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Find cheap flights from Chicago O'Hare Airport to Ontario from $72

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from O'Hare Intl to Ontario departing on 5/29. 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
Fr 5/31
Fr 6/7

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Best Ontario Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Toronto
Toronto1 stop$171
Ottawa
Ottawa1 stop$327
Thunder Bay
Thunder Bay1 stop$578
London
London1 stop$774

Good to know

Low season

January

High season

June

Cheapest flight

$72
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly with an average 16% increase in price.
Flight from Chicago O'Hare Airport to Toronto Pearson Airport

FAQs - booking Ontario flights

  • How does KAYAK find such low prices on flights from Chicago O'Hare Airport to Ontario?

    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 Chicago O'Hare Airport to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Chicago O'Hare Airport 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 Chicago O'Hare Airport to Ontario?

    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 Ontario with an airline and back to Chicago O'Hare Airport with another airline.

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

    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 Ontario from Chicago O'Hare Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Ontario

  • Morning departure is around 2% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from O'Hare Intl to Ontario

 
Need help choosing which airline to fly with from O'Hare Intl to Ontario? 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.
8.3
EVA AirOverall score based on 1548 reviews
8.2Comfort
8.4Boarding
8.6Crew
8.0Entertainment
8.0Food
Airline reviews

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

10.0 ExcellentDamian, Mar 2024LAX - TPE
Read more about EVA Air reviews

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

Eva Air's Business Class is pretty decent. With the given price, I think that the food can be better.

Pleasant, comfortable, and entertaining. All told, ZERO issues with it. And sadly, so far the flight was WAY more comfortable than the hellhole that is "Lambug Beach Resort" at Badian Beach!

It was a pleasant fly with Eva Air from NYC to Taipei. The crew were friendly and the food was exceeded my expectation.

Eva air is a good airline. The seats on the way to Taipei could have certainly been more comfortable, but all in all it was a pretty good experience.

Overall the flight was what might be expected for a long haul flight to Asia in economy class. The cabin crew was attentive and the food was good. Boarding was fairly fast and easy. The one thing I found frustrating was the EVA app. It is terrible. Trying to do anything on it was almost impossible.

EVA would not help with ticket issue since they were purchased through a travel agency. Even though it was EVA ticket stock. Travel agency Budget Air didn't reissue ticket after airline change which I didn’t learn until trying to checkin on Christmas Day and there was no contact number for the agency to help. I will never use Budget Air to purchase flight again and disappointed in EVA’s refusal to help. Thankfully just under 12 hrs before departure someone from the agency was available to reissue tickets. I was starting to think we would not be flying and the stress trying to resolve was completely unacceptable.

seamless check in/ friendly staff, food is good, always love flying Eva Air

Very uncomfortable and crowded seats in economy. Flight attendant refused request to move to nearby unused seat with more legroom because “It was more money for that seat”. It was also near impossible to reach airline directly by phone. Waits upwards of an hour and not very helpful customer service representatives after long wait. Cannot recommend this airline.

My experience with Eva sir was good except the long walk in LA Lex, that was inconvenient for my age,

The overall flight went well and the aircrew was pleasant.

Cathay Pacific seems to be an airline in trouble and on its way out. Lots of broken or poorly functioning things like entertainment screens, seats, and enough well trained staff to handle a full flight. Sad...

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

Excellent. Planes are a little older and could get some refurbishment, but besides that everything was excellent.

While I was in great pain, the seat was sufficiently comfortable to allow me to rest and not be in so much pain.

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.

My seat was sold off to someone else. Had to wait 9 hours to catch the next filght. Definitely will never use Cathay Pacific again. Bad, very bad airline. will comment on google reviews too.

Very poor check-in experience, and flight meal service was very disappointing with no drinks service or hot meal.

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.

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

Nothing beats ANA customer service on my opinion. Maybe because of their Japanese culture (and food). Arigatō

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

Flight delayed for 2 hours due to a part. The plane sat waiting for boarding for a long time and during final preflight inspection the issue was found. Why not do the preflight inspection sooner if you know the plane is being used?

