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Find cheap flights from Ontario to Illinois from $116

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Illinois departing on 5/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
sex 6/7
sex 6/14

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Good to know

Low season

January

High season

August

Cheapest flight

$116
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly with an average 13% increase in price.
Flight from Toronto Pearson Airport to Chicago O'Hare Airport

FAQs for booking flights from Ontario to Illinois

  • How does KAYAK find such low prices on flights from Ontario to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Illinois from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Illinois with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Illinois from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 4 airlines serving from Ontario to Illinois

 
Need help choosing which airline to fly with from Ontario to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.2
Singapore AirlinesOverall score based on 1458 reviews
8.7Crew
8.4Boarding
7.8Food
8.2Entertainment
8.1Comfort
Airline reviews

My overall experience with Singapore Airlines is great. Will definitely fly Singapore airline again.

8.0 ExcellentAnonymous, Apr 2024SIN - JFK
Read more about Singapore Airlines reviews

My overall experience with Singapore Airlines is great. Will definitely fly Singapore airline again.

When boarding, after business class should be premium economy, but economy class already lined-up at the gate blocking premium economy to board. Singapore airline crew should done a better job to organize this chaos :( Thank you.

It seems paying premium economy does not make difference with economy. No priority boarding, not worthy paying extra$$$ for premium economy.

Wonderful service, planes and interior in great condition, very pleasant experience

They were able to assist my elderly father and myself after not being able to check in to scoot. The counter service was phenomenal. They did what they could to get us on the next plane so we could catch our Connecting flight. Scoot closed early on us so we ended up missing our flight.

They are great with every aspect of customer service. Helped my elderly father and aided him with using the restroom.

I did not like anything. Flight experience was bad overall.

Due to the delay of my first flight, my connecting flight with JetBlue was canceled by Singapore Airlines, but the JetBlue crew was very accommodating and rebooked a seat for me. The crew was very nice and had good attitude.

The overall operation needs to be improved. The in-flight services took forever and sometimes ran out of options.

Flight attendants seemed a little more stressed out than in past Singapore flights. Not sure if that was because we had a completely full flight or if it was because it was just before Christmas. Food was decent but someone needs to update their Indian Vegetarian menus to ensure more variety, less duplication of items (Parathas included in2 different formats) and less dairy.

Very comfortable Prem economy seats for a long haul flight. Had a problem with the tv that the crew fixed so was great!

The flight crew was exceptionally good. Personal needs were well met. The food choices were very nice.

we were upgraded which was a blessing and tender mercy for us. I fell the day before and was in extreme pain from knee to shoulder. Sitting in a more comfortable seat during the flight was an unexpected blessing and experience.

Not impressed with check in desk staff at Vancouver airport. Not a professional mind service and not cared or tried to help. Don’t think I would fly with them again

Seats were very comfortable. Crew were excellent. Food very good.

I felt thirsty and asked the flight attendent for water, but no one came for more than half an hour.

Everything went smooth. All flights were on time No changing gates, . No changing flights . It was like a completely different airlines tha n the last time I used Cathay Pacific . The last flight, 2 months ago, I had before this one was from Philippines also . I got changed in Manila and was told it only added 2 hours onto my flight . My 20 hour return trip ended up being 30 hours return with a 10.0 hour layover in New York with no seats anywhere . Everyone was sleeping or sitting on the floor . Unlike the hotel I was given in Manila to wait for this flight home . I never thought I would use Cathay Pacific again . But I did and this time you were great! I should have complained about the flight and layover from Hell a couple months ago. Consider that I am complaining about that august/23 flight now . Thank you got the great flying experience on my way home from philippines .

Average flight for which I paid too much for on a last minute purchase.

