How long is the flight from Illinois to Region of Ontario?

Departing from Illinois to Region of Ontario will take you 1h 42m. Airlines will cover a distance of 711 km. All flights are typically direct.

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$ 88 on Porter Airlines. Other airlines that offer cheap prices include United Airlines from C$ 95 and American Airlines from C$ 111 one-way.

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.

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).

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.

C$ 80+ Flights from Illinois to Ontario

Cheap flight deals from Illinois to Ontario

Enter your travel dates to find the best prices.

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 15 December 2025.

Mon 29/126:16 p.m.ORD - YYZ

Nonstop2h 05mUnited Airlines

Thu 1/19:00 a.m.YYZ - ORD

Nonstop2h 05mUnited Airlines

Deal found 12/12C$ 388

Wed 31/128:30 p.m.ORD - YUL

1 stop4h 23mAir Canada

Tue 6/111:10 a.m.YUL - ORD

1 stop5h 00mAir Canada

Deal found 13/12C$ 416

Mon 29/125:52 p.m.ORD - YUL

Nonstop2h 25mAir Canada

Mon 2/24:45 p.m.YUL - ORD

Nonstop3h 06mAir Canada

Deal found 15/12C$ 420

Mon 29/123:55 p.m.ORD - YYZ

Nonstop1h 39mUnited Airlines

Sat 3/15:30 p.m.YYZ - ORD

Nonstop2h 20mUnited Airlines

Deal found 13/12C$ 438

Mon 29/125:30 a.m.ORD - YUL

1 stop10h 45mDelta

Mon 2/26:02 p.m.YUL - ORD

1 stop6h 54mDelta

Deal found 15/12C$ 453

Tue 30/124:15 p.m.MDW - YUL

1 stop5h 30mPorter Airlines

Mon 5/111:25 a.m.YUL - MDW

1 stop4h 55mPorter Airlines

Deal found 15/12C$ 460

Sat 27/1211:00 a.m.MDW - YUL

1 stop4h 30mPorter Airlines

Fri 2/16:45 a.m.YUL - MDW

1 stop4h 25mPorter Airlines

Deal found 13/12C$ 461

Sat 20/124:15 p.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Mon 22/129:15 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 12/12C$ 482

Mon 29/1211:00 a.m.MDW - YUL

1 stop5h 45mPorter Airlines

Mon 2/26:45 a.m.YUL - MDW

1 stop4h 25mPorter Airlines

Deal found 15/12C$ 483

Sun 21/1211:00 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Mon 22/129:15 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 12/12C$ 486

Mon 29/124:15 p.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Mon 5/12:30 p.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 13/12C$ 487

Sat 20/124:15 p.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Tue 23/122:30 p.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 12/12C$ 492

Best flights from Illinois to Ontario
Discover carefully curated flight deals from Illinois to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 15 December 2025.

Tue 20/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Tue 27/19:20 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 13/12C$ 267

Sat 14/211:50 a.m.ORD - YUL

Nonstop2h 19mAmerican Airlines

Sat 21/27:12 a.m.YUL - ORD

1 stop17h 58mAmerican Airlines

Deal found 15/12C$ 280

Thu 5/21:13 p.m.ORD - YYZ

Nonstop1h 49mUnited Airlines

Mon 9/211:00 a.m.YYZ - ORD

Nonstop2h 08mUnited Airlines

Deal found 14/12C$ 286

Fri 13/21:28 p.m.MDW - YYZ

1 stop4h 41mDelta

Sun 22/212:11 p.m.YYZ - MDW

1 stop6h 26mDelta

Deal found 13/12C$ 321

Tue 27/17:15 a.m.ORD - YTZ

1 stop6h 40mAir Canada

Tue 3/210:45 a.m.YTZ - ORD

1 stop5h 10mAir Canada

Deal found 13/12C$ 329

Sun 11/19:46 p.m.STL - YYZ

1 stop31h 34mMultiple Airlines

Fri 16/17:10 a.m.YYZ - STL

1 stop16h 24mMultiple Airlines

Deal found 12/12C$ 337

Fri 30/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sat 31/111:00 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 14/12C$ 274

