C$ 182 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 19/2. 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.
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Good to know

Low season

January

High season

August

Cheapest flight

C$ 182
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (9% 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

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 283 reviews
7.6Food
8.7Crew
8.0Comfort
7.0Entertainment
8.1Boarding
Airline reviews

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

10.0 ExcellentJoan, Nov 2024YOW - YYZ
Read more Porter Airlines reviews

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

Lavatories broke with an hour to go. At least we were on time.

Chaotic boarding, but mostly my issues are with Toronto airport

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.

The flights were on time and the crew was friendly and helpful. The food was ok. The seats were quite cramped and if the seat in front was tipped back there was very very little room. The entertainment was only on your own device and there was no usb charging

Boarding and staff were excellent. The food was ok. Very cramped seating. No existent entertainment other than on iPhone over wifi with poor choices of movie or shows. Bring your own entertainment. Nowhere to charge your phone

Delay was not properly communicated. Service, plane, value of ticker were all great.

Excellent service and food in the Club Class. Warmly recommend. Much better than AC.

My new suitcase got busted when I arrived at Toronto , two of the wheels are broken and can no longer be used , I am very disappointed over this situation but the flight and service was awesome .

They needed people to check a bag, they did check my bag and I had to wait 10 minutes after the flight to get it it wasn’t too bad

Did not even get on board. Was told I needed an esta agreement. Was not aware of this when I booked the fare and not told about them

Cramped seats. Audio jack for the in -flight entertainment was broken.

Flight was great albeit the long line before the int’l immigration given the timing of the year.

They canceled our flight and left us stranded to figure it out

We appreciated the friendly, efficient, and professional flight attendants. A wider selection of hot foods would be nice.

United airlines was top for my last trip in every way

Connection coordination with Star Alliance partner could be better. Lots of check in setup was not interlinked between operators.

Did not have enough time from Venice seaport at Ravenna to get to Venice airport in order to make the scheduled flights. Need to have at least 3+ hours from ship docking to airport.

Everything was very good. Was able to change a make run flight leaving on direct earlier in the app -seamless!!! Well done

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.

The flight encountered a delay exceeding 4 hours. The food voucher issued was valued at $12, insufficient to cover our meal expenses. Consequently, I was unable to take my medication, leading to a drop in blood sugar levels and exacerbating my anxiety.

Airplane was cold. Flight attendants were rude. Phone charger did not work. No food available.

3hour delay In the last 3 months i had 3 flights and 2 of these had a more than 2:40 hrs delayed

My initial flight to ORD was extended without reason. We circled the airport a few time and then drove on the ground for at least 20 minutes. These kinds of delays are annoying but somewhat expected… it would be nice if the crew would make an announcement to give updates on how long we could expect to be delayed.

Fantastic. I am low vision and was impressed with how helpful and accommodating the service tam was. It was super appreciated! I was pleasantly surprised about how delicious the food was. Like, “I wish I had more even though I’m no longer hungry” delicious. 100% enjoyable trip.

The flight was uneventful. What was a problem was I was delayed getting home one entire day because the flight from Sacramento was delayed. That made getting to my connecting flight impossible. I had to stay another night at the hotel and incur that expense as a result.

Flights were on time both ways, such a big plus! Staff was very accommodating and friendly. Question the choice of snacks that, which on both flights was dairy based. Appreciated using bottled water.

Service was excellent, but they ran out of food options by the time they got to my seat (row 36).

The idea of needing to go outside in the winter to board in icy cold temperatures is totally a non starter for me. Seats were very uncomfortable though the leg room not too terrible. Attendants were nice

The experience was good. Flight was on time. Liked how they offered to accept carryon baggage for free before as I was checking in online.

Flight was delayed by 45 min. No problems. Everyone took it in stride.

Crew was friendly and helpful; cabin seemed roomy even in economy class.

The flight attendants that assisted me were exceptionally nice, kind and helpful

Something wrong with the plane so had to deplane and waited over 2 hours to finally leave

AC needs to update their fleet. Too many mechanical issues, dated planes and too many delays

They charge 5 dollars for plastic headphones for a flight of 1 hour! Seats are awful. Service is terrible.

was wondreful! just let me know what airline im flying in advance!

