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Cheap flights from Chicago O'Hare Intl Airport to Ontario from $106

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Ontario departing on 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago O'Hare Intl Airport to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
11:15 am - 2:30 pmORD  Chicago O'Hare Intl-YUL Montreal Pierre Elliott Trudeau Intl
2h 15mnonstop
Air Canada Logo
4:30 pm - 8:41 pmYUL  Montreal Pierre Elliott Trudeau Intl-ORD Chicago O'Hare Intl
5h 11m1 stop Toronto Island
$230Air Canada
Mon, Sep 28 - Mon, Sep 28
Air Canada Logo
8:45 am - 3:50 pmORD  Chicago O'Hare Intl-YTZ Toronto Island
6h 05m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
7:35 pm - 8:41 pmYTZ  Toronto Island-ORD Chicago O'Hare Intl
2h 06mnonstop
$235Air Canada
Thu, Sep 10 - Sun, Sep 13
United Airlines Logo
6:30 am - 2:19 pmORD  Chicago O'Hare Intl-YYZ Toronto Pearson Intl
6h 49m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
5:27 pm - 6:30 pmYYZ  Toronto Pearson Intl-ORD Chicago O'Hare Intl
2h 03mnonstop
$239United Airlines
Tue, Sep 1 - Tue, Sep 1
Lufthansa Logo
8:50 am - 11:49 amORD  Chicago O'Hare Intl-YYZ Toronto Pearson Intl
1h 59mnonstop
Lufthansa Logo
11:00 am - 12:00 pmYYZ  Toronto Pearson Intl-ORD Chicago O'Hare Intl
2h 00mnonstop
$240Lufthansa
Thu, Sep 10 - Sun, Sep 13
Lufthansa Logo
12:59 pm - 3:46 pmORD  Chicago O'Hare Intl-YYZ Toronto Pearson Intl
1h 47mnonstop
Lufthansa Logo
11:00 am - 12:00 pmYYZ  Toronto Pearson Intl-ORD Chicago O'Hare Intl
2h 00mnonstop
$243Lufthansa
Thu, Sep 10 - Mon, Sep 14
United Airlines Logo
2:52 pm - 5:56 pmORD  Chicago O'Hare Intl-YYZ Toronto Pearson Intl
2h 04mnonstop
United Airlines Logo
8:00 pm - 12:28 amYYZ  Toronto Pearson Intl-ORD Chicago O'Hare Intl
5h 28m1 stop Newark
$245United Airlines
Thu, Sep 17 - Thu, Sep 17
Porter Airlines Logo
8:03 am - 10:59 amORD  Chicago O'Hare Intl-YYZ Toronto Pearson Intl
1h 56mnonstop
Porter Airlines Logo
6:30 am - 7:40 amYYZ  Toronto Pearson Intl-ORD Chicago O'Hare Intl
2h 10mnonstop
$252Porter Airlines
Thu, Sep 10 - Sun, Sep 13
Porter Airlines Logo
8:03 am - 10:59 amORD  Chicago O'Hare Intl-YYZ Toronto Pearson Intl
1h 56mnonstop
Porter Airlines Logo
6:30 am - 7:40 amYYZ  Toronto Pearson Intl-ORD Chicago O'Hare Intl
2h 10mnonstop
$252Porter Airlines
Sat, Sep 12 - Sun, Sep 13
WestJet Logo
6:10 am - 11:35 amORD  Chicago O'Hare Intl-YYZ Toronto Pearson Intl
4h 25m1 stop Minneapolis St Paul
WestJet Logo
9:45 am - 12:59 pmYYZ  Toronto Pearson Intl-ORD Chicago O'Hare Intl
4h 14m1 stop Detroit Metropolitan Wayne County
$253WestJet
Fri, Sep 25 - Sun, Sep 27
WestJet Logo
9:18 pm - 11:59 pmORD  Chicago O'Hare Intl-YYZ Toronto Pearson Intl
1h 41mnonstop
WestJet Logo
1:30 pm - 11:59 pmYYZ  Toronto Pearson Intl-ORD Chicago O'Hare Intl
11h 29m2 stops Fort Lauderdale Atlanta Hartsfield-Jackson
$306WestJet
Thu, Sep 10 - Mon, Sep 14

