Find flights
Deals
When to book
FAQs

Cheap flights from Ontario to Chicago from C$ 217

YYZ — CHI
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Chicago

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Chicago

Sat 14/117:44 p.m. -
1 stop5h 17m
Sun 15/117:03 a.m. -
Nonstop1h 44m
Deal found 31/10C$ 333
Fri 13/117:26 p.m. -
Nonstop2h 22m
Sat 14/117:45 a.m. -
1 stop15h 07m
Deal found 30/10C$ 347
Tue 15/1212:55 p.m. -
1 stop6h 46m
Tue 15/129:21 p.m. -
Nonstop1h 38m
Deal found 3/11C$ 362
Thu 19/114:35 p.m. -
Nonstop2h 05m
Sun 22/116:20 p.m. -
Nonstop1h 45m
Deal found 1/11C$ 376
Fri 20/1110:29 a.m. -
Nonstop2h 05m
Sun 22/116:20 p.m. -
Nonstop1h 45m
Deal found 30/10C$ 378
Wed 16/126:55 p.m. -
Nonstop2h 03m
Wed 23/128:50 p.m. -
Nonstop1h 42m
Deal found 1/11C$ 386
Sat 14/114:35 p.m. -
Nonstop2h 05m
Mon 16/1112:15 p.m. -
Nonstop1h 45m
Deal found 31/10C$ 386
Sun 27/128:05 a.m. -
Nonstop2h 03m
Fri 1/18:55 p.m. -
Nonstop1h 42m
Deal found 1/11C$ 387
Fri 27/1110:29 a.m. -
Nonstop2h 05m
Mon 30/116:20 p.m. -
Nonstop1h 45m
Deal found 1/11C$ 387
Fri 13/114:35 p.m. -
Nonstop2h 05m
Sun 15/116:20 p.m. -
Nonstop1h 45m
Deal found 30/10C$ 389
Fri 13/112:35 p.m. -
Nonstop2h 03m
Sun 15/1110:15 a.m. -
Nonstop1h 37m
Deal found 30/10C$ 390
Sat 14/1110:29 a.m. -
Nonstop2h 05m
Sun 15/1112:15 p.m. -
Nonstop1h 45m
Deal found 31/10C$ 390

Find flight deals from Ontario to Chicago

Round-trip from

C$ 333

One-way from

C$ 217

Popular in

October

Cheapest in

February

Average price

C$ 403

Good round-trip deal

C$ 386 or less

Good one-way deal

C$ 257 or less
Lufthansa
  • Lufthansa
  • 14/11-15/11
  • 1 total stop
  • 7h 01m total
  • Ontario to Chicago
Search Deals
British Airways
  • British Airways
  • 9/11-31/12
  • Nonstop
  • 2h 30m total
  • Ontario to Chicago
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from Ontario to Chicago (CHI).
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ontario to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Sun 22/11

10:29 a.m.-11:34 a.m.

Nonstop2h 05m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 238

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Fri 4/12

10:29 a.m.-11:34 a.m.

Nonstop2h 05m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 246

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Tue 1/12

10:45 a.m.-3:02 p.m.

1 stop5h 17m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 249
Quickest round-trip

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Sun 17/1

4:35 p.m.-5:30 p.m.

Nonstop1h 55m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 249

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Mon 11/1

4:35 p.m.-5:30 p.m.

Nonstop1h 55m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 257

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Mon 21/12

6:45 a.m.-7:57 a.m.

Nonstop2h 12m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 259

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Sat 9/1

10:45 a.m.-2:52 p.m.

1 stop5h 07m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 260

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Sun 10/1

10:35 a.m.-11:30 a.m.

Nonstop1h 55m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 269

TorontoChicago

YYZ Toronto Pearson Intl - MDW Chicago Midway

YYZMDW

Toronto Pearson Intl

Sat 5/12

12:15 p.m.-6:01 p.m.

1 stop6h 46m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 270

TorontoChicago

YYZ Toronto Pearson Intl - MDW Chicago Midway

YYZMDW

Toronto Pearson Intl

Fri 4/12

2:25 p.m.-6:01 p.m.

1 stop4h 36m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 270

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/11

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Ontario to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Ontario with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Ontario to Chicago

What is the cheapest month to book a flight from Region of Ontario to Chicago?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Chicago (average of C$ 378). Flying from Region of Ontario to Chicago in October is currently the most expensive (average of C$ 478). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to CHI?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 22% on flights from Region of Ontario to Chicago by exploring options for tickets at noon.

Weekly flight availability from Region of Ontario to Chicago

The most flights from CAON to CHI are scheduled on a Monday (62 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (48 on average).