Book cheap flights from Ontario to Illinois

Recent round-trip flight deals

14/2Fri
directPorter Airlines
1h 50mYTZ-MDW
17/2Mon
directPorter Airlines
1h 42mMDW-YTZ
C$ 330
13/2Thu
directPorter Airlines
1h 50mYTZ-MDW
16/2Sun
directPorter Airlines
1h 42mMDW-YTZ
C$ 332
23/1Thu
directAmerican Airlines
2h 15mYYZ-ORD
26/1Sun
directAmerican Airlines
1h 41mORD-YYZ
C$ 368
23/1Thu
directAmerican Airlines
2h 15mYYZ-ORD
26/1Sun
1 stopAmerican Airlines
4h 45mORD-YYZ
C$ 381
13/2Thu
directAir Transat
1h 50mYTZ-MDW
16/2Sun
directAir Transat
1h 42mMDW-YTZ
C$ 401
23/1Thu
1 stopAir Canada
5h 30mYTZ-ORD
27/1Mon
1 stopAir Canada
5h 15mORD-YTZ
C$ 411
8/1Wed
directAir Canada
2h 10mYYZ-ORD
31/1Fri
directAir Canada
1h 41mORD-YYZ
C$ 414
19/1Sun
directUnited Airlines
1h 51mYYZ-ORD
22/1Wed
directUnited Airlines
1h 41mORD-YYZ
C$ 431
7/1Tue
directUnited Airlines
2h 10mYYZ-ORD
8/1Wed
1 stopUnited Airlines
4h 28mORD-YYZ
C$ 437
1/1Wed
directAir Transat
1h 50mYTZ-MDW
1/1Wed
directAir Transat
1h 42mMDW-YTZ
C$ 626

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Recent one-way flight deals

19/2Wed
1 stop
8h 25mYYZ-ORD
C$ 182
19/2Wed
1 stop
10h 38mYYZ-ORD
C$ 193
13/2Thu
directPorter Airlines
1h 50mYTZ-MDW
C$ 193
18/1Sat
directPorter Airlines
1h 50mYTZ-MDW
C$ 208
22/1Wed
directAmerican Airlines
2h 15mYYZ-ORD
C$ 218
15/1Wed
directAmerican Airlines
2h 15mYYZ-ORD
C$ 234
22/1Wed
1 stopAir Canada
5h 30mYTZ-ORD
C$ 236
19/1Sun
directUnited Airlines
1h 51mYYZ-ORD
C$ 236
18/1Sat
1 stopAir Canada
7h 20mYTZ-ORD
C$ 243
19/1Sun
directUnited Airlines
2h 10mYYZ-ORD
C$ 250

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Last minute flights from Ontario to Illinois

Last minute flight, train and bus deals

25/12Wed
directPorter Airlines
1h 50mYTZ-MDW
25/1Sat
directPorter Airlines
1h 42mMDW-YTZ
C$ 512
26/12Thu
directPorter Airlines
1h 50mYTZ-MDW
29/1Wed
directPorter Airlines
1h 42mMDW-YTZ
C$ 513
25/12Wed
directAmerican Airlines
2h 15mYYZ-ORD
25/1Sat
directAmerican Airlines
1h 35mORD-YYZ
C$ 543
25/12Wed
directAmerican Airlines
2h 00mYYZ-ORD
25/1Sat
multi-stopAmerican Airlines
7h 46mORD-YYZ
C$ 558
26/12Thu
directAir Canada
1h 51mYYZ-ORD
29/1Wed
multi-stopAir Canada
6h 21mORD-YYZ
C$ 606
23/12Mon
directUnited Airlines
1h 57mYYZ-ORD
6/1Mon
multi-stopUnited Airlines
11h 53mORD-YYZ
C$ 616
23/12Mon
multi-stopUnited Airlines
11h 32mYYZ-ORD
6/1Mon
multi-stopUnited Airlines
15h 34mORD-YYZ
C$ 624
25/12Wed
multi-stopAir Canada
5h 20mYTZ-ORD
25/1Sat
multi-stopAir Canada
4h 49mORD-YTZ
C$ 629
22/12Sun
directAir Transat
1h 50mYTZ-MDW
2/1Thu
directAir Transat
1h 42mMDW-YTZ
C$ 743
23/12Mon
directAir Transat
1h 50mYTZ-MDW
30/12Mon
directAir Transat
1h 42mMDW-YTZ
C$ 757

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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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