What is the cheapest airline that flies from Montreal Pierre Elliott Trudeau Intl to Illinois?

Air Canada, Porter Airlines, and Delta are the most popular carriers operating from Montreal Pierre Elliott Trudeau Intl to Illinois

Which airlines fly to Illinois?

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to Illinois from Montreal Pierre Elliott Trudeau Intl Airport according to our data. Air Canada is the first choice among our users, with 68% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many operators does momondo search for flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

As of November 2025, there are 5 operators available to choose from for flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois.

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

The travel and health documents required for your trip to Illinois 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 Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

C$ 199 Cheap Flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois in 2025/26

Q: How many flights depart from Montreal Pierre Elliott Trudeau Intl Airport to Illinois on average per day?

18 flights are operational daily from Montreal Pierre Elliott Trudeau Intl Airport to Illinois as of November 2025. The most popular departure time for this route is 6:00a.m., with 54% of flights per day taking off in the afternoon.

Q: How many flights depart from Montreal Pierre Elliott Trudeau Intl Airport to Illinois on average per week?

The number of flights available between Montreal Pierre Elliott Trudeau Intl Airport and Illinois is 128 per week as of November 2025. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

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Find the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

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One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:10 p.m. - 5:48 p.m.YUL-ORD

4h 38m1 stop

12:50 p.m. - 3:57 p.m.ORD-YUL

2h 07mdirect

C$ 324Air Canada

Find Deal

Tue, 24 Feb - Tue, 3 Mar

10:10 a.m. - 3:10 p.m.YUL-ORD

6h 00m1 stop

3:35 p.m. - 6:40 p.m.ORD-YUL

2h 05mdirect

C$ 325Air Canada

Find Deal

Sat, 24 Jan - Wed, 28 Jan

10:15 a.m. - 3:20 p.m.YUL-MDW

6h 05m1 stop

11:00 a.m. - 6:45 p.m.MDW-YUL

6h 45m1 stop

C$ 326Porter Airlines

Find Deal

Thu, 2 Apr - Tue, 7 Apr

2:25 p.m. - 11:35 a.m.YUL-ORD

22h 10m1 stop

8:09 a.m. - 3:20 p.m.ORD-YUL

6h 11m1 stop

C$ 340American Airlines

Find Deal

Thu, 5 Feb - Sun, 8 Feb

8:55 a.m. - 11:50 a.m.YUL-MDW

3h 55m1 stop

11:00 a.m. - 4:30 p.m.MDW-YUL

4h 30m1 stop

C$ 346Porter Airlines

Find Deal

Sat, 4 Apr - Tue, 7 Apr

2:25 p.m. - 7:40 p.m.YUL-ORD

6h 15m1 stop

8:55 p.m. - 3:24 p.m.ORD-YUL

17h 29m1 stop

C$ 422American Airlines

Find Deal

Tue, 24 Feb - Tue, 3 Mar

7:10 a.m. - 1:07 p.m.YUL-MDW

6h 57m1 stop

10:47 a.m. - 5:21 p.m.MDW-YUL

5h 34m1 stop

C$ 476WestJet

Find Deal

Sat, 22 Nov - Sun, 23 Nov

7:00 p.m. - 11:01 a.m.YUL-STL

17h 01m2 stops

6:42 p.m. - 12:46 p.m.STL-YUL

17h 04m2 stops

C$ 806United Airlines

Find Deal

Fri, 5 Dec - Mon, 8 Dec

6:30 p.m. - 8:58 a.m.YUL-STL

15h 28m1 stop

7:10 a.m. - 12:43 a.m.STL-YUL

16h 33m2 stops

C$ 955WestJet

Find Deal

Fri, 19 Dec - Sat, 3 Jan

7:00 a.m. - 2:31 p.m.YUL-STL

8h 31m2 stops

10:00 a.m. - 8:32 p.m.STL-YUL

9h 32m2 stops

C$ 981United Airlines

Find Deal

Thu, 26 Mar - Sat, 28 Mar

Air Canada flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

Our best Air Canada deals on Montreal Pierre Elliott Trudeau Intl Airport to Illinois flight tickets

Air Canada

24 Feb

YUL2:10 p.m.Montreal Pierre Elliott Trudeau Intl

4h 38m

1 stop

ORD5:48 p.m.Chicago O'Hare Intl

3 Mar

ORD12:50 p.m.Chicago O'Hare Intl

2h 07m

YUL3:57 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 324

Find similar

Air Canada

24 Jan

YUL10:10 a.m.Montreal Pierre Elliott Trudeau Intl

6h 00m

1 stop

ORD3:10 p.m.Chicago O'Hare Intl

28 Jan

ORD3:35 p.m.Chicago O'Hare Intl

2h 05m

YUL6:40 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 325

Find similar

Air Canada

22 Jan

YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl

3h 06m

ORD6:51 p.m.Chicago O'Hare Intl

26 Jan

ORD10:35 a.m.Chicago O'Hare Intl

2h 25m

YUL2:00 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 335

Find similar

Delta flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

Our best Delta deals on Montreal Pierre Elliott Trudeau Intl Airport to Illinois flight tickets