How much does it cost to fly round-trip from Region of Ontario to Chicago?

Airfare is below average for this route at the moment.
Region of Ontario to Chicago flights typically cost between C$ 379 and C$ 569 in November.
The cheapest round-trip price found within the last 5 days was C$ 333 on Lufthansa (14 Nov-15 Nov).

How far ahead should I book a flight from Region of Ontario to Chicago?

The best time to book flights from Region of Ontario to Chicago is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest day to fly from Region of Ontario to Chicago?

Travelers seeking maximum savings on their Region of Ontario to Chicago flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

  • How long is the flight from Region of Ontario to Chicago?

    For as low as C$ 404, Porter Airlines can have you in Chicago from Region of Ontario in 2h 05m. Region of Ontario and Chicago are separated by a distance of 716 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Region of Ontario to Chicago one-way?

    The cheapest airline one-way is Porter Airlines, with whom users have recently found tickets for as low as C$ 152. However, be on the lookout for offers from United Airlines and Air Canada, as they are both options that can get you from Region of Ontario to Chicago for a low price.

  • What are the most popular routes from Region of Ontario to Chicago?

    When deciding which route to take from Region of Ontario to Chicago consider Toronto Pearson Intl - Chicago O'Hare Intl, Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl or Toronto Pearson Intl - Chicago Midway as they are the most popular.

  • What are the most reliable airlines from Region of Ontario to Chicago?

    No one likes to see their flight delayed. When booking a flight from Region of Ontario to Chicago consider choosing Sun Country Air (100%), Royal Jordanian (91%) or Copa Airlines (88%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Region of Ontario to Chicago?

    On average you can expect to pay C$ 1,382 for a flight from Region of Ontario to Chicago. The cheapest flight overall is C$ 279 while the most popular route, (Toronto Pearson Intl - Chicago O'Hare Intl) is currently priced at C$ 431.

  • Can I find deals for flights from Ontario to Chicago that include hotel bookings?

    Yes. In addition to deals on Ontario to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Chicago.

  • Can I find deals for business class flights from Ontario to Chicago?

    Yes. Cheapflights offers flight deals from Ontario to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to Chicago?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Chicago (average of C$ 378). Flying from Region of Ontario to Chicago in October is currently the most expensive (average of C$ 478). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to Chicago

Pearson Intl to O'Hare Intl flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Toronto Island to O'Hare Intl flights
Pearson Intl to Midway flights
Vancouver Intl to O'Hare Intl flights
Pierre Elliott Trudeau Intl to Midway flights
Calgary to O'Hare Intl flights
Toronto Island to Midway flights
Hamilton to O'Hare Intl flights
Pearson Intl to St. Louis flights
Québec City to O'Hare Intl flights
Winnipeg to O'Hare Intl flights
Ottawa to O'Hare Intl flights
Vancouver Intl to Midway flights
Edmonton to O'Hare Intl flights
Calgary to Midway flights
Halifax to O'Hare Intl flights
Halifax to Midway flights
Edmonton to Midway flights
Pierre Elliott Trudeau Intl to St. Louis flights
Ottawa to Midway flights
Québec City to Midway flights
Victoria to O'Hare Intl flights
Edmonton to St. Louis flights
Calgary to St. Louis flights
Kelowna to Midway flights
Kelowna to O'Hare Intl flights
St. John's to O'Hare Intl flights
Vancouver Intl to St. Louis flights
Pearson Intl to Moline flights
Moncton to O'Hare Intl flights
Ottawa to St. Louis flights
London to O'Hare Intl flights
Nanaimo to O'Hare Intl flights
Pearson Intl to Peoria flights
Victoria to St. Louis flights
Vancouver Intl to Peoria flights
Regina to O'Hare Intl flights
Saskatoon to O'Hare Intl flights
St John to O'Hare Intl flights
Victoria to Midway flights
Region of Waterloo Intl to O'Hare Intl flights
Saskatoon to St. Louis flights
Comox to O'Hare Intl flights
Deer Lake to O'Hare Intl flights
Fort McMurray to O'Hare Intl flights
Sudbury to O'Hare Intl flights

Top 5 airlines flying from Ontario to Chicago

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 135AverageC$ 625FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 250AverageC$ 429FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 263AverageC$ 474FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 299AverageC$ 423FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 387AverageC$ 477FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to Chicago?

When you search for this flight from Ontario to Chicago, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Chicago?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Chicago from Ontario.

Can Cheapflights find flights from Ontario to Chicago with no change fees?

Certainly. Search results for flights to Chicago from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Ontario to Chicago become cheaper?

Not ready to book yet? You can track prices for flights from Ontario to Chicago on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.