What is the cheapest airline that flies from Illinois to Ontario?

Air Transat, Porter Airlines, and Delta are the most popular carriers operating from Illinois to Ontario

Which airlines fly to Region of Ontario?

United Airlines, Air Canada and American Airlines are the top three most popular airlines that fly to Region of Ontario from Illinois according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when travelling to Region of Ontario. Keep in mind that there are 3 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

How many flights depart from Illinois to Region of Ontario on average per week?

As of September 2026, there are 578 flights per week flying from Illinois to Region of Ontario. The most common day of the week flights depart is Fri, with 15% of flights taking off on this day.

How many flights depart from Illinois to Region of Ontario on average per day?

As of September 2026, there are 82 flights per day flying from Illinois to Region of Ontario. The most common time of day flights depart is 10:00a.m., with 41% of flights taking off at noon.

When did momondo last update prices for flights from Illinois to Ontario?

Prices for flights from Illinois to Ontario are updated daily.

How many operators does momondo search for flights from Illinois to Ontario?

There are 3 operators available for flights from Illinois to Ontario as of September 2026.

How old do you have to be to fly from Illinois to Ontario?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Ontario.

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

The travel and health documents required for your trip to Ontario can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

C$ 136 Cheap Flights from Illinois to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:20 p.m. - 3:06 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 46mdirect

4:35 p.m. - 5:40 p.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mdirect

C$ 303Porter Airlines

Sat, 7 Nov - Sat, 14 Nov

3:20 p.m. - 6:00 p.m.MDW Chicago Midway-YTZ Toronto Island

1h 40mdirect

10:10 a.m. - 11:00 a.m.YTZ Toronto Island-MDW Chicago Midway

1h 50mdirect

C$ 308Porter Airlines

Thu, 8 Oct - Sun, 11 Oct

6:20 p.m. - 9:06 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 46mdirect

10:35 a.m. - 11:40 a.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mdirect

C$ 310Porter Airlines

Wed, 4 Nov - Sat, 7 Nov

2:00 p.m. - 4:48 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 48mdirect

12:05 p.m. - 1:20 p.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 15mdirect

C$ 324Air Canada

Fri, 23 Oct - Fri, 30 Oct

2:00 p.m. - 4:48 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 48mdirect

10:45 a.m. - 2:52 p.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

5h 07m1 stop Montreal Pierre Elliott Trudeau Intl

C$ 344Air Canada

Wed, 21 Oct - Wed, 28 Oct

2:00 p.m. - 4:48 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 48mdirect

12:05 p.m. - 1:20 p.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 15mdirect

C$ 356Air Canada

Wed, 21 Oct - Wed, 28 Oct

8:30 p.m. - 11:29 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 59mdirect

11:40 a.m. - 12:45 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mdirect

C$ 625American Airlines

Fri, 9 Oct - Sun, 11 Oct

2:50 p.m. - 5:44 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 54mdirect

6:21 p.m. - 7:41 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 20mdirect

C$ 625American Airlines

Fri, 30 Oct - Mon, 2 Nov

7:03 a.m. - 9:47 a.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 44mdirect

12:55 p.m. - 5:17 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

5h 22m1 stop Newark

C$ 626United Airlines

Tue, 24 Nov - Tue, 24 Nov

8:50 a.m. - 2:25 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

4h 35m1 stop Washington, D.C. Dulles Intl

5:55 p.m. - 7:05 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 10mdirect

C$ 636United Airlines

Tue, 27 Oct - Tue, 27 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

8:03 a.m. - 10:59 a.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 56mdirect

8:05 a.m. - 9:00 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

1h 55mdirect

C$ 414Air Canada

Sat, 3 Oct - Sun, 4 Oct

3:45 p.m. - 6:31 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 46mdirect

8:05 a.m. - 9:00 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

1h 55mdirect

C$ 477Air Canada

Sat, 3 Oct - Sun, 4 Oct

9:45 a.m. - 12:35 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 50mdirect

12:08 p.m. - 6:26 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

7h 18m1 stop Detroit Metropolitan Wayne County

C$ 479Multiple Airlines

Sat, 3 Oct - Sun, 4 Oct

9:45 a.m. - 12:35 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 50mdirect

12:08 p.m. - 6:26 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

7h 18m1 stop Detroit Metropolitan Wayne County

C$ 481Multiple Airlines

Sat, 3 Oct - Sun, 4 Oct

8:40 p.m. - 11:26 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 46mdirect

6:00 a.m. - 12:59 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

7h 59m1 stop Detroit Metropolitan Wayne County

C$ 501Air Canada

Sat, 3 Oct - Sun, 4 Oct

9:45 a.m. - 12:35 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 50mdirect

