$114 Find Cheap Flights from Ontario to Illinois

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 2/12. 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.
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Good to know

Low season

January

High season

August

Cheapest flight

$114
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 6% 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.

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Flights from Ontario to Illinois: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Ontario to Illinois 
BrianFlew with Air CanadaYYZ-ORDOct 2024
Be prepared for a labyrinthine experience traversing the various levels and passages of the Toronto airport. Bring quality walking shoes, as it is likely well over a km in total walking time.
Jo AnnFlew with Air CanadaYYZ-ORDJun 2024
It seemed that anyone who checked a bag was able to retrieve it quickly.
Verified travelerFlew with United AirlinesYYZ-ORDMar 2024
Carry-on baggage sizing for United US bound flights appears to be much smaller than for Canadian flights, which forced me to check my bag at the last minute. So check online ahead of time
Verified travelerFlew with Air CanadaYYZ-ORDFeb 2024
I would definitely choose Air Canada over dirty old United airplanes any day.
Verified travelerFlew with United AirlinesYYZ-ORDDec 2023
The departure time was very convenient with the United.

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.
8.9
Cape AirOverall score based on 39 reviews
8.6Boarding
8.9Entertainment
9.2Crew
8.6Food
8.5Comfort
Airline reviews

It’s less complicated from Culebra to SJU airport. Next time I will prefer to leave from Isla Grande airport to Culebra !!

10.0 ExcellentSonia, Apr 2023CPX - SJU
Read more Cape Air reviews

It’s less complicated from Culebra to SJU airport. Next time I will prefer to leave from Isla Grande airport to Culebra !!

10 seat Cesna. Equal parts transportation and adventure. 20 minute hop at 10000 feet and 160 mph, sitting 10 feet from the pilot. Panoramic views of the island. Very simple boarding, very low stress. VQS airport tiny, undeveloped. Highly recommended flight, Cape Air doing a great job here.

We traveled in a small Cesna so there was no food or entertainment. The pilot was excellent enjoy being able to see the places we were flying above. It was an OK flight.

Very smooth flight and landing. Pilot delivered his safety instruction in such a monotone that it wasn’t easily understandable. Words were said but he didn't communicate to us. If he was communicating to someone he cared about, he would have used inflection and other nuances of speaking. Virtually all emphasis was removed so it was just blah blah blah (really fast, like the end of a Pharma commercial)

My pilot on Cape Air was AMAZING!!!! I hoping that next time I fly I have him as my pilot. He made me feel safe and secure in his skills.

I so appreciate this service into and out of Glendive. Always a good experience with crew and support team.

It was not what I had expected but it was a great way to see the landscape.

Pros: "ground crew, pilot, flight was smooth and gate connections to Jet Blue in Boston were fantastic!"
Cons: "leg room"
Pros: "The pilot was kind and to the point."
Cons: "The guy who boarded us told me to wait as his computer could not check me in. 10min later he is rushing me to get on the runway. It was 30min before scheduled take off. I had ordered food and had to cancel my order before the café had finished, so he wasted food and did not get paid and I was hurried and boarded the plane hungry. I probably won't use Cape Air again unless it's an emergency situation"
Cons: "Boarded half hour late. No explanation. Pretty standard on Cape Air these days"

Everything was good except food , food choices was very less. Washrooms were closed.overall good experience.

This flight was 16 hours and they made it very tolerable. Seats were comfortable and the staff very accommodating. I had plenty of inflight entertainment. Food was very good.

They made 22 hours aboard aircraft very enjoyable. I was very impressed with the attention to detail and level of service. Singapore airline will be my preferred choice going forward.

Service excellent would chose Singapore airlines as my first choice

The staff were amazing and very kind. The seats recline a little too far back and are up close when sitting behind.