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Lufthansa flights from Chicago O'Hare Intl Airport to Region of Ontario

Our best Lufthansa deals on Chicago O'Hare Intl Airport to Region of Ontario flight tickets
Lufthansa
Sep 10
ORD8:50 amChicago O'Hare Intl
1h 59m
YYZ11:49 amToronto Pearson Intl
Sep 13
YYZ11:00 amToronto Pearson Intl
2h 00m
ORD12:00 pmChicago O'Hare Intl
$240
Lufthansa
Sep 10
ORD12:59 pmChicago O'Hare Intl
1h 47m
YYZ3:46 pmToronto Pearson Intl
Sep 14
YYZ11:00 amToronto Pearson Intl
2h 00m
ORD12:00 pmChicago O'Hare Intl
$243
Lufthansa
Sep 10
ORD5:00 amChicago O'Hare Intl
5h 43m
1 stop
YYZ11:43 amToronto Pearson Intl
Sep 13
YYZ11:00 amToronto Pearson Intl
2h 00m
ORD12:00 pmChicago O'Hare Intl
$251

United Airlines flights from Chicago O'Hare Intl Airport to Region of Ontario

Our best United Airlines deals on Chicago O'Hare Intl Airport to Region of Ontario flight tickets
United Airlines
Sep 17
ORD2:52 pmChicago O'Hare Intl
2h 04m
YYZ5:56 pmToronto Pearson Intl
Sep 17
YYZ8:00 pmToronto Pearson Intl
5h 28m
1 stop
ORD12:28 amChicago O'Hare Intl
$245
United Airlines
Sep 10
ORD8:50 amChicago O'Hare Intl
1h 59m
YYZ11:49 amToronto Pearson Intl
Sep 14
YYZ8:50 amToronto Pearson Intl
2h 03m
ORD9:53 amChicago O'Hare Intl
$253
United Airlines
Sep 11
ORD8:50 amChicago O'Hare Intl
1h 59m
YYZ11:49 amToronto Pearson Intl
Sep 14
YYZ11:00 amToronto Pearson Intl
2h 00m
ORD12:00 pmChicago O'Hare Intl
$254

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Region of Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 10, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoMontreal

ORD Chicago O'Hare Intl - YUL Montreal Pierre Elliott Trudeau Intl

ORDYUL

Chicago O'Hare Intl

Mon 9/28

11:15 am-2:30 pm

Nonstop2h 15m

Montreal Pierre Elliott Trudeau Intl

Mon 9/28

4:30 pm-8:41 pm

1 stop5h 11m

$230

ChicagoToronto

ORD Chicago O'Hare Intl - YTZ Toronto Island

ORDYTZ

Chicago O'Hare Intl

Thu 9/10

8:45 am-3:50 pm

1 stop6h 05m

Toronto Island

Sun 9/13

7:35 pm-8:41 pm

Nonstop2h 06m

$235

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Tue 9/1

6:30 am-2:19 pm

1 stop6h 49m

Toronto Pearson Intl

Tue 9/1

5:27 pm-6:30 pm

Nonstop2h 03m

$239

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Thu 9/10

8:50 am-11:49 am

Nonstop1h 59m

Toronto Pearson Intl

Sun 9/13

11:00 am-12:00 pm

Nonstop2h 00m

$240
Quickest round-trip

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Thu 9/10

12:59 pm-3:46 pm

Nonstop1h 47m

Toronto Pearson Intl

Mon 9/14

11:00 am-12:00 pm

Nonstop2h 00m

$243

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Thu 9/17

2:52 pm-5:56 pm

Nonstop2h 04m

Toronto Pearson Intl

Thu 9/17

8:00 pm-12:28 am

1 stop5h 28m

$245

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Thu 9/10

8:03 am-10:59 am

Nonstop1h 56m

Toronto Pearson Intl

Sun 9/13

6:30 am-7:40 am

Nonstop2h 10m

$252

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Sat 9/12

8:03 am-10:59 am

Nonstop1h 56m

Toronto Pearson Intl

Sun 9/13

6:30 am-7:40 am

Nonstop2h 10m

$252

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Fri 9/25

6:10 am-11:35 am

1 stop4h 25m

Toronto Pearson Intl

Sun 9/27

9:45 am-12:59 pm

1 stop4h 14m

$253

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Thu 9/10

9:18 pm-11:59 pm

Nonstop1h 41m

Toronto Pearson Intl

Mon 9/14

1:30 pm-11:59 pm

2 stops11h 29m

$306

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ontario from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Region of Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Region of Ontario?