Delta

4 Apr

YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl

4h 35m

1 stop

ORD9:35 a.m.Chicago O'Hare Intl

8 Apr

ORD7:10 a.m.Chicago O'Hare Intl

8h 54m

1 stop

YUL5:04 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 326

Find similar

Delta

4 Apr

YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl

4h 35m

1 stop

ORD9:35 a.m.Chicago O'Hare Intl

7 Apr

ORD7:10 a.m.Chicago O'Hare Intl

8h 54m

1 stop

YUL5:04 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 357

Find similar

Delta

23 Nov

YUL12:45 p.m.Montreal Pierre Elliott Trudeau Intl

7h 07m

1 stop

ORD6:52 p.m.Chicago O'Hare Intl

30 Nov

ORD6:45 a.m.Chicago O'Hare Intl

9h 36m

1 stop

YUL5:21 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 423

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 24/2

2:10 p.m.-5:48 p.m.

1 stop4h 38m

Chicago O'Hare Intl

Tue 3/3

12:50 p.m.-3:57 p.m.

Nonstop2h 07m

C$ 324

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 24/1

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

1 stop6h 00m

Chicago O'Hare Intl

Wed 28/1

3:35 p.m.-6:40 p.m.

Nonstop2h 05m

C$ 325

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 2/4

10:15 a.m.-3:20 p.m.

1 stop6h 05m

Chicago Midway

Tue 7/4

11:00 a.m.-6:45 p.m.

1 stop6h 45m

C$ 326

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 5/2

2:25 p.m.-11:35 a.m.

1 stop22h 10m

Chicago O'Hare Intl

Sun 8/2

8:09 a.m.-3:20 p.m.

1 stop6h 11m

C$ 340

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sat 4/4

8:55 a.m.-11:50 a.m.

1 stop3h 55m

Chicago Midway

Tue 7/4

11:00 a.m.-4:30 p.m.

1 stop4h 30m

C$ 346

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 24/2

2:25 p.m.-7:40 p.m.

1 stop6h 15m

Chicago O'Hare Intl

Tue 3/3

8:55 p.m.-3:24 p.m.

1 stop17h 29m

C$ 422

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sat 22/11

7:10 a.m.-1:07 p.m.

1 stop6h 57m

Chicago Midway

Sun 23/11

10:47 a.m.-5:21 p.m.

1 stop5h 34m

C$ 476

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 5/12

7:00 p.m.-11:01 a.m.

2 stops17h 01m

Lambert-St Louis

Mon 8/12

6:42 p.m.-12:46 p.m.

2 stops17h 04m

C$ 806

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 19/12

6:30 p.m.-8:58 a.m.

1 stop15h 28m

Lambert-St Louis

Sat 3/1

7:10 a.m.-12:43 a.m.

2 stops16h 33m

C$ 955

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 26/3

7:00 a.m.-2:31 p.m.

2 stops8h 31m

Lambert-St Louis

Sat 28/3

10:00 a.m.-8:32 p.m.

2 stops9h 32m

C$ 981

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How to get the cheapest flight ticket from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

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 Illinois?

In general, September is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 387. If you don’t want to visit Illinois in September, then you should wait until June to fly from Montreal Pierre Elliott Trudeau Intl Airport, when ticket prices are also cheap, with an average price of C$ 413.

What is the cheapest day to depart on your flight to Illinois?

According to our data, Thursday is the cheapest day to fly to Illinois from Montreal Pierre Elliott Trudeau Intl Airport. The lowest ticket price found for a Thursday departure recently was C$ 725. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Illinois is Sunday, with ticket prices averaging around C$ 1,003.

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

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois during this time can be as low as C$ 758. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,042 on average. Flights to Illinois from Montreal Pierre Elliott Trudeau Intl Airport at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Montreal Pierre Elliott Trudeau Intl to Illinois flight route?

Fly from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl for the best Montreal Pierre Elliott Trudeau Intl - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Montreal Pierre Elliott Trudeau Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around C$ 521 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Montreal Pierre Elliott Trudeau Intl Airport for as low as C$ 324 on momondo.

What cabin class options are available on Montreal Pierre Elliott Trudeau Intl to Illinois flights?

There are 4 cabin classes available to choose from on Montreal Pierre Elliott Trudeau Intl to Illinois 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 Montreal Pierre Elliott Trudeau Intl Airport to Illinois flights?