Mon 26/11:13 p.m.ORD - YYZ

Nonstop1h 49mUnited Airlines

Mon 2/29:00 p.m.YYZ - ORD

Nonstop2h 05mUnited Airlines

Deal found 13/12C$ 291

Tue 13/12:50 p.m.STL - YYZ

1 stop23h 45mAlaska Airlines

Tue 20/14:45 p.m.YYZ - STL

1 stop22h 09mAlaska Airlines

Deal found 15/12C$ 617

Fri 30/19:15 p.m.ORD - YYZ

Nonstop1h 44mUnited Airlines

Mon 2/29:00 p.m.YYZ - ORD

Nonstop2h 05mUnited Airlines

Deal found 13/12C$ 291

Tue 10/29:53 a.m.MDW - YYZ

1 stop5h 06mDelta

Fri 13/210:05 a.m.YYZ - MDW

1 stop8h 32mDelta

Deal found 13/12C$ 322

Sun 8/211:00 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sat 14/211:00 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 14/12C$ 295

Wed 14/17:20 a.m.ORD - YOW

1 stop9h 05mMultiple Airlines

Thu 15/17:00 a.m.YOW - ORD

1 stop14h 57mMultiple Airlines

Deal found 15/12C$ 344

Mon 2/27:15 a.m.ORD - YTZ

1 stop6h 10mAir Canada

Wed 4/29:30 a.m.YTZ - ORD

1 stop6h 25mAir Canada

Deal found 14/12C$ 350

Thu 5/29:53 a.m.MDW - YYZ

1 stop5h 06mDelta

Mon 9/212:12 p.m.YYZ - MDW

1 stop6h 43mDelta

Deal found 13/12C$ 322

Thu 29/16:05 a.m.ORD - YYZ

1 stop4h 43mUnited Airlines

Sun 1/29:00 p.m.YYZ - ORD

Nonstop2h 05mUnited Airlines

Deal found 14/12C$ 303

Wed 4/211:00 a.m.MDW - YUL

1 stop5h 45mPorter Airlines

Mon 9/26:45 a.m.YUL - MDW

1 stop4h 25mPorter Airlines

Deal found 13/12C$ 317

Mon 16/21:26 p.m.MDW - YYZ

1 stop8h 14mDelta

Thu 26/212:11 p.m.YYZ - MDW

1 stop6h 26mDelta

Deal found 14/12C$ 322

Fri 9/17:21 p.m.ORD - YOW

1 stop18h 37mMultiple Airlines

Mon 19/17:15 p.m.YOW - ORD

2 stops19h 42mMultiple Airlines

Deal found 15/12C$ 361

Thu 15/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sun 18/19:15 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 14/12C$ 317

Thu 5/29:33 a.m.MDW - YYZ

1 stop5h 39mDelta

Sun 8/26:00 a.m.YYZ - MDW

1 stop7h 46mDelta

Deal found 13/12C$ 322

Wed 14/17:21 p.m.ORD - YOW

1 stop18h 37mMultiple Airlines

Wed 21/17:00 a.m.YOW - ORD

1 stop15h 03mMultiple Airlines

Deal found 15/12C$ 368

Thu 5/21:55 p.m.ORD - YTZ

1 stop6h 43mAir Canada

Mon 9/212:30 p.m.YTZ - ORD

1 stop7h 25mAir Canada

Deal found 13/12C$ 405

Fri 24/48:00 a.m.ORD - YUL

Nonstop2h 15mAmerican Airlines

Mon 27/412:30 p.m.YUL - ORD

Nonstop2h 35mAmerican Airlines

Deal found 14/12C$ 465

Sat 14/21:28 p.m.MDW - YUL

1 stop8h 42mDelta

Sat 21/27:00 a.m.YUL - MDW

1 stop9h 21mDelta

Deal found 13/12C$ 325

Thu 29/17:15 a.m.ORD - YTZ

1 stop6h 40mMultiple Airlines

Thu 5/27:35 a.m.YTZ - ORD

3 stops27h 08mMultiple Airlines

Deal found 15/12C$ 369

Fri 16/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sun 18/19:15 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 13/12C$ 348