I traveled to Singapore for 5 days, I didn’t receive my luggage until the 3rd day. When I received my luggage was broken which they fixed it supposedly. I never had such a poor experience with the any other airline. I honestly think it should be a compensation for all of my losses and suffering that I went through.

i booked vegetarian hindu meal for my flights from delhi to hong kong, and hong kong to los angeles. on first flight, they said that they do no have my meal information. thank fuilly some veg meals were still left and i could eat. However, on second flight they game me hindu non vegetarian meal, and I ate shrimp without knowing. pathetic.

WiFi didn’t work on both sectors so made killing time harder - planes clean modern and good flight crew - would do again if WiFi works

6hrs fly they dont give you a glass of water from seoul to singapore need to buy drink and food plus they charge for bag on international fly is always Free 1 bag from seoul to singapore is Not a local fly you are traveling true asia same story from singapore to Bali no water drink after payment for bag drink cost more the regular airline Well never use this company again we use regular company like Delta korea japan China and even scoot parent company Singapore Air

We had 2 attempts to land at Singapore Changing during a thunderstorm. Everything was delayed by 1 hour plus.

Boarding was not accordingly after front seat, bmf then back seat. This delayed for at least 40mins or more. The staff at Jakarta can do better. Is chaos at the entry to board the plane. This tarnished Scoot reputation when everyone was talking about it.

The crew was not customer oriented at all, even confrontational . The aircraft needs more attention to detail as far as comfort, and the 1 hour sitting at the gate with no air is inexcusable

We flew on the 787 Dreamliner direct to main gate at KLIA2, quick entry via eGate and on the train 41mins after touchdown. Go well SCOOT

Was on scoot plus. The only good thing about the flight was the spacious seats. Tables and armrests were extremely dirty Food: bad Entertainment: non existent Wifi: unable to connect, then was painfully slow that we couldn’t even send messages Good thing we had a night flight, so we just slept throughout.

Not clear why boarding passes could only be issued at the counter and not through the kiosk. I had already check-in on the web, so waiting to obtain a boarding pass 1.5 hours before the actual flight defeats the purpose of early web check-in.

no charging point. food offering is limited and very much on the budget line. Overall is not satisfying for such a price and duration of flight.

We were delayed, but there was never any update given. Everyone was standing at the gate as boarding was supposed to commence at 13:10 for a 13:55 flight. We didn't actually start getting on the shuttles to the plane, until after 14:00. No updates, no information given at all.

Delay flight more than 8hours waiting and poor customer service!

Plane was extremely small so mind the size of your carry on

Other than lack of snacks, everything else went very well.

They don’t keep you updated on the flight status very well. It was late but nothing said

Pros: "Nothing!!! Horrible airline with horrible staff members."
Cons: "Everything. The staff and crew of Intercaribbean airlines are very unprofessional and not helpful at all. On top of the flight delays all the luggage for that particular flight was left in Kingston. Everybody was rather nonchalant and unapologetic about the situation. I was told I would get the the following day. The next day only two of my three bags showed up. I was not compensated for the inconvenience and was told point blank that they will only deliver one of my bags to my address even though they were the reason I had NONE of my luggage in the first place. They are disgusting!!! I would never recommend this airline to anyone."
Pros: "Nice people"
Cons: "A long walk to the D3 gate, but there were no amenities there I.e. snacks (to be fair a new terminal is under construction)"
Cons: "There was no air. I understand when you are on the ground it can be limited but even after getting to altitude there was no air conditioning."
Cons: "The flight was delayed for over three hours, apparently it is a regular occurence."
Pros: "almost nothing"
Cons: "The plane had a problem that forced us to turn around right after take off and as of this writing we still don’t know what’s going on or how long we are stuck here. Planes are old and apparently maintenance could be better."
Cons: "Was a bit difficult understanding the flight attendant, she had a thick Spanish accent"