You could potentially save up to 8% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to Illinois flight.

Cheap Montreal Pierre Elliott Trudeau Intl Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

Best price found	C$ 306
Fastest flight time	2h 35m
Direct flights	Every day
Airports in Illinois	1 airport

The best one-way flight to Illinois from Montreal Pierre Elliott Trudeau Intl Airport in the past 72 hours is C$ 306. The best round-trip flight deal from Montreal Pierre Elliott Trudeau Intl Airport to Illinois found on momondo in the last 72 hours is C$ 606.

The fastest flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois takes 2h 35m

Direct flights go from Montreal Pierre Elliott Trudeau Intl Airport to Illinois every day.

There is 1 airport near Illinois: Chicago O'Hare Intl (ORD)

Search flight deals

When did momondo last update prices for flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?
Prices for flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?
As of November 2025, there are 5 operators available to choose from for flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois.
How old do you have to be to fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?
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 Montreal Pierre Elliott Trudeau Intl Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois 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 Illinois. 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 Montreal Pierre Elliott Trudeau Intl Airport to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Montreal Pierre Elliott Trudeau Intl Airport to Illinois is Embraer 175 (Enhanced Winglets) (28.67% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (12.79%), Embraer 175 (10.96%), and Canadair (Bombardier) Regional Jet 900 (10.05%).

Best airlines flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

Compare and see reviews for airlines that fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Porter Airlines	PriceFrom C$ 199	Free Cancellation	Rating 8.0 384 reviews	Search Porter Airlines flights
American Airlines	PriceFrom C$ 206	Free Cancellation	Rating 7.2 11,034 reviews	Search American Airlines flights
Air Canada	PriceFrom C$ 262	Free Cancellation	Rating 7.1 10,397 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 275	Free Cancellation	Rating 7.4 8,996 reviews	Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Montreal to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

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

Flights from Montreal to Illinois 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 Montreal to Illinois?

Once you have performed a search for Montreal to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Illinois from Montreal are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Montreal Pierre Elliott Trudeau Intl Airport flight routes

Flights from Montreal Pierre Elliott Trudeau Intl to Ottawa

Flights from Montreal Pierre Elliott Trudeau Intl to Calgary

Flights from Montreal Pierre Elliott Trudeau Intl to Moncton Intl

Flights from Montreal Pierre Elliott Trudeau Intl to Toronto Island

Flights from Montreal Pierre Elliott Trudeau Intl to Vancouver Intl

Flights from Montreal Pierre Elliott Trudeau Intl to Toronto Pearson Intl

Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois from C$ 231

Big names, great deals

Big names, great deals

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Filter for what you want

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Find the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

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Cheap one-way flights

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Air Canada flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

Our best Air Canada deals on Montreal Pierre Elliott Trudeau Intl Airport to Illinois flight tickets

Delta flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

Our best Delta deals on Montreal Pierre Elliott Trudeau Intl Airport to Illinois flight tickets

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Use the filters below to find and compare flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

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 Illinois?

What is the cheapest day to depart on your flight to Illinois?

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

What is the cheapest Montreal Pierre Elliott Trudeau Intl to Illinois flight route?

Fly from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl for the best Montreal Pierre Elliott Trudeau Intl - Illinois flight prices

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

What cabin class options are available on Montreal Pierre Elliott Trudeau Intl to Illinois flights?

There are 4 cabin classes available to choose from on Montreal Pierre Elliott Trudeau Intl to Illinois 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 Montreal Pierre Elliott Trudeau Intl Airport to Illinois flights?

You could potentially save up to 8% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to Illinois flight.

What is the cheapest airline that flies from Montreal Pierre Elliott Trudeau Intl to Illinois?

Air Canada, Porter Airlines, and Delta are the most popular carriers operating from Montreal Pierre Elliott Trudeau Intl to Illinois

Which airlines fly to Illinois?

How many flights depart from Montreal Pierre Elliott Trudeau Intl Airport to Illinois on average per day?

18 flights are operational daily from Montreal Pierre Elliott Trudeau Intl Airport to Illinois as of November 2025. The most popular departure time for this route is 6:00a.m., with 54% of flights per day taking off in the afternoon.

How many flights depart from Montreal Pierre Elliott Trudeau Intl Airport to Illinois on average per week?

The number of flights available between Montreal Pierre Elliott Trudeau Intl Airport and Illinois is 128 per week as of November 2025. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

Cheap Montreal Pierre Elliott Trudeau Intl Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

Best price found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

How many operators does momondo search for flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

How old do you have to be to fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

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

What is the most popular plane model from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

Best airlines flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

Compare and see reviews for airlines that fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois with momondo

Why use momondo?

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

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

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

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

An easier way to manage your Illinois 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 Illinois

Popular Cities in Illinois

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