6:30 a.m. - 7:40 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 10mdirect

C$ 509British Airways

Sat, 3 Oct - Sun, 4 Oct

2:51 p.m. - 5:44 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 53mdirect

11:39 a.m. - 12:44 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mdirect

C$ 625American Airlines

Sat, 3 Oct - Sat, 10 Oct

8:29 p.m. - 11:25 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 56mdirect

6:25 p.m. - 7:30 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mdirect

C$ 625American Airlines

Sat, 3 Oct - Mon, 5 Oct

5:53 p.m. - 8:44 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 51mdirect

3:35 p.m. - 4:44 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 09mdirect

C$ 790United Airlines

Tue, 29 Sep - Wed, 28 Oct

10:43 a.m. - 1:42 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 59mdirect

10:53 a.m. - 11:57 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 04mdirect

C$ 790United Airlines

Sat, 3 Oct - Wed, 28 Oct

Cheap direct flights

Enter your travel dates to find the best prices.

12:20 p.m. - 3:06 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 46mdirect

4:35 p.m. - 5:40 p.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mdirect

C$ 303Porter Airlines

Sat, 7 Nov - Sat, 14 Nov

3:20 p.m. - 6:00 p.m.MDW Chicago Midway-YTZ Toronto Island

1h 40mdirect

10:10 a.m. - 11:00 a.m.YTZ Toronto Island-MDW Chicago Midway

1h 50mdirect

C$ 308Porter Airlines

Thu, 8 Oct - Sun, 11 Oct

6:20 p.m. - 9:06 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 46mdirect

10:35 a.m. - 11:40 a.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mdirect

C$ 310Porter Airlines

Wed, 4 Nov - Sat, 7 Nov

2:00 p.m. - 4:48 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 48mdirect

12:05 p.m. - 1:20 p.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 15mdirect

C$ 324Air Canada

Fri, 23 Oct - Fri, 30 Oct

2:00 p.m. - 4:48 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 48mdirect

12:05 p.m. - 1:20 p.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 15mdirect

C$ 356Air Canada

Wed, 21 Oct - Wed, 28 Oct

4:30 p.m. - 7:10 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 40mdirect

6:55 p.m. - 7:58 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 03mdirect

C$ 557Air Canada

Wed, 11 Nov - Wed, 18 Nov

8:30 p.m. - 11:29 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 59mdirect

11:40 a.m. - 12:45 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mdirect

C$ 625American Airlines

Fri, 9 Oct - Sun, 11 Oct

2:50 p.m. - 5:44 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 54mdirect

6:21 p.m. - 7:41 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 20mdirect

C$ 625American Airlines

Fri, 30 Oct - Mon, 2 Nov

9:22 p.m. - 11:59 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 37mdirect

10:53 a.m. - 12:05 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 12mdirect

C$ 656United Airlines

Sat, 19 Dec - Sat, 16 Jan

4:33 p.m. - 7:37 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

2h 04mdirect

6:45 a.m. - 7:54 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 09mdirect

C$ 656United Airlines

Wed, 14 Oct - Sat, 31 Oct

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Lufthansa flights from Illinois to Region of Ontario

