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Find cheap flights from Chicago O'Hare Airport to Ontario from $87

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 9/4. 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
Thu 7/11
Thu 7/18

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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$253
Ottawa
Ottawa1 stop$329
Thunder Bay
Thunder Bay1 stop$405
London
London2 stops$682

Good to know

Low season

January

High season

July

Cheapest flight

$87
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 2% 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 7% cheaper 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 1488 reviews
8.6Crew
8.2Comfort
8.4Boarding
8.0Food
8.0Entertainment
Airline reviews

The crew was very helpful. Food was prepared with great care and tasted wonderful. Movie selection was a bit limited. The bedding on the seat is a little too thin for sleeping.

10.0 ExcellentBinhui, Jun 2024IAH - TPE
Read more about EVA Air reviews

The crew was very helpful. Food was prepared with great care and tasted wonderful. Movie selection was a bit limited. The bedding on the seat is a little too thin for sleeping.

Their announcement was not quite clear in Chinese. The rest is pretty good.

The hygiene of the bathrooms were terrible. Urine smells leaked out into the cabin and the seats were really tight, even for a petite woman like myself. Flight attendants did not go through the cabin enough to offer refreshments.

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.

Great, the flight attendants were very friendly and the food was also good.

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.

Not good. Flight was purchased for my father who needed medical assistance to board and transfer due to a heart condition. No one at Hong Kong from Cathay was there to assist and he barely made the connection. When I talked to him he could barely breath and was not sure he was going to make it. Really poor service even though the ticket stated he needed a wheelchair assistance.

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.

Flighty delayed on boarding - then group 1 had to check their carry on bags but groups 3 and beyond could carry bags on - very inconvenient for weekend business trip with no checked baggage. Then delayed on the runway - before take off. No communication from pilot on why or how long. Wifi/Entertainment didn't work for 4+ flight. Upon arrival, attendants announced wrong carousel for baggage claim - everyone was waiting at the wrong place for their checked bags. This was a mess united!

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

Standard flight experience, but there is only power at the seat to row 20 on the aircraft, on my initial check in it did not say that was the case

Energetic crew - flight full of swiftied going to Taylor's opening show in Paris! Long lines for bathroom made out kind of suck though

I’ve had a couple flights this week on United that were delayed by an hour or more

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?

My husband and I pre-ordered our food, but they did not have my husband’s order, and my cheese plate was very average. I asked for a blanket and was told they don’t carry blankets on domestic routs. The flight was on time and smooth!

Original flight delayed several times and finally canceled at 2:30 in the morning. Staff at the gate was not very helpful in resolving problems or communicating why there were delays. I spent 34 hours at the airport before I could leave, they couldn't book me on another early flight even after canceling my original flight. Next flight available after my original flight was canceled was 22 hours later. I will never fly American Airlines again.

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.

My flight was uncomfortable and crammed. There were no pockets to store things, I couldn’t move my seat back slightly. Beverages including soda cost extra. My husband flew on another spirit airline flight, which was delayed a total of 48 hours, only to be canceled.

Two delays in less than 24hrs. They need to improve everything and restructure the whole company.

Terrible leg room, seats don’t recline, delayed flight, and even water isn’t free onboard

Flight was canceled less than 6 hours before takeoff, rebooked on a flight that was twice as long and left earlier so we couldn’t make it, when using text support option took over 2 hours to speak with someone.

Not enough help at airport during boarding process. Flight was delayed. Overall WORST flying experience I’ve ever had. Will NEVER FLT SPIRIT AGAIN

Terrible legroom, seats do not recline, tray table the size of an iPhone, delayed flight, have to pay 5$ to get a cup of water onboard.

Could have TV/Movie and some water ou soda free

Flight was good and clean but delayed over an hour on the return flight.

The non stop flight and able to go into Atlantic City airport. They could lower the prices. It starts out low but then if you want to bring luggage and pick your seat the price goes up quite a bit.