My groups frequent flyer star allianceUnited airline miles was not accepted. The Singapore premium economy bag had to be requested, it was very lacking- no toothbrush. I paid more than double than economy but could only use the bathrooms sharing with economy which was hardly available and had to wait in line. Is the 2X $ worth it just for a larger seat???? It is questionable. Seats were not that comfortable. My husband’s seat had white stains on it- had to wipe it down. Our headphones did not have covers on it. Food- way too much.

Excellent- a lot of food Disappointed with the premium economy pouch- did not have toothbrush and tooth paste or socks. Other airlines provide them

A 16 hour flight from Singapore to Los Angeles had only 2 meals. Please make it 3 meals.

Overall good experience, convenient Changi Airport, even the layover was long.

Singapore Airlines from Mumbai was late, we were rerouted to Copenhagen and then to Los Angeles. As senior citizens, we should have been given a hotel voucher for a night and fly out the next day. I hope Singapore Airlines should give us a credit in good faith if they want us to fly with them. I doubt it, but you never know.

Food was hood for airline food with good poftion and variety in meals. Frequency of beverage service was very low and amount of soda with meals was inadequate.

bad… no veg food was provided eventhough i pre ordered special meal

Excellent service provided the flight crew. Food and drinks were very good.

Cathay has a great reputation, though it's baseline economy seating is nothing to write home about (and SE Asia flight passengers sometime lack 'routine stateside' etiquette). On the other hand, food was great, flight attendants were nice, and price was very good~

Not enough food for everyone. . Always run out of food when we ask

The crews were smiling all the time with soft tunes when they spoke; the food was excellent. Thank you!

They charged me $900 to board my flight I already paid for just because I missed my previous flight. I do not recommend this airline by any means.

Not good. Small seats. Not enough food that customers wanted. No special requests were given that i could see. Slow response from flight attendants

For a transpacific flight, flying economy is awful! The seats are cramped and its meant for petite folks! Good luck if you have long legs. BOARDING - AWFUL, we got to Hong Kong - the gate was listed, but upon arrival, there was a MESS of boarding procedures, they basically DIY'ed how to board but making three lines and putting three ground crew to check for passports in the terminal area. THEN to make it worse, after going through that cattle process, all of a sudden you see people standing and looking confused, apparently we were told to get in line to board, but the AV notification wasnt even working. So people started cramming in line - worse than cattle. One saving point, the flight crew forgot to serve me dinner and after waiting for it, I fell asleep since this was a midnight flight. After letting a crew know that I was forgotten, all of my meals were served first !!! Yay for being in the economy seats! Nothing much to write home about once more!

The crew is amazing, very attentive. They went above and beyond when we had a small spill. the food on this trip was not nearly as good as other Cathay flights. The economy seats are very comfortable, but when the person in front of yo reclines, you need to recline to see your screen or be comfortable.

Not a frequent user of their website booking. Booked my check-in baggage and only realized that I did not book my check in baggage for return flight. The receipt was not clear in identifying that as well. Was charged exorbitantly at check in counter. Bad taste for sure when it is a business trip and not leisure trip. Baggage was delayed for more than an hour at belt back in SG.

Boarding took forever. It's also weird that we paid more (for preferred seats) to get on the plane last. Inflight WiFi never worked the entire trip. I want my money back.

The cosmetic condition was pretty run down. The carpets were badly worn out. Even the paint on the wings was chipped and peeled! Looks like they are running these 787s to the ground..

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.