Our best Lufthansa deals on Illinois to Region of Ontario flight tickets

Lufthansa

8 Oct

ORD7:09 a.m.Chicago O'Hare Intl

1h 45m

YYZ9:54 a.m.Toronto Pearson Intl

11 Oct

YYZ8:50 a.m.Toronto Pearson Intl

1h 58m

ORD9:48 a.m.Chicago O'Hare Intl

C$ 370

Lufthansa

10 Oct

ORD5:53 p.m.Chicago O'Hare Intl

1h 51m

YYZ8:44 p.m.Toronto Pearson Intl

11 Oct

YYZ8:50 a.m.Toronto Pearson Intl

1h 58m

ORD9:48 a.m.Chicago O'Hare Intl

C$ 464

Lufthansa

10 Oct

ORD12:55 p.m.Chicago O'Hare Intl

5h 07m

1 stop

YYZ7:02 p.m.Toronto Pearson Intl

11 Oct

YYZ7:00 a.m.Toronto Pearson Intl

2h 00m

ORD8:00 a.m.Chicago O'Hare Intl

C$ 485

Delta flights from Illinois to Region of Ontario

Our best Delta deals on Illinois to Region of Ontario flight tickets

Delta

7 Nov

ORD8:29 a.m.Chicago O'Hare Intl

7h 50m

1 stop

YYZ5:19 p.m.Toronto Pearson Intl

14 Nov

YYZ6:00 a.m.Toronto Pearson Intl

8h 59m

1 stop

ORD1:59 p.m.Chicago O'Hare Intl

C$ 379

Delta

20 Oct

ORD11:19 a.m.Chicago O'Hare Intl

5h 00m

1 stop

YYZ5:19 p.m.Toronto Pearson Intl

24 Oct

YYZ9:40 a.m.Toronto Pearson Intl

4h 19m

1 stop

ORD12:59 p.m.Chicago O'Hare Intl

C$ 472

Delta

9 Oct

ORD5:29 p.m.Chicago O'Hare Intl

4h 27m

1 stop

YYZ10:56 p.m.Toronto Pearson Intl

11 Oct

YYZ2:26 p.m.Toronto Pearson Intl

5h 03m

1 stop

ORD6:29 p.m.Chicago O'Hare Intl

C$ 533

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoToronto

ORD Chicago O'Hare Intl - YTZ Toronto Island

ORDYTZ

Chicago O'Hare Intl

Sat 7/11

12:20 p.m.-3:06 p.m.

Nonstop1h 46m

Toronto Island

Sat 14/11

4:35 p.m.-5:40 p.m.

Nonstop2h 05m

C$ 303

Quickest round-trip

ChicagoToronto

MDW Chicago Midway - YTZ Toronto Island

MDWYTZ

Chicago Midway

Thu 8/10

3:20 p.m.-6:00 p.m.

Nonstop1h 40m

Toronto Island

Sun 11/10

10:10 a.m.-11:00 a.m.

Nonstop1h 50m

C$ 308

ChicagoToronto

ORD Chicago O'Hare Intl - YTZ Toronto Island

ORDYTZ

Chicago O'Hare Intl

Wed 4/11

6:20 p.m.-9:06 p.m.

Nonstop1h 46m

Toronto Island

Sat 7/11

10:35 a.m.-11:40 a.m.

Nonstop2h 05m

C$ 310

ChicagoToronto

ORD Chicago O'Hare Intl - YTZ Toronto Island

ORDYTZ

Chicago O'Hare Intl

Fri 23/10

2:00 p.m.-4:48 p.m.

Nonstop1h 48m

Toronto Island

Fri 30/10

12:05 p.m.-1:20 p.m.

Nonstop2h 15m

C$ 324

ChicagoToronto

ORD Chicago O'Hare Intl - YTZ Toronto Island

ORDYTZ

Chicago O'Hare Intl

Wed 21/10

2:00 p.m.-4:48 p.m.

Nonstop1h 48m

Toronto Island

Wed 28/10

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

1 stop5h 07m

C$ 344

ChicagoToronto

ORD Chicago O'Hare Intl - YTZ Toronto Island

ORDYTZ

Chicago O'Hare Intl

Wed 21/10

2:00 p.m.-4:48 p.m.

Nonstop1h 48m

Toronto Island

Wed 28/10

12:05 p.m.-1:20 p.m.

Nonstop2h 15m

C$ 356

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Fri 9/10

8:30 p.m.-11:29 p.m.

Nonstop1h 59m

Toronto Pearson Intl

Sun 11/10

11:40 a.m.-12:45 p.m.

Nonstop2h 05m

C$ 625

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Fri 30/10

2:50 p.m.-5:44 p.m.

Nonstop1h 54m

Toronto Pearson Intl

Mon 2/11

6:21 p.m.-7:41 p.m.

Nonstop2h 20m

C$ 625

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Tue 24/11

7:03 a.m.-9:47 a.m.

Nonstop1h 44m

Toronto Pearson Intl

Tue 24/11

12:55 p.m.-5:17 p.m.

1 stop5h 22m

C$ 626

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Tue 27/10

8:50 a.m.-2:25 p.m.

1 stop4h 35m

Toronto Pearson Intl

Tue 27/10

5:55 p.m.-7:05 p.m.

Nonstop2h 10m

C$ 636

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Illinois 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

Prices

Airlines

Other information

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

In general, February is the cheapest month to fly from Illinois to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 407. If you are unable to visit Region of Ontario during the month of February, then departing from Illinois during the month June is also very affordable. Most momondo users find prices during this month for around C$ 430.

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

The cheapest day to depart from Illinois to Region of Ontario is on a Friday. Travellers who choose to depart for Region of Ontario on a Friday will often find tickets for as low as C$ 370. The most expensive day to fly to Region of Ontario is Monday, with ticket prices averaging around C$ 477.

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

Our most recent data shows that the best time of day to fly to Region of Ontario is in the evening. Flights from Illinois to Region of Ontario during this time can be as low as C$ 342. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 478 on average. Flights to Region of Ontario from Illinois at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Illinois to Ontario flight route?

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

How far in advance should I book a flight from Illinois to Ontario?

You are more likely to see cheaper flights to Region of Ontario from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around C$ 473 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 Illinois for as low as C$ 385 on momondo.

