on Cheapflights?

Yes, there are multiple flights from Ontario to Illinois for under $200. The cheapest flight booked recently is on Multiple Airlines for just $136, but on average you can expect to pay $159.

Are there nonstop flights from Ontario to Illinois for under $100 on Cheapflights?

There are no nonstop flights from Ontario to Illinois, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from Ontario to Illinois for under $200?

There are currently 20+ open flights from Ontario to Illinois within the next 7 days for less than $200.

What days are nonstop flights available from Ontario to Illinois?

Nonstop flights can be found on the following days: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday.

What are the most popular airlines that fly from Ontario to Illinois?

When booking a flight from Ontario to Illinois, you may want to consider flying on Major Airline, American Airlines or Alaska Airlines as they are the most popular for this route.

What are the most popular routes from Ontario to Illinois?

Most travelers choose Ontario - Chicago O'Hare Intl, Ontario - Chicago Midway or Ontario - Moline Quad-City when deciding on the best route from Ontario to Illinois.

What are the cheapest Flights from Ontario to Illinois?

Looking for the cheapest flight from Ontario to Illinois? While on average our users pay $237, our data indicates the cheapest price to be $129. The most popular route (Ontario - Chicago O'Hare Intl), is priced around $98.

How long does is the flight from Ontario to Illinois?

Airlines like Delta fly from Ontario to Illinois in about 7h 54m. The time it takes to get you to your destination can typically vary by up to .

What are the cheapest airlines to fly from Ontario to Illinois one-way?

To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $123. British Airways flights start at $136 while deals on JetBlue start at $231 one-way.

Arrival points for flights from Ontario to Illinois

Destination information for Illinois

Things to know before you go. Useful info for your trip from Ontario to Illinois

Airports servicing Ontario

Airports servicing

Bloomington (BMI)
Champaign (CMI)
Decatur (DEC)
Moline (MLI)
Marion (MWA)
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