The month of February is, on average, the cheapest month to fly to Region of Ontario from Chicago O'Hare Intl Airport, with most prices found around $275. If you aren’t able to travel during the month of February, then book flights to Region of Ontario from Chicago O'Hare Intl Airport during April instead. Flights to Region of Ontario in April, while not as cheap as those in February, still average around $304.

What is the cheapest day to depart on your flight to Region of Ontario?

According to our data, Thursday is the cheapest day to fly to Region of Ontario from Chicago O'Hare Intl Airport. The lowest ticket price found for a Thursday departure recently was $418. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Chicago O'Hare Intl Airport to Region of Ontario on a Monday will generally be more expensive and average around $661. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Region of Ontario?

According to our data, the cheapest time of day to fly to Region of Ontario is in the morning. momondo users have found flights departing from Chicago O'Hare Intl Airport to Region of Ontario in the morning for as low as $436. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $780.

What is the cheapest Chicago O'Hare Intl to Ontario flight route?

Fly from Chicago O'Hare Intl to Toronto Island for the best Chicago O'Hare Intl - Ontario flight prices

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Ontario?

You are more likely to see cheaper flights to Region of Ontario from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $334 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from Chicago O'Hare Intl Airport for as low as $272 on momondo.

What cabin class options are available on Chicago O'Hare Intl Airport to Region of Ontario flights?

There are 4 cabin classes available to choose from on Chicago O'Hare Intl Airport to Region of Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago O'Hare Intl Airport to Region of Ontario flights?

No. A direct flight is the cheapest option for a flight between Chicago O'Hare Intl Airport to Region of Ontario.

Cheap Chicago O'Hare Intl Airport to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Region of Ontario

Best Price Found

$111

Fastest flight time

1h 37m

Direct flights

Every day

Airports in Region of Ontario

125 airports
The best one-way flight to Region of Ontario from Chicago O'Hare Intl Airport in the past 72 hours is $111. The best round-trip flight deal from Chicago O'Hare Intl Airport to Region of Ontario found on momondo in the last 72 hours is $255.
The fastest flight from Chicago O'Hare Intl Airport to Region of Ontario takes 1h 37m
Direct flights go from Chicago O'Hare Intl Airport to Region of Ontario every day.
There are 125 airports in Region of Ontario. From Chicago O'Hare Intl Airport there are direct flights to Toronto Pearson Intl (YYZ), Toronto Island (YTZ).
Search flight deals

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Ontario

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Ontario?

    Prices for flights from Chicago O'Hare Intl Airport to Ontario were last updated today.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Ontario?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to Ontario?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago O'Hare Intl Airport to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The necessary travel and health documents for your Ontario trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Chicago O'Hare Intl Airport to Region of Ontario?

Best airlines flying from Chicago O'Hare Intl Airport to Region of Ontario

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $121Free CancellationRating
7.1
11,462 reviews
Search Air Canada flights
Qantas AirwaysPriceFrom $160Free CancellationRating
7.5
1,081 reviews
Search Qantas Airways flights
WestJetPriceFrom $170Free CancellationRating
7.2
3,430 reviews
Search WestJet flights
United AirlinesPriceFrom $222Free CancellationRating
7.4
10,101 reviews
Search United Airlines flights
American AirlinesPriceFrom $223Free CancellationRating
7.1
11,901 reviews
Search American Airlines flights
Porter AirlinesPriceFrom $238Free CancellationRating
8.0
454 reviews
Search Porter Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Ontario?

Finding the right flight to Ontario from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

Can I find flights from Chicago to Ontario with flexible booking policies on momondo?

Flights from Chicago to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Chicago to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Chicago.

I’m not ready to book a flight from Chicago to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from Chicago. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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