What cabin class options are available on Illinois to Region of Ontario flights?

There are 4 cabin classes available to choose from on Illinois 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 Illinois to Region of Ontario flights?

No. A direct flight is the cheapest option for a flight between Illinois to Region of Ontario.

Cheap Illinois to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Region of Ontario

Best price found	C$ 136
Fastest flight time	1h 39m
Direct flights	Every day
Airports in Region of Ontario	125 airports

The best one-way flight to Region of Ontario from Illinois in the past 72 hours is C$ 136. The best round-trip flight deal from Illinois to Region of Ontario found on momondo in the last 72 hours is C$ 303.

The fastest flight from Illinois to Region of Ontario takes 1h 39m

Direct flights go from Illinois to Region of Ontario every day.

There are 125 airports in Region of Ontario. From Illinois there are direct flights to Toronto Pearson Intl (YYZ), Toronto Island (YTZ).

Search flight deals

Frequently asked questions about flying from Illinois to Ontario

When did momondo last update prices for flights from Illinois to Ontario?
Prices for flights from Illinois to Ontario are updated daily.
How many operators does momondo search for flights from Illinois to Ontario?
There are 3 operators available for flights from Illinois to Ontario as of September 2026.
How old do you have to be to fly from Illinois to Ontario?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Ontario.
What documentation or ID do you need to fly to Ontario?
The travel and health documents required for your trip to Ontario can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Illinois to Region of Ontario?
Based on momondo bookings for flights between Illinois and Region of Ontario, the leading plane model is De Havilland (Bombardier) DHC-8-400 Dash 8Q, making up 23.65% of the total bookings. Other popular models include Embraer 175 with 12.55%, Embraer 175 (Enhanced Winglets) with 9.89%, and Boeing 737-800 with 6.20%.

Best airlines flying from Illinois to Region of Ontario

Compare and see reviews for airlines that fly from Illinois to Region of Ontario with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom C$ 138	Free Cancellation	Rating 7.0 12,097 reviews	Search American Airlines flights
Air Canada	PriceFrom C$ 292	Free Cancellation	Rating 7.1 11,702 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 354	Free Cancellation	Rating 7.4 10,246 reviews	Search United Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Ontario . Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to Ontario from Illinois with this policy.

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

momondo provides multiple filters to help you find the best flight to Ontario from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Illinois to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Region of Ontario trip

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Complete your trip

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Popular Cities in Ontario

Flights to Torontofrom C$ 160

Flights to Vancouverfrom C$ 110

Flights to Calgaryfrom C$ 124

Flights to Montrealfrom C$ 287

Flights to Halifaxfrom C$ 161

Flights to Winnipegfrom C$ 182

Flights to Ottawafrom C$ 198

Flights to Kelownafrom C$ 116

Flights to Saskatoonfrom C$ 202

Flights to St. John'sfrom C$ 214

Flights to Reginafrom C$ 233

Flights to Québec Cityfrom C$ 303

Cheap flights from Illinois to Ontario from C$ 136

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Ontario departing on 10/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Illinois to Ontario

Cheap round-trip flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

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Price Alerts

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Lufthansa flights from Illinois to Region of Ontario

Our best Lufthansa deals on Illinois to Region of Ontario flight tickets

Delta flights from Illinois to Region of Ontario

Our best Delta deals on Illinois to Region of Ontario flight tickets

momondo Fare Finder

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

See travel insights to Ontario from

How to get the cheapest flight ticket from Illinois to Region of Ontario

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

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

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

What is the cheapest Illinois to Ontario flight route?

How far in advance should I book a flight from Illinois to Ontario?

What cabin class options are available on Illinois to Region of Ontario flights?

Can stopping save me money on Illinois to Region of Ontario flights?

What is the cheapest airline that flies from Illinois to Ontario?

Which airlines fly to Region of Ontario?

How many flights depart from Illinois to Region of Ontario on average per day?

How many flights depart from Illinois to Region of Ontario on average per week?

Cheap Illinois to Region of Ontario flight deals and tips

Best price found

Fastest flight time

Direct flights

Airports in Region of Ontario

Frequently asked questions about flying from Illinois to Ontario

Best airlines flying from Illinois to Region of Ontario

Compare and see reviews for airlines that fly from Illinois to Region of Ontario with momondo

Why use momondo?

An easier way to manage your Region of Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Ontario

Popular Cities in Ontario

Popular flights according to clicks in the last 7 days on momondo

Illinois flight routes

According to popular flight searches on momondo this year

Region of Ontario flight routes

According to popular flight searches on momondo this year

Fly your favourite airline to Ontario

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Ontario

Explore popular destinations other users love

According to popular flight searches on momondo this year