C$ 159 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 12/2. 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

Search hundreds of travel sites at once for deals on flights to Illinois

In the last 7 days, travellers have searched 46,646,933 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Good to know

Low season

January

High season

August

Cheapest flight

C$ 159
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly (6% more expensive on average)
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

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

Insights shared by verified travellers 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.
8.1
Singapore AirlinesOverall score based on 1338 reviews
7.7Food
8.0Entertainment
8.3Boarding
8.0Comfort
8.6Crew
Airline reviews

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

8.0 ExcellentAnonymous, Nov 2024SIN - SFO
Read more Singapore Airlines reviews

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.

Did not get to travel, you canceled my flight and left me stranded for the hole day, it's another day and I can't get to my destination. I will not recommend any one to this away, bad service

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."

Book cheap flights from Ontario to Illinois

Recent round-trip flight deals

10/1Fri
directAir Canada
1h 51mYYZ-ORD
13/1Mon
directAir Canada
1h 41mORD-YYZ
C$ 249
12/12Thu
directPorter Airlines
1h 50mYTZ-MDW
15/12Sun
directPorter Airlines
1h 42mMDW-YTZ
C$ 306
12/12Thu
directUnited Airlines
1h 51mYYZ-ORD
16/12Mon
directUnited Airlines
1h 41mORD-YYZ
C$ 342
12/12Thu
directAir Transat
1h 50mYTZ-MDW
15/12Sun
directAir Transat
1h 42mMDW-YTZ
C$ 356
13/12Fri
1 stop
5h 31mYYZ-ORD
17/12Tue
direct
1h 47mORD-YYZ
C$ 362
12/12Thu
1 stopUnited Airlines
9h 35mYYZ-ORD
15/12Sun
directUnited Airlines
1h 39mORD-YYZ
C$ 363
12/12Thu
directAir Transat
1h 50mYTZ-MDW
15/12Sun
directAir Transat
1h 42mMDW-YTZ
C$ 365
13/12Fri
direct
2h 07mYYZ-ORD
17/12Tue
direct
1h 41mORD-YYZ
C$ 366
12/12Thu
directLufthansa
2h 13mYYZ-ORD
15/12Sun
directLufthansa
1h 39mORD-YYZ
C$ 372
12/12Thu
directLufthansa
2h 13mYYZ-ORD
15/12Sun
directLufthansa
1h 39mORD-YYZ
C$ 373

Search by stops

Search by airline

Search by price

Recent one-way flight deals

12/2Wed
directAir Canada
1h 51mYYZ-ORD
C$ 159
14/12Sat
directPorter Airlines
1h 50mYTZ-MDW
C$ 186
14/12Sat
directPorter Airlines
1h 50mYTZ-MDW
C$ 190
17/12Tue
directUnited Airlines
1h 57mYYZ-ORD
C$ 205
14/12Sat
1 stopAir Canada
7h 20mYTZ-ORD
C$ 205
18/12Wed
1 stopUnited Airlines
7h 16mYYZ-ORD
C$ 212
14/12Sat
1 stopDelta
8h 30mYYZ-ORD
C$ 231
16/12Mon
1 stopDelta
5h 31mYYZ-MDW
C$ 231
10/12Tue
1 stopAmerican Airlines
5h 50mYUL-ORD
C$ 233
5/12Thu
directAmerican Airlines
2h 15mYYZ-ORD
C$ 247

Search by stops

Search by airline

Search by price

Last minute flights from Ontario to Illinois

Last minute flight, train and bus deals

25/11Mon
directPorter Airlines
1h 50mYTZ-MDW
9/12Mon
directPorter Airlines
1h 42mMDW-YTZ
C$ 524
26/11Tue
multi-stop
23h 36mYUL-ORD
3/12Tue
multi-stop
27h 59mORD-YUL
C$ 526
26/11Tue
directAir Transat
1h 50mYTZ-MDW
18/1Sat
directAir Transat
1h 42mMDW-YTZ
C$ 530
26/11Tue
directAmerican Airlines
2h 00mYYZ-ORD
4/12Wed
multi-stopAmerican Airlines
4h 58mORD-YYZ
C$ 566
26/11Tue
multi-stopWestJet
4h 37mYYZ-MDW
3/12Tue
multi-stopWestJet
13h 11mMDW-YYZ
C$ 566
24/11Sun
multi-stopWestJet
13h 32mYUL-MDW
27/11Wed
multi-stopWestJet
8h 16mMDW-YUL
C$ 567
25/11Mon
directAmerican Airlines
2h 15mYYZ-ORD
9/12Mon
directAmerican Airlines
1h 50mORD-YYZ
C$ 569
25/11Mon
directAir Canada
2h 35mYUL-ORD
4/12Wed
multi-stopAir Canada
6h 48mORD-YUL
C$ 570
26/11Tue
directAir Transat
1h 50mYTZ-MDW
4/12Wed
directAir Transat
1h 42mMDW-YTZ
C$ 576
26/11Tue
directAir Canada
1h 51mYYZ-ORD
21/1Tue
directAir Canada
1h 41mORD-YYZ
C$ 580

Search by stops

Search by airline

Search by price

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.

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.