The flight experience was very good! Especially the United Club!

I was not able to buy food in the flight. They refer to include your Credit card in the APP, and if you are not from USA (i have a credit card form Canada) it is not possible

Aircraft has better leg room than any of United's larger planes. We had requested mobility assistance for this and related flights. United's response to all was superb.

The flight from Ottawa to Chicago took a lot longer due to DC in Ottawa. We got to Chicago and went to our gate to catch our flight. We only had nine minutes I found that very stressful.

Good boarding. Crew started quick with drinks and food. They came around several times for trash which I really liked. Other than turbulence due to storms in the area, flight was great.

It was spectacular. I had basic Economy and was given so much space and their seats lean back so far. Staff was superb, food was superb, everything was superb, Finnair is Fantastic.

Good flights. Departure and arrivals were on time. DFW was a little problematic in that the Skytrain without prior notice bypassed the Echo terminal so that delayed my arrival at my connecting flight.

Because I can’t stand very long in one place, I was allowed to reword.

We were delayed bc ground crew gave the flight crew the wrong paperwork. We taxiied to the runway then back to the gate to get the correct paperwork that no one bothered reviewing the first time we pushed back. Boarding was rude and stressful like it always is. Gate agents and flight attendants are all over 55 years of age, embittered by years of underpayment From AA leading to their passive agressive bitchiness for no reason.

Boarding time was easy & quick. Crew was excellent. In-flight entertainment was great/easy. Seats are too small and not enough room between rows: felt like a sardine/very cramped.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

Excellent- plan was barely populated. I cannot remember a flight where I was able/encouraged to stretch out!

Great flight. Boarding was efficient and quick. On time departure and smooth flight. Flight arrived early at destination. Good experience.

Had technical issue which delayed the flight period. Flight crew knew there was 5 passengers that the connecting flight was within 15 minutes once at the gate. Rather than identify the 5 passengers to assure they got first. The flight attended mentioned it but didn't assist to assure passengers with connecting flights off first. This caused a hardship and our party of 3 missed the connecting flight.

I don't like that I have to pay if I want extra leg room. The seats are so expensive; I sit in normal seats and my legs and knees cramp the entire flight. I never feel comfortable on AA flights.

I had no legroom, although I paid for extra legroom. I could barely put my bag in front of my feet and under the seat. The Wi-Fi was horrible. In fact the flight attendant said that they had to reboot it and see if it was going to work and never did.

The guy with severe body odor sat next to me. For the whole duration of the flight it was a torture. The airline should have better policy on limiting people with bad body odor to board the flight. Passengers should not be the ones to endure bad odor for the whole duration of the flight. The airline should be e the one to ensure decent air quality for ever passenger.

Overall it was a miserable experience... I will never fly spirit for more than a 3 hour flight or overnight.

The boarding attendant was slightly rude when I asked about checking our stroller. Made me feel like I was bothering her.

My wife and I are both handicapped and at boarding they upgraded us to a seat closer to the front rather than all the way towards the back. Much appreciated.

Not much seat room, but that was unexpected. But the seat headrest was very uncomfortable.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries. They dont really bother you about carry-on size, I brought a descent sized backpack and they didnt even check.

Spirit canceled the flight in March and never notified me!

Seats suck, not enough room, overcrowded planes, hectic situation all together.