Book cheap flights from Ontario to Illinois

Recent round-trip flight deals

6/4ter
1 stop
11h 05mYYZ-ORD
6/11ter
1 stop
18h 20mORD-YYZ
$215
6/5qua
1 stop
17h 23mYYZ-ORD
6/12qua
1 stop
18h 20mORD-YYZ
$216
6/1sáb
nonstopPorter Airlines
1h 47mYTZ-MDW
6/14sex
nonstopPorter Airlines
1h 42mMDW-YTZ
$217
6/4ter
nonstopPorter Airlines
1h 47mYTZ-MDW
6/8sáb
nonstopPorter Airlines
1h 42mMDW-YTZ
$218
6/5qua
nonstopAir Canada
2h 02mYYZ-ORD
6/12qua
nonstopAir Canada
1h 45mORD-YYZ
$242
5/31sex
nonstopAmerican Airlines
1h 56mYYZ-ORD
6/3seg
nonstopAmerican Airlines
1h 35mORD-YYZ
$251
5/31sex
1 stopUnited Airlines
12h 57mYYZ-ORD
6/1sáb
nonstopUnited Airlines
1h 43mORD-YYZ
$252
6/7sex
nonstopAmerican Airlines
1h 55mYYZ-ORD
6/11ter
1 stopAmerican Airlines
5h 29mORD-YYZ
$259
9/19qui
1 stopAir Canada
4h 22mYTZ-ORD
9/21sáb
1 stopAir Canada
5h 44mORD-YTZ
$261
6/1sáb
1 stopUnited Airlines
14h 18mYYZ-ORD
6/8sáb
nonstopUnited Airlines
1h 43mORD-YYZ
$272

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Recent one-way flight deals

5/14ter
1 stop
12h 10mYYZ-ORD
$116
5/14ter
1 stop
12h 10mYYZ-ORD
$117
6/1sáb
nonstopPorter Airlines
1h 47mYTZ-MDW
$129
5/21ter
nonstopPorter Airlines
1h 47mYTZ-MDW
$131
6/16dom
nonstopAir Canada
1h 54mYYZ-ORD
$143
5/21ter
nonstopAir Canada
1h 54mYYZ-ORD
$145
6/10seg
1 stopUnited Airlines
12h 57mYYZ-ORD
$161
6/7sex
1 stopAmerican Airlines
5h 35mYYZ-ORD
$168
7/9ter
1 stopAmerican Airlines
6h 54mYYZ-ORD
$169
9/9seg
nonstopUnited Airlines
1h 53mYYZ-ORD
$174

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Last minute flights from Ontario to Illinois

Last minute flight, train and bus deals

5/13seg
nonstopPorter Airlines
1h 47mYTZ-MDW
5/21ter
nonstopPorter Airlines
1h 42mMDW-YTZ
$299
5/13seg
multi-stop
34h 39mYYZ-ORD
5/21ter
multi-stop
25h 20mORD-YYZ
$323
5/13seg
nonstopAir Canada
1h 59mYYZ-ORD
5/16qui
nonstopAir Canada
1h 45mORD-YYZ
$374
5/13seg
nonstopAmerican Airlines
1h 55mYYZ-ORD
5/16qui
multi-stopAmerican Airlines
4h 50mORD-YYZ
$382
5/13seg
nonstopUnited Airlines
1h 54mYYZ-ORD
5/16qui
nonstopUnited Airlines
1h 48mORD-YYZ
$390
5/13seg
multi-stopAir Canada
5h 55mYTZ-ORD
5/21ter
multi-stopAir Canada
5h 46mORD-YTZ
$395
5/13seg
multi-stopDelta
3h 56mYYZ-ORD
5/18sáb
multi-stopDelta
8h 14mORD-YYZ
$395
5/13seg
multi-stopDelta
8h 21mYYZ-MDW
5/16qui
multi-stopDelta
8h 25mMDW-YYZ
$395
5/13seg
nonstopUnited Airlines
2h 04mYYZ-ORD
5/15qua
nonstopUnited Airlines
1h 48mORD-YYZ
$412
5/11sáb
nonstopAmerican Airlines
1h 55mYYZ-ORD
5/22qua
multi-stopAmerican Airlines
5h 04mORD-YYZ
$421

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