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Cheap flights from Illinois to Ontario from C$ 151

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
26 Jan — 2 Feb1
1 adult

Cheap flight deals from Illinois to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to Ontario (CAON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 January 2025.

Round-trip from

C$ 284

One-way from

C$ 151

Good round-trip deal

C$ 435 or less

Good one-way deal

C$ 237 or less
Porter Airlines
  • Porter Airlines
  • 13/2-16/2
  • Nonstop
  • 3h 32m total
  • Illinois to Ontario
Search Deals
4/2
  • 4/2
  • 2 total stops
  • 29h 55m total
  • Illinois to Ontario
Search Deals
Price to beat on a round-trip flight from Illinois to Ontario.
Search Deals
Price to beat on a one-way flight from Illinois to Ontario.
Search Deals

Find flight deals from Illinois to Ontario

Cheapest flights from Illinois to Ontario
Explore the most affordable flight options available from Illinois to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.

Thu 13/21:05 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sun 16/211:20 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 20/1C$ 284
Thu 13/21:05 p.m.MDW - YTZ
Nonstop1h 42mMultiple Airlines
Sun 16/211:20 a.m.YTZ - MDW
Nonstop1h 50mMultiple Airlines
Deal found 21/1C$ 314
Sat 22/312:55 p.m.MDW - YTZ
Nonstop1h 42mAir Transat
Wed 26/39:30 a.m.YTZ - MDW
Nonstop1h 50mAir Transat
Deal found 20/1C$ 345
Fri 28/21:05 p.m.MDW - YUL
1 stop5h 20mPorter Airlines
Sun 2/36:50 a.m.YUL - MDW
1 stop4h 30mPorter Airlines
Deal found 20/1C$ 355
Tue 25/27:10 a.m.ORD - YUL
1 stop9h 25mMultiple Airlines
Tue 11/36:35 p.m.YUL - ORD
1 stop15h 54mMultiple Airlines
Deal found 20/1C$ 371
Wed 5/310:25 a.m.ORD - YYZ
1 stop12h 30mMultiple Airlines
Wed 12/312:25 p.m.YYZ - ORD
1 stop12h 42mMultiple Airlines
Deal found 20/1C$ 371
Tue 18/311:35 a.m.ORD - YTZ
1 stop5h 15mAir Canada
Wed 19/38:50 a.m.YTZ - ORD
1 stop5h 06mAir Canada
Deal found 21/1C$ 376
Tue 4/35:00 a.m.ORD - YTZ
2 stops16h 23mMultiple Airlines
Tue 11/32:00 p.m.YTZ - ORD
2 stops20h 29mMultiple Airlines
Deal found 20/1C$ 389
Tue 18/32:05 p.m.ORD - YYZ
Nonstop1h 41mAir Canada
Wed 19/32:00 p.m.YYZ - ORD
Nonstop1h 51mAir Canada
Deal found 21/1C$ 404
Wed 5/310:25 a.m.ORD - YOW
1 stop8h 50mMultiple Airlines
Wed 12/34:20 p.m.YOW - ORD
1 stop8h 47mMultiple Airlines
Deal found 21/1C$ 426
Fri 14/21:25 p.m.ORD - YYZ
Nonstop1h 35mAmerican Airlines
Mon 17/24:44 p.m.YYZ - ORD
Nonstop2h 00mAmerican Airlines
Deal found 20/1C$ 427
Thu 6/39:50 a.m.ORD - YYZ
Nonstop1h 40mBritish Airways
Mon 10/36:15 p.m.YYZ - ORD
1 stop5h 32mBritish Airways
Deal found 21/1C$ 429

Find flights from Illinois to Ontario within your budget

Customize your flight search to find flights from Illinois to 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, Cheapflights users made 629,999 searches. Data last updated 21 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 13/2

1:05 p.m.-3:47 p.m.

Nonstop1h 42m

Toronto Island

Sun 16/2

11:20 a.m.-12:10 p.m.

Nonstop1h 50m

C$ 284

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 6/3

11:15 a.m.-1:57 p.m.

Nonstop1h 42m

Toronto Island

Thu 13/3

3:50 p.m.-4:40 p.m.

Nonstop1h 50m

C$ 305

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sat 22/3

12:55 p.m.-3:37 p.m.

Nonstop1h 42m

Toronto Island

Wed 26/3

9:30 a.m.-10:20 a.m.