Book cheap flights from Ontario to Illinois

Recent round-trip flight deals

1/10Fri
nonstopAir Canada
1h 51mYYZ-ORD
1/13Mon
nonstopAir Canada
1h 41mORD-YYZ
$178
12/12Thu
nonstopPorter Airlines
1h 50mYTZ-MDW
12/15Sun
nonstopPorter Airlines
1h 42mMDW-YTZ
$219
12/12Thu
nonstopUnited Airlines
1h 51mYYZ-ORD
12/15Sun
nonstopUnited Airlines
1h 39mORD-YYZ
$245
12/12Thu
nonstopAir Transat
1h 50mYTZ-MDW
12/15Sun
nonstopAir Transat
1h 42mMDW-YTZ
$255
12/13Fri
1 stop
5h 31mYYZ-ORD
12/17Tue
nonstop
1h 47mORD-YYZ
$259
12/12Thu
1 stopUnited Airlines
9h 35mYYZ-ORD
12/15Sun
nonstopUnited Airlines
1h 39mORD-YYZ
$260
12/12Thu
nonstopAir Transat
1h 50mYTZ-MDW
12/15Sun
nonstopAir Transat
1h 42mMDW-YTZ
$261
12/13Fri
nonstop
2h 07mYYZ-ORD
12/17Tue
nonstop
1h 41mORD-YYZ
$262
12/12Thu
nonstopLufthansa
2h 13mYYZ-ORD
12/15Sun
nonstopLufthansa
1h 39mORD-YYZ
$266
12/12Thu
nonstopLufthansa
2h 13mYYZ-ORD
12/15Sun
nonstopLufthansa
1h 39mORD-YYZ
$267

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Recent one-way flight deals

2/12Wed
nonstopAir Canada
1h 51mYYZ-ORD
$114
12/14Sat
nonstopPorter Airlines
1h 50mYTZ-MDW
$133
12/17Tue
nonstopUnited Airlines
1h 57mYYZ-ORD
$147
12/18Wed
1 stopUnited Airlines
7h 16mYYZ-ORD
$152
12/14Sat
1 stopDelta
8h 30mYYZ-ORD
$165
12/16Mon
1 stopDelta
5h 31mYYZ-MDW
$165
12/10Tue
1 stopAmerican Airlines
5h 50mYUL-ORD
$167
2/4Tue
1 stop
10h 30mYYZ-ORD
$168
12/11Wed
1 stop
9h 04mYTZ-ORD
$168
12/5Thu
nonstopAmerican Airlines
2h 15mYYZ-ORD
$177

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Last minute flights from Ontario to Illinois

Last minute flight, train and bus deals

11/25Mon
nonstopPorter Airlines
1h 50mYTZ-MDW
12/9Mon
nonstopPorter Airlines
1h 42mMDW-YTZ
$375
11/26Tue
multi-stop
23h 36mYUL-ORD
12/3Tue
multi-stop
27h 59mORD-YUL
$376
11/26Tue
nonstopAir Transat
1h 50mYTZ-MDW
1/16Thu
nonstopAir Transat
1h 42mMDW-YTZ
$379
11/25Mon
nonstopAmerican Airlines
2h 00mYYZ-ORD
12/9Mon
multi-stopAmerican Airlines
4h 50mORD-YYZ
$401
11/26Tue
nonstopAmerican Airlines
2h 00mYYZ-ORD
12/4Wed
multi-stopAmerican Airlines
4h 58mORD-YYZ
$405
11/26Tue
multi-stopWestJet
4h 37mYYZ-MDW
12/3Tue
multi-stopWestJet
13h 11mMDW-YYZ
$405
11/24Sun
multi-stopWestJet
13h 32mYUL-MDW
11/27Wed
multi-stopWestJet
8h 16mMDW-YUL
$406
11/26Tue
nonstopAir Transat
1h 50mYTZ-MDW
12/4Wed
nonstopAir Transat
1h 42mMDW-YTZ
$412
11/23Sat
nonstopUnited Airlines
1h 57mYYZ-ORD
12/1Sun
nonstopUnited Airlines
1h 39mORD-YYZ
$473
11/22Fri
nonstopUnited Airlines
2h 07mYYZ-ORD
11/25Mon
nonstopUnited Airlines
1h 45mORD-YYZ
$504

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Everything you need to know for your flight to Illinois

Cabin class types available on flights to Ontario

Cabin classes available on flights to Ontario. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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