Flight got diwngraded last minute and left us stranded. I was told I’ll be given credit for my luggage and seat upgrades but haven’t got anything yet

Book cheap flights from Chicago to Ontario

Recent round-trip flight deals

7/8Mon
1 stopAir Canada
5h 17mORD-YYZ
7/12Fri
nonstopAir Canada
2h 02mYYZ-ORD
$253
7/8Mon
1 stopAir Canada
5h 49mORD-YTZ
7/12Fri
1 stopAir Canada
5h 20mYTZ-ORD
$256
7/20Sat
nonstopUnited Airlines
1h 48mORD-YYZ
7/20Sat
1 stopUnited Airlines
4h 32mYYZ-ORD
$274
9/30Mon
1 stopAmerican Airlines
7h 30mORD-YUL
9/30Mon
1 stopAmerican Airlines
15h 21mYUL-ORD
$280
7/27Sat
nonstopUnited Airlines
1h 43mORD-YYZ
7/29Mon
nonstopUnited Airlines
1h 57mYYZ-ORD
$281
9/11Wed
1 stop
15h 20mORD-YYZ
9/25Wed
1 stop
11h 20mYYZ-ORD
$286
7/15Mon
nonstop
1h 43mORD-YYZ
7/18Thu
1 stop
6h 40mYYZ-ORD
$287
9/30Mon
1 stopAmerican Airlines
7h 30mORD-YUL
9/30Mon
nonstopAmerican Airlines
2h 36mYUL-ORD
$299
7/30Tue
1 stopDelta
4h 23mORD-YYZ
8/10Sat
1 stopDelta
3h 58mYYZ-ORD
$306
8/12Mon
1 stopDelta
6h 20mORD-YUL
8/17Sat
1 stopDelta
7h 41mYUL-ORD
$315

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Recent one-way flight deals

9/4Wed
nonstopAir Canada
1h 37mORD-YYZ
$87
9/24Tue
1 stop
7h 07mORD-YYZ
$88
7/30Tue
nonstopUnited Airlines
1h 48mORD-YYZ
$117
7/4Thu
nonstopAmerican Airlines
2h 20mORD-YUL
$124
6/29Sat
1 stopDelta
8h 25mORD-YYZ
$126
7/26Fri
1 stopUnited Airlines
7h 47mORD-YYZ
$127
7/6Sat
1 stopDelta
8h 39mORD-YUL
$128
7/3Wed
1 stopAmerican Airlines
9h 14mORD-YYZ
$137
7/7Sun
1 stopWestJet
12h 20mORD-YYZ
$148
7/22Mon
1 stopWestJet
14h 51mORD-YUL
$171

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Last minute flights from O'Hare Intl to Ontario

Last minute flight, train and bus deals

6/16Sun
nonstopAir Canada
1h 48mORD-YYZ
6/25Tue
nonstopAir Canada
1h 54mYYZ-ORD
$368
6/15Sat
multi-stop
21h 29mORD-YYZ
6/25Tue
multi-stop
8h 58mYYZ-ORD
$391
6/16Sun
nonstopUnited Airlines
1h 48mORD-YYZ
6/16Sun
nonstopUnited Airlines
1h 54mYYZ-ORD
$447
6/16Sun
multi-stopAmerican Airlines
4h 43mORD-YYZ
6/16Sun
nonstopAmerican Airlines
1h 55mYYZ-ORD
$453
6/16Sun
multi-stopAmerican Airlines
7h 53mORD-YYZ
6/22Sat
nonstopAmerican Airlines
1h 55mYYZ-ORD
$459
6/16Sun
nonstopUnited Airlines
1h 48mORD-YYZ
6/20Thu
multi-stopUnited Airlines
4h 37mYYZ-ORD
$469
6/16Sun
multi-stopWestJet
12h 20mORD-YYZ
6/22Sat
multi-stopWestJet
4h 05mYYZ-ORD
$538
6/13Thu
multi-stopDelta
3h 19mORD-YYZ
6/24Mon
multi-stopDelta
8h 09mYYZ-ORD
$544
6/13Thu
multi-stopWestJet
8h 37mORD-YYZ
6/17Mon
multi-stopWestJet
6h 47mYYZ-ORD
$551
6/13Thu
multi-stopDelta
3h 19mORD-YYZ
6/17Mon
multi-stopDelta
4h 00mYYZ-ORD
$587

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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:

$796
$213
$1,108
$132