Thu 12/26:45 a.m.ORD - YUL

1 stop9h 08mDelta

Tue 17/26:00 a.m.YUL - ORD

1 stop8h 22mDelta

Deal found 12/12C$ 325

Sat 14/26:35 p.m.STL - YYZ

1 stop15h 21mAmerican Airlines

Sat 21/211:38 a.m.YYZ - STL

1 stop7h 24mAmerican Airlines

Deal found 12/12C$ 483

Sun 11/18:43 p.m.ORD - YOW

1 stop19h 42mMultiple Airlines

Sun 18/17:00 a.m.YOW - ORD

1 stop14h 57mMultiple Airlines

Deal found 14/12C$ 377

Direct flights from Illinois to Ontario
Explore direct flight options from Illinois to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 15 December 2025.

Wed 28/110:00 a.m.ORD - YYZ

Nonstop1h 40mAir Canada

Wed 4/22:15 p.m.YYZ - ORD

Nonstop1h 55mAir Canada

Deal found 14/12C$ 253

Thu 19/28:14 a.m.ORD - YYZ

Nonstop1h 42mAmerican Airlines

Sun 22/26:29 p.m.YYZ - ORD

Nonstop2h 00mAmerican Airlines

Deal found 14/12C$ 255

Thu 29/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sun 1/29:15 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 14/12C$ 263

Tue 20/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Tue 27/19:20 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 13/12C$ 267

Fri 30/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sat 31/111:00 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 14/12C$ 274

Sat 7/212:50 p.m.ORD - YUL

Nonstop2h 11mAir Canada

Sun 8/26:00 a.m.YUL - ORD

Nonstop3h 05mAir Canada

Deal found 13/12C$ 275

Wed 28/111:00 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sat 31/111:00 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 13/12C$ 278

Mon 2/22:00 p.m.ORD - YYZ

Nonstop1h 39mAir Canada

Mon 9/26:45 p.m.YYZ - ORD

Nonstop2h 00mAir Canada

Deal found 15/12C$ 285

Thu 5/24:50 p.m.ORD - YYZ

Nonstop1h 55mUnited Airlines

Sun 8/23:30 p.m.YYZ - ORD

Nonstop2h 10mUnited Airlines

Deal found 15/12C$ 286

Thu 29/111:15 a.m.ORD - YYZ

Nonstop1h 46mUnited Airlines

Sun 1/29:00 p.m.YYZ - ORD

Nonstop2h 05mUnited Airlines

Deal found 14/12C$ 291

Tue 20/18:00 a.m.ORD - YYZ

Nonstop1h 40mAir Canada

Tue 27/16:45 p.m.YYZ - ORD

Nonstop2h 00mAir Canada

Deal found 15/12C$ 293

Sun 8/211:00 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sat 14/211:00 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 14/12C$ 295

Last-minute flights from Illinois to Ontario
Discover last-minute flight deals from Illinois to Ontario. Data last updated 15 December 2025 and is based on user searches.

Tue 20/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Tue 27/19:20 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 13/12C$ 267

Tue 20/15:32 p.m.ORD - YYZ

1 stop28h 48mMultiple Airlines

Tue 27/17:10 a.m.YYZ - ORD

1 stop15h 54mMultiple Airlines

Deal found 13/12C$ 286

Fri 23/17:00 a.m.ORD - YYZ

1 stop15h 54mMultiple Airlines

Sun 25/112:15 p.m.YYZ - ORD

3 stops33h 48mMultiple Airlines

Deal found 14/12C$ 262

Tue 27/17:15 a.m.ORD - YYZ

1 stop5h 25mAir Canada

Tue 3/26:45 p.m.YYZ - ORD

Nonstop2h 00mAir Canada

Deal found 13/12C$ 260

Tue 27/17:20 a.m.ORD - YYZ

1 stop15h 00mMultiple Airlines

Fri 30/17:35 a.m.YYZ - ORD

1 stop15h 29mMultiple Airlines

Deal found 14/12C$ 285

Wed 28/110:00 a.m.ORD - YYZ

Nonstop1h 40mAir Canada

Wed 4/22:15 p.m.YYZ - ORD

Nonstop1h 55mAir Canada

Deal found 14/12C$ 253

Wed 28/111:00 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sat 31/111:00 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 13/12C$ 278

