C$ 124 Find Cheap Flights from Ontario to Illinois

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Illinois departing on 24/5. 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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Low season

January

High season

August

Cheapest flight

C$ 124
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly (3% more expensive on average)
Flight from Toronto Pearson Airport to Chicago O'Hare Airport

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.

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 from Ontario to Illinois is likely to change within 7 days, so travellers 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 from Ontario to Illinois with an airline and back 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 from Ontario to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 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.
7.9
Porter AirlinesOverall score based on 276 reviews
6.9Entertainment
7.6Food
8.7Crew
8.0Comfort
8.2Boarding
Airline reviews

The staff is always great. Just the fact that our flight was the only one delayed from Halifax when all other carries were still flying. It happen a year ago out of Toronto as well. All others were flying but our flight got cancelled 1 hr before the time of departure.

4.0 OkayJason, Feb 2025YHZ - YUL
Read more Porter Airlines reviews

The staff is always great. Just the fact that our flight was the only one delayed from Halifax when all other carries were still flying. It happen a year ago out of Toronto as well. All others were flying but our flight got cancelled 1 hr before the time of departure.

The only issue had when i mentioned about comfort was the man beside me was on the larger side and took about 1/3 of my seat where i was pressed against the wall/window of the plane for the trip.

The check-in staff, boarding staff, and flight crew were all very friendly. Really miss the Porter lounge in Ottawa.

Thanks for giving a beer to everyone in the seat infront of me and then telling me that I can’t have one because they are going to land. I guess I need to pay for a seat and then pick one in the very front of the plane

The flight was delayed by more than one hour. The terminal was consequently overcrowded and hot. We lost our car reservation and hit rush hour traffic in Boston, which added two hours stuck in traffic to our trip.

Awesome, the whole way through. Thank you, this is the new Canadian Airline benchmark.

We were given a complimentary seat upgrade which was so unexpected but so lovely!

Porter was excellent. Boarding was a breeze. The seats were a little uncomfortably but the overall trip was excellent.

Only packaged snacks were served. It was a flight at lunchtime and a hot meal would have been a great.

Reserve check-in was very slow compared to regular check-in. Internet was slow

Over the wing seat at emergency exit only downside people using lavatory have no respect and wait in the space

Flight delayed any hour and couple of big gate changes

The pilot came out and chatted with the passengers. He explained why there was a slight delay. The crew was excellent. Very helpful. I had to buy meals for my whole family and they were in different seats, so the crew had to deal with that. They were very pleasant and accommodating and did a great job!

We were unable to land in Liberia. It was not the airline’s fault, but we had to be diverted to SJO.

We had things stolen from our luggage, we also were refused an upgrade on a flight that was not full.

When we left, it wasn't Great . People were drinking heavily, very disrespectful Extremely loud, the entire trip. I think the crew members, should have get their attention. Coming back was great.

I sat in the club. The seeds were fantastic. The meal was great and Entertainment was good. The crew was fantastic. I recommend it to everybody.

The food was small portions and not fresh. I was seated at the back of the plane so by the time the cart approached me most of the food options were sold out. The cabin crew was fantastic however.

Great flight and crew. Food isn't free and neither are headphones...

We were in economy class but paid for option Plus which offer you an extra snack after take off, free earplugs & blanket. The crew were very attentive. The comfort however wasn’t great, hard to be comfortable in such restraint place. Wasn’t able to sleep through out the 7hrs flight and was exhausted upon arrival.

Very modern plane. Good seat spacing. Meals were good. Screens had tons of movies and worked

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago

The flight was delayed, it took longer than anticipated because of weather, and they broke my luggage.

The aircrew was solid, the flight was chill, I had no issues. The gate agent was not the best. I was trying to use a military bag upgrade to move my bag from under the seat to the overhead bins and he told me there’s no overhead bins on the plane, argued with me why booking put a military member in basic economy (I don’t really understand this) and made it an issue to even try to help me stating I’d have to call reservations to get a bag upgrade. When every other agent with United can add it at the gate, this man couldn’t be bothered.

Everything was good. Flight was on time, luggage pickup was quick. The staff were great. Could not ask for anything more.

lots of delays the crew were unclear about where to pick up my carry-on, which they took from me to check in on the plane.

Per usual, flight status, staff courtesy and professionalism were excellent

Everything was on time, we arrived early, everything worked well.

The only thing is if Wi-Fi is available after you land and taxi to the gate. It takes forever to get to the gate, and having the Wi-Fi continue would be great to bide the time at least 5 minutes before you arrive at the entrance. That is my only comment; otherwise, everything was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

Flight delayed, missed connection, had to stay overnight. Next flight instead of our business class we were booked on the very back row. Second time this had happened in 2 months.

Seating was horrible. Small seats. Access to flight information and extras very iser unfriendly. Kept losing internet after paying for it. Staff in madison was as unprofessional and unhelpful.

Delayed due to no crew. On a major holiday travel day.

Other than being delayed 5.5 hours and having to get a hotel because I missed my connecting flight, it was an okay flight. No in-flight Wi-Fi or entertainment.

It was nice being on a flight that had working wifi. The boarding was quick - why don’t all airlines have small boarding groups window to aisle? Makes so much sense!!! I was disappointed to be the first person stopped to have to gate check my carryon. Especially when there was plenty of overhead space at the back! But I get it…keeps it moving. Crew was nice.

The flight from Buffalo to Chicago was on an older and smaller plane. Seating was tight. Looking closely at the interior of the aircraft there were definitely signs of aging and wear.

