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

Porter Airlines, Air Canada, and American Airlines 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 69% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 5 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 September 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.

C$ 197 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?

32 flights are operational daily from Montreal Pierre Elliott Trudeau Intl Airport to Illinois as of September 2025. The most popular departure time for this route is 6:00a.m., with 47% 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 229 per week as of September 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

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

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

1:10 p.m. - 4:24 p.m.YUL-MDW

4h 14m1 stop

9:35 a.m. - 4:00 p.m.MDW-YUL

5h 25m1 stop

C$ 325Porter Airlines

Find Deal

Fri, 17 Oct - Mon, 20 Oct

10:45 a.m. - 4:24 p.m.YUL-MDW

6h 39m1 stop

5:20 p.m. - 10:15 p.m.MDW-YUL

3h 55m1 stop

C$ 327Porter Airlines

Find Deal

Thu, 16 Oct - Sun, 19 Oct

6:15 p.m. - 8:00 p.m.YUL-ORD

2h 45mdirect

7:15 a.m. - 10:20 a.m.ORD-YUL

2h 05mdirect

C$ 334Air Canada

Find Deal

Wed, 29 Oct - Wed, 5 Nov

9:10 a.m. - 1:01 p.m.YUL-ORD

4h 51m1 stop

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

2h 07mdirect

C$ 345Air Canada

Find Deal

Wed, 29 Oct - Wed, 5 Nov

9:45 a.m. - 11:23 a.m.YUL-ORD

2h 38mdirect

7:11 a.m. - 10:40 a.m.ORD-YUL

2h 29mdirect

C$ 360United Airlines

Find Deal

Sat, 4 Oct - Tue, 7 Oct

9:45 a.m. - 11:23 a.m.YUL-ORD

2h 38mdirect

2:08 p.m. - 5:26 p.m.ORD-YUL

2h 18mdirect

C$ 363United Airlines

Find Deal

Sat, 4 Oct - Sun, 5 Oct

3:52 p.m. - 5:52 p.m.YUL-ORD

3h 00mdirect

6:35 p.m. - 1:46 p.m.ORD-YUL

18h 11m1 stop

C$ 407American Airlines

Find Deal

Fri, 7 Nov - Mon, 10 Nov

2:29 p.m. - 11:37 p.m.YUL-ORD

10h 08m1 stop

6:46 a.m. - 1:46 p.m.ORD-YUL

6h 00m1 stop

C$ 412American Airlines

Find Deal

Fri, 7 Nov - Tue, 11 Nov

6:00 a.m. - 4:11 p.m.YUL-ORD

11h 11m1 stop

6:59 p.m. - 3:49 p.m.ORD-YUL

19h 50m1 stop

C$ 444WestJet

Find Deal

Sat, 11 Oct - Mon, 13 Oct

6:45 a.m. - 10:26 a.m.YUL-STL

28h 41m2 stops

1:55 p.m. - 12:43 a.m.STL-YUL

9h 48m2 stops

C$ 814WestJet

Find Deal

Wed, 5 Nov - Wed, 12 Nov

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

16 Oct

YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl

10h 41m

1 stop

ORD4:41 p.m.Chicago O'Hare Intl

22 Oct

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

9h 49m

1 stop

YUL5:34 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 400

Find similar

Delta

9 Oct

YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl

10h 41m

1 stop

ORD4:41 p.m.Chicago O'Hare Intl

11 Oct

ORD4:09 p.m.Chicago O'Hare Intl

6h 39m

1 stop

YUL11:48 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 424

Find similar

Delta

14 Oct

YUL9:28 a.m.Montreal Pierre Elliott Trudeau Intl

9h 55m

1 stop

ORD6:23 p.m.Chicago O'Hare Intl

24 Oct

ORD5:20 a.m.Chicago O'Hare Intl

5h 11m

1 stop

YUL11:31 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 429

Find similar

United Airlines flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

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

United Airlines

4 Oct

YUL9:45 a.m.Montreal Pierre Elliott Trudeau Intl

2h 38m

ORD11:23 a.m.Chicago O'Hare Intl

7 Oct

ORD7:11 a.m.Chicago O'Hare Intl

2h 29m

YUL10:40 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 360

Find similar

United Airlines

4 Oct

YUL9:45 a.m.Montreal Pierre Elliott Trudeau Intl

2h 38m

ORD11:23 a.m.Chicago O'Hare Intl

5 Oct

ORD2:08 p.m.Chicago O'Hare Intl

2h 18m

YUL5:26 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 363

Find similar

United Airlines

18 Oct

YUL6:15 a.m.Montreal Pierre Elliott Trudeau Intl

2h 46m

ORD8:01 a.m.Chicago O'Hare Intl

22 Oct

ORD7:11 a.m.Chicago O'Hare Intl

2h 29m

YUL10:40 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 368

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 - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 17/10

1:10 p.m.-4:24 p.m.