Nonstop1h 50m

C$ 345

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Fri 28/2

1:05 p.m.-7:25 p.m.

1 stop5h 20m

Montreal Pierre Elliott Trudeau Intl

Sun 2/3

6:50 a.m.-10:20 a.m.

1 stop4h 30m

C$ 355

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Tue 25/2

7:10 a.m.-5:35 p.m.

1 stop9h 25m

Montreal Pierre Elliott Trudeau Intl

Tue 11/3

6:35 p.m.-9:29 a.m.

1 stop15h 54m

C$ 371

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 5/3

10:25 a.m.-11:55 p.m.

1 stop12h 30m

Toronto Pearson Intl

Wed 12/3

12:25 p.m.-12:07 a.m.

1 stop12h 42m

C$ 371

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Tue 18/3

11:35 a.m.-5:50 p.m.

1 stop5h 15m

Toronto Island

Wed 19/3

8:50 a.m.-12:56 p.m.

1 stop5h 06m

C$ 376

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Tue 4/3

5:00 a.m.-10:23 p.m.

2 stops16h 23m

Toronto Island

Tue 11/3

2:00 p.m.-9:29 a.m.

2 stops20h 29m

C$ 389

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 18/3

2:05 p.m.-4:46 p.m.

Nonstop1h 41m

Toronto Pearson Intl

Wed 19/3

2:00 p.m.-2:51 p.m.

Nonstop1h 51m

C$ 404

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Wed 5/3

10:25 a.m.-8:15 p.m.

1 stop8h 50m

Ottawa

Wed 12/3

4:20 p.m.-12:07 a.m.

1 stop8h 47m

C$ 426

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/1

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Illinois to Ontario

Get recent, data-driven insights about flights from Illinois to Ontario including ideal travel times, pricing trends, and more.

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of C$ 168). Flying from Illinois to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 IL to ON?

Find hourly flight availability from Illinois to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 January 2025.

When flying from Illinois to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Illinois to Region of Ontario

Explore weekly flight availability from Illinois to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 21 January 2025.

The most flights from USIL to CAON are scheduled on a Monday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (32 on average).

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 21 January 2025.
Read through reviews of airlines operating flights from Illinois to Ontario, such as American Airlines, United Airlines and WestJet. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines
8.0
Very good
9,706 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta
8.0
Very good
8,521 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Porter Airlines
7.9
Good
277 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

KLM
7.8
Good
1,341 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Air Transat
7.8
Good
381 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Illinois to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    One-way options have recently been found by users for as low as C$ 160 on Porter Airlines. Other airlines that offer cheap prices include American Airlines from C$ 178 and Air Canada from C$ 183 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Ontario 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 Illinois to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of C$ 168). Flying from Illinois to Region of Ontario in July is currently the most expensive (average of C$ 258). 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

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Alternative routes for Illinois to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Pearson Intl flights
John F Kennedy Intl to Pearson Intl flights
Newark to Toronto Island flights
John F Kennedy Intl to Vancouver Intl flights
Newark to Vancouver Intl flights
Newark to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
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LaGuardia to Pearson Intl flights
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O'Hare Intl to Vancouver Intl flights
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San Francisco to Pearson Intl flights
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Seattle to Pearson Intl flights
O'Hare Intl to Pearson Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
Minneapolis to Vancouver Intl flights
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Dulles Intl to Pearson Intl flights
Boston to Toronto Island flights
San Diego to Vancouver Intl flights
Seattle to Vancouver Intl flights
Dallas/Fort Worth to Vancouver Intl flights
San Francisco to Calgary flights
Atlanta to Pearson Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Pierre Elliott Trudeau Intl flights
Santa Ana to Vancouver Intl flights
Hobby to Vancouver Intl flights
Newark to Québec City flights
Boston to Vancouver Intl flights
Sacramento to Vancouver Intl flights
Reagan-National to Pearson Intl flights
Atlanta to Calgary flights
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George Bush Intcntl to Vancouver Intl flights

Top 3 airlines flying from Illinois to Ontario

Discover the top 3 airlines that operate flights from Illinois to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 21 January 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 189AverageC$ 498FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 196AverageC$ 506FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 314AverageC$ 438FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario from Illinois today with Cheapflights!

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

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 Ontario from Illinois.

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

Yes! Cheapflights helps users easily find flights from Illinois to Ontario with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ontario from Illinois today and book when prices fit your budget.

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