Thu 29/18:00 a.m.ORD - YYZ

Nonstop1h 40mAir Canada

Thu 5/24:50 p.m.YYZ - ORD

Nonstop1h 58mAir Canada

Deal found 15/12C$ 255

Thu 29/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sun 1/29:15 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 14/12C$ 263

Thu 29/18:43 p.m.ORD - YYZ

1 stop16h 57mMultiple Airlines

Thu 5/24:50 p.m.YYZ - ORD

Nonstop1h 58mMultiple Airlines

Deal found 15/12C$ 274

Thu 29/18:43 p.m.ORD - YYZ

1 stop16h 57mMultiple Airlines

Sun 1/212:15 p.m.YYZ - ORD

3 stops32h 23mMultiple Airlines

Deal found 14/12C$ 282

Fri 30/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Sat 31/111:00 a.m.YTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 14/12C$ 274

One-way flights from Illinois to Ontario
Search for one-way flight options from Illinois to Ontario. Find affordable one-way fares based on user searches. Data last updated 15 December 2025.

Sun 15/211:05 a.m.MDW - YUL

1 stop4h 25mPorter Airlines

Deal found 14/12C$ 80

Sat 14/23:35 p.m.ORD - YUL

Nonstop2h 05mAir Canada

Deal found 15/12C$ 88

Thu 19/211:05 a.m.MDW - YUL

1 stop5h 40mPorter Airlines

Deal found 13/12C$ 90

Thu 19/26:40 a.m.ORD - YUL

1 stop7h 44mAmerican Airlines

Deal found 15/12C$ 106

Wed 28/18:10 a.m.ORD - YYZ

2 stops14h 10mMultiple Airlines

Deal found 15/12C$ 112

Wed 21/17:20 a.m.ORD - YYZ

1 stop15h 00mMultiple Airlines

Deal found 14/12C$ 113

Sun 18/15:11 p.m.STL - YYZ

1 stop20h 09mMultiple Airlines

Deal found 14/12C$ 116

Sun 15/25:00 a.m.ORD - YYZ

1 stop5h 13mAmerican Airlines

Deal found 14/12C$ 118

Tue 27/111:00 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Deal found 13/12C$ 120

Sat 24/110:00 a.m.ORD - YYZ

Nonstop1h 40mAir Canada

Deal found 15/12C$ 120

Mon 26/111:05 a.m.MDW - YTZ

Nonstop1h 42mPorter Airlines

Deal found 13/12C$ 121

Wed 11/25:30 a.m.ORD - YUL

1 stop10h 25mDelta

Deal found 15/12C$ 123

Find flight deals from Illinois to Ontario

Round-trip from	C$ 253
One-way from	C$ 80
Popular in	January
Cheapest in	September
Average price	C$ 414
Good round-trip deal	C$ 280 or less
Good one-way deal	C$ 162 or less

Air Canada
28/1-4/2
Nonstop
3h 35m total
Illinois to Ontario

Search Deals

Porter Airlines
15/2
1 total stop
4h 25m total
Illinois to Ontario

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (C$ 68 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

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

Fly from

Fly to

Route

Depart

Return

Price

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Tue 20/1

11:05 a.m.-1:47 p.m.

Nonstop1h 42m

Toronto Island

Tue 27/1

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

Nonstop1h 50m

C$ 267

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 30/1

11:05 a.m.-1:47 p.m.

Nonstop1h 42m

Toronto Island

Sat 31/1

11:00 a.m.-11:50 a.m.

Nonstop1h 50m

C$ 274

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Sat 14/2

11:50 a.m.-3:09 p.m.

Nonstop2h 19m

Montreal Pierre Elliott Trudeau Intl

Sat 21/2

7:12 a.m.-12:10 a.m.

1 stop17h 58m

C$ 280

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 5/2

1:13 p.m.-4:02 p.m.

Nonstop1h 49m

Toronto Pearson Intl

Mon 9/2

11:00 a.m.-12:08 p.m.

Nonstop2h 08m

C$ 286

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Mon 26/1

1:13 p.m.-4:02 p.m.