1 stop4h 14m

Chicago Midway

Mon 20/10

9:35 a.m.-4:00 p.m.

1 stop5h 25m

C$ 325

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 16/10

10:45 a.m.-4:24 p.m.

1 stop6h 39m

Chicago Midway

Sun 19/10

5:20 p.m.-10:15 p.m.

1 stop3h 55m

C$ 327

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 29/10

6:15 p.m.-8:00 p.m.

Nonstop2h 45m

Chicago O'Hare Intl

Wed 5/11

7:15 a.m.-10:20 a.m.

Nonstop2h 05m

C$ 334

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 29/10

9:10 a.m.-1:01 p.m.

1 stop4h 51m

Chicago O'Hare Intl

Wed 5/11

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

Nonstop2h 07m

C$ 345

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 4/10

9:45 a.m.-11:23 a.m.

Nonstop2h 38m

Chicago O'Hare Intl

Tue 7/10

7:11 a.m.-10:40 a.m.

Nonstop2h 29m

C$ 360

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 4/10

9:45 a.m.-11:23 a.m.

Nonstop2h 38m

Chicago O'Hare Intl

Sun 5/10

2:08 p.m.-5:26 p.m.

Nonstop2h 18m

C$ 363

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 7/11

3:52 p.m.-5:52 p.m.

Nonstop3h 00m

Chicago O'Hare Intl

Mon 10/11

6:35 p.m.-1:46 p.m.

1 stop18h 11m

C$ 407

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 7/11

2:29 p.m.-11:37 p.m.

1 stop10h 08m

Chicago O'Hare Intl

Tue 11/11

6:46 a.m.-1:46 p.m.

1 stop6h 00m

C$ 412

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 11/10

6:00 a.m.-4:11 p.m.

1 stop11h 11m

Chicago O'Hare Intl

Mon 13/10

6:59 p.m.-3:49 p.m.

1 stop19h 50m

C$ 444

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 5/11

6:45 a.m.-10:26 a.m.

2 stops28h 41m

Lambert-St Louis

Wed 12/11

1:55 p.m.-12:43 a.m.

2 stops9h 48m

C$ 814

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 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, June 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$ 415. If you don’t want to visit Illinois in June, then you should wait until February to fly from Montreal Pierre Elliott Trudeau Intl Airport, when ticket prices are also cheap, with an average price of C$ 432.

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

According to our data, Friday is the cheapest day to fly to Illinois from Montreal Pierre Elliott Trudeau Intl Airport. The lowest ticket price found for a Friday departure recently was C$ 755. 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 Monday, with ticket prices averaging around C$ 994.

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$ 768. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,011 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$ 529 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$ 291 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 12% 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$ 450
Fastest flight time	2h 31m
Direct flights	Every day
Airports in Illinois	2 airports

The best one-way flight to Illinois from Montreal Pierre Elliott Trudeau Intl Airport in the past 72 hours is C$ 450. 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$ 522.

The fastest flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois takes 2h 31m

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

There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Lambert-St Louis (STL)

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 September 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) (26.32% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (15.69%), Embraer 175 (14.78%), and Airbus A321-100/200 (10.78%).

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
American Airlines	PriceFrom C$ 178	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Porter Airlines	PriceFrom C$ 203	Free Cancellation	Rating 7.9 363 reviews	Search Porter Airlines flights
Air Canada	PriceFrom C$ 259	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 357	Free Cancellation	Rating 7.4 8,929 reviews	Search United Airlines flights
WestJet	PriceFrom C$ 453	Free Cancellation	Rating 7.2 3,091 reviews	Search WestJet 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.

An easier way to manage your Illinois trip

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Montreal Pierre Elliott Trudeau Intl Airport flight routes

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Flights from Montreal Pierre Elliott Trudeau Intl to Calgary

Flights from Montreal Pierre Elliott Trudeau Intl to Fredericton

Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois from C$ 197

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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

Cheap round-trip flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

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

United Airlines flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

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

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.

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 12% 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?

Porter Airlines, Air Canada, and American Airlines 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?

32 flights are operational daily from Montreal Pierre Elliott Trudeau Intl Airport to Illinois as of September 2025. The most popular departure time for this route is 6:00a.m., with 47% 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 229 per week as of September 2025. The most frequent departure day is Mon, with 14% 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