Book cheap flights from Chicago to Ontario

Recent round-trip flight deals

5/29Mi
1 stop
18h 20mORD-YYZ
6/5Mi
1 stop
17h 23mYYZ-ORD
$171
5/29Mi
2 stops
15h 35mORD-YYZ
6/5Mi
1 stop
17h 23mYYZ-ORD
$185
6/14Fr
nonstopAir Canada
1h 45mORD-YYZ
7/24Mi
nonstopAir Canada
1h 54mYYZ-ORD
$311
6/8Sa
nonstopAir Canada
1h 43mORD-YYZ
7/21So
nonstopAir Canada
1h 54mYYZ-ORD
$314
6/6Do
1 stopAmerican Airlines
8h 10mORD-YYZ
6/11Di
nonstopAmerican Airlines
1h 55mYYZ-ORD
$324
5/15Mi
nonstopUnited Airlines
1h 53mORD-YYZ
5/22Mi
nonstopUnited Airlines
2h 04mYYZ-ORD
$325
5/31Fr
nonstopAmerican Airlines
1h 40mORD-YYZ
6/7Fr
1 stopAmerican Airlines
5h 35mYYZ-ORD
$328
6/1Sa
1 stopDelta
4h 30mORD-YYZ
6/8Sa
1 stopDelta
5h 18mYYZ-ORD
$335
6/13Do
1 stopDelta
7h 38mORD-YYZ
7/20Sa
1 stopDelta
4h 10mYYZ-ORD
$336
6/11Di
1 stopUnited Airlines
7h 49mORD-YYZ
6/17Mo
nonstopUnited Airlines
1h 56mYYZ-ORD
$345

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Recent one-way flight deals

5/29Mi
2 stops
21h 20mORD-YYZ
$72
6/5Mi
1 stop
18h 20mORD-YYZ
$74
7/31Mi
nonstopAmerican Airlines
1h 50mORD-YYZ
$133
7/4Do
1 stopAir Canada
5h 57mORD-YYZ
$138
7/5Fr
nonstopAir Canada
1h 48mORD-YYZ
$139
6/17Mo
1 stopUnited Airlines
9h 13mORD-YYZ
$141
6/19Mi
1 stopDelta
7h 38mORD-YYZ
$142
6/9So
1 stopAmerican Airlines
4h 43mORD-YYZ
$144
6/6Do
nonstopUnited Airlines
1h 43mORD-YYZ
$147
6/9So
1 stopDelta
8h 25mORD-YYZ
$168

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Last minute flights from O'Hare Intl to Ontario

Last minute flight, train and bus deals

5/6Mo
multi-stop
34h 50mORD-YYZ
5/11Sa
multi-stop
12h 10mYYZ-ORD
$329
5/6Mo
multi-stop
22h 43mORD-YYZ
5/11Sa
multi-stop
12h 10mYYZ-ORD
$343
5/6Mo
nonstopAmerican Airlines
1h 35mORD-YYZ
5/11Sa
nonstopAmerican Airlines
1h 55mYYZ-ORD
$528
5/4Sa
nonstopAmerican Airlines
1h 45mORD-YYZ
5/11Sa
nonstopAmerican Airlines
1h 56mYYZ-ORD
$531
5/2Do
multi-stopDelta
8h 15mORD-YYZ
5/6Mo
multi-stopDelta
5h 11mYYZ-ORD
$584
5/3Fr
nonstopUnited Airlines
1h 42mORD-YYZ
5/6Mo
nonstopUnited Airlines
2h 04mYYZ-ORD
$587
5/4Sa
multi-stopAir Canada
5h 54mORD-YTZ
5/7Di
multi-stopAir Canada
5h 55mYTZ-ORD
$591
5/4Sa
nonstopAir Canada
1h 45mORD-YYZ
5/10Fr
multi-stopAir Canada
8h 30mYYZ-ORD
$592
5/3Fr
nonstopUnited Airlines
1h 45mORD-YYZ
5/3Fr
multi-stopUnited Airlines
4h 47mYYZ-ORD
$628
5/3Fr
multi-stopDelta
7h 24mORD-YYZ
5/6Mo
multi-stopDelta
5h 51mYYZ-ORD
$649

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Chicago O'Hare Airport - Ontario Flights

Departure:

Chicago O'Hare Airport (ORD)United States

Return flight deals:

Ontario - Chicago O'Hare Airport

Cabin classes:

$984
$382
$1,199
$142