Nonstop1h 49m

Toronto Pearson Intl

Mon 2/2

9:00 p.m.-10:05 p.m.

Nonstop2h 05m

C$ 291

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 30/1

9:15 p.m.-11:59 p.m.

Nonstop1h 44m

Toronto Pearson Intl

Mon 2/2

9:00 p.m.-10:05 p.m.

Nonstop2h 05m

C$ 291

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sun 8/2

11:00 a.m.-1:42 p.m.

Nonstop1h 42m

Toronto Island

Sat 14/2

11:00 a.m.-11:50 a.m.

Nonstop1h 50m

C$ 295

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 29/1

6:05 a.m.-11:48 a.m.

1 stop4h 43m

Toronto Pearson Intl

Sun 1/2

9:00 p.m.-10:05 p.m.

Nonstop2h 05m

C$ 303

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Wed 4/2

11:00 a.m.-5:45 p.m.

1 stop5h 45m

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

6:45 a.m.-10:10 a.m.

1 stop4h 25m

C$ 317

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 15/1

11:05 a.m.-1:47 p.m.

Nonstop1h 42m

Toronto Island

Sun 18/1

9:15 a.m.-10:05 a.m.

Nonstop1h 50m

C$ 317

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/12

Showing 1-10 of 60 results

...

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.

Cheapflights Insights

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

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

Currently, March is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of C$ 109). Flying from Illinois to Region of Ontario in December is currently the most expensive (average of C$ 291). 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?

It’s optimal to fly from Illinois to Region of Ontario in the evening. By choosing this option you can save up to 55% on the cost of your flight, compared to a flight in the morning.

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

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

Weekly flight availability from Illinois to Region of Ontario

The most flights from USIL to CAON are scheduled on a Monday (64 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (19 on average).

Reviews of airlines servicing Ontario

Check out reviews from past customers who have flown with Porter Airlines,United Airlines, andAmerican Airlines from Illinois to Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

399 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Porter Airlines

8.0

Very good

399 reviews

Porter Airlines

8.0

Very good

399 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

United Airlines

7.4

Good

9,092 reviews

Porter Airlines

8.0

Very good

399 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

American Airlines

7.2

Good

11,051 reviews

Porter Airlines

8.0

Very good

399 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Air Canada

7.1

Good

10,525 reviews

Porter Airlines

8.0

Very good

399 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Related info for your journey

How long is the flight from Illinois to Region of Ontario?
Departing from Illinois to Region of Ontario will take you 1h 42m. Airlines will cover a distance of 711 km. All flights are typically direct.
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$ 88 on Porter Airlines. Other airlines that offer cheap prices include United Airlines from C$ 95 and American Airlines from C$ 111 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, March is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of C$ 109). Flying from Illinois to Region of Ontario in December is currently the most expensive (average of C$ 291). 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

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O'Hare Intl to Vancouver Intl flights

San Francisco to Pearson Intl flights

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Direct flights to Canada

Find a return flight route from Ontario

Illinois to Ontario flights

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Top 3 airlines flying from Illinois to Ontario

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	CheapestC$ 150	AverageC$ 463	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	CheapestC$ 203	AverageC$ 355	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 259	AverageC$ 354	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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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.

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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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Cheap flights from Illinois to Ontario from C$ 80

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 15/2. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Illinois to Ontario

Cheapest flights from Illinois to OntarioExplore 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 15 December 2025.

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 15 December 2025.

Find flight deals from Illinois to Ontario

Keep the following information in mind while searching for Illinois to Ontario flight deals. Data was last updated 15 December 2025.

Round-trip from

One-way from

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Average price

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

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.

Cheapflights Insights

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

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

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 15 December 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Illinois to Ontario. Price data was last updated on 16 December 2024.

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 15 December 2025.

Reviews of airlines servicing Ontario

Check out reviews from past customers who have flown with Porter Airlines,United Airlines, andAmerican Airlines from Illinois to Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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.

How long is the flight from Illinois to Region of Ontario?

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

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

How can I find direct flights from Illinois to Ontario?

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

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

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Alternative routes for Illinois to Ontario

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Top 3 airlines flying from Illinois to Ontario

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

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

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

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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 15 December 2025.