My flight was cancelled and I was left to figure out where to find a hotel, something to eat and how to get a new flight at 11:30pm. Wasted a day. Thanks, Air Canada!

flight was delayed 6 hours for weather, then cancelled because of the crash in toronto, but none of the links to cancel or rebook my flights are working

They kept changing the gate (6 times in 30 minutes) and then left us on the plane for 4 hours before departure. Likely was the storm, which is understandable, but the lack of communication and the e constant running between gates at opposite ends of the airport really threw me and my friend for a loop.

Legitimately everything about this flight was awful, was also so delayed I never want to use air Canada again

Terrible all around. Flight was late and airplane was very uncomfortable. The crew were unhelpful and hid in the back. Did zero work. No entertainment.

I like the free beer and wine but not the delays to the departure time.

Never again flying economy on Rouge!!! Literally like sardines!!! Will try to change to better seats 3 seat arrangement only so so if traveling with family. Who wants to squished to stranger!!😖 Can’t say enough bad about this!!!

I booked and paid extra for exit door seats also pre paid for my luggage air Canada changed plains and I never got what I paid for and they made me pay for luggage again they also did this to my wife. They are the most unorganized company I have ever dealt with. I am sure I will never see the extra money I paid for the seats or the recharge for the luggage. They are subsidized by the taxpayers and don’t give a dam just a horrible way to do business

Overall the experience was excellent. Plane was clean but more importantly quiet. Recently, I’ve noticed that Airbus planes seem quieter than their Boeing counterparts. I definitely prefer flying in an Airbus plane.

Delay after delay.......they are awful Delayed because of cold wx really!!!!! We live in Canada

Book cheap flights from Ontario to Illinois

Recent round-trip flight deals

24/5Sat
directAir Canada
1h 55mYYZ-ORD
7/6Sat
directAir Canada
1h 42mORD-YYZ
C$ 124
24/5Sat
1 stopAir Canada
5h 12mYYZ-ORD
7/6Sat
directAir Canada
1h 42mORD-YYZ
C$ 203
20/3Thu
directPorter Airlines
1h 50mYTZ-MDW
24/3Mon
directPorter Airlines
1h 42mMDW-YTZ
C$ 267
14/3Fri
directPorter Airlines
1h 50mYTZ-MDW
17/3Mon
directPorter Airlines
1h 42mMDW-YTZ
C$ 276
20/3Thu
directAir Transat
1h 50mYTZ-MDW
27/3Thu
directAir Transat
1h 42mMDW-YTZ
C$ 317
21/3Fri
directUnited Airlines
2h 09mYYZ-ORD
25/3Tue
1 stopUnited Airlines
6h 55mORD-YYZ
C$ 321
17/3Mon
directAir Transat
1h 50mYTZ-MDW
20/3Thu
directAir Transat
1h 42mMDW-YTZ
C$ 325
26/4Sat
1 stopUnited Airlines
4h 59mYYZ-ORD
30/4Wed
1 stopUnited Airlines
4h 54mORD-YYZ
C$ 349
21/3Fri
1 stopAmerican Airlines
8h 11mYUL-ORD
28/3Fri
1 stopAmerican Airlines
9h 48mORD-YUL
C$ 385
5/4Sat
directAmerican Airlines
2h 35mYUL-ORD
7/4Mon
1 stopAmerican Airlines
11h 16mORD-YUL
C$ 391

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Recent one-way flight deals

22/3Sat
directPorter Airlines
1h 50mYTZ-MDW
C$ 166
13/3Thu
directPorter Airlines
1h 50mYTZ-MDW
C$ 168
1/4Tue
1 stopAir Canada
5h 07mYTZ-ORD
C$ 183
28/5Wed
directAir Transat
1h 49mYTZ-MDW
C$ 188
1/4Tue
1 stopAir Canada
5h 49mYYZ-ORD
C$ 192
22/3Sat
directUnited Airlines
1h 51mYYZ-ORD
C$ 193
20/3Thu
directAir Transat
1h 50mYTZ-MDW
C$ 197
28/5Wed
directUnited Airlines
2h 00mYYZ-ORD
C$ 210
22/4Tue
directAmerican Airlines
2h 35mYUL-ORD
C$ 213
30/3Sun
directAmerican Airlines
2h 15mYYZ-ORD
C$ 234

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Last minute flights from Ontario to Illinois

Last minute flight, train and bus deals

25/2Tue
multi-stop
23h 23mYYZ-ORD
2/3Sun
multi-stop
17h 42mORD-YYZ
C$ 399
25/2Tue
multi-stop
15h 25mYYZ-ORD
2/3Sun
multi-stop
17h 42mORD-YYZ
C$ 411
24/2Mon
directPorter Airlines
1h 50mYTZ-MDW
24/3Mon
directPorter Airlines
1h 42mMDW-YTZ
C$ 455
23/2Sun
directAir Canada
1h 51mYYZ-ORD
26/3Wed
multi-stopAir Canada
4h 20mORD-YYZ
C$ 521
24/2Mon
directAir Canada
2h 01mYYZ-ORD
24/3Mon
multi-stopAir Canada
4h 20mORD-YYZ
C$ 527
26/2Wed
multi-stopPorter Airlines
6h 20mYUL-MDW
5/3Wed
multi-stopPorter Airlines
5h 45mMDW-YUL
C$ 547
25/2Tue
directAmerican Airlines
2h 00mYYZ-ORD
2/3Sun
directAmerican Airlines
1h 40mORD-YYZ
C$ 599
25/2Tue
directAmerican Airlines
2h 00mYYZ-ORD
2/3Sun
multi-stopAmerican Airlines
5h 00mORD-YYZ
C$ 614
24/2Mon
directUnited Airlines
2h 09mYYZ-ORD
28/2Fri
multi-stopUnited Airlines
4h 46mORD-YYZ
C$ 672
22/2Sat
directUnited Airlines
2h 05mYYZ-ORD
24/2Mon
directUnited Airlines
1h 47mORD-YYZ
C$ 697

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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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