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

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

Which airlines fly to Illinois?

Air Canada, United Airlines and Porter 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 66% 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 March 2026, 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$ 162 Cheap Flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois in 2026

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 94 per week as of March 2026. The most frequent departure day is Wed, with 23% of weekly flights leaving on this day.

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

13 flights are operational daily from Montreal Pierre Elliott Trudeau Intl Airport to Illinois as of March 2026. The most popular departure time for this route is 3:00p.m., with 61% of flights per day taking off in the afternoon.

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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

Enter your travel dates to find the best prices.

9:15 a.m. - 10:53 a.m.

YUL

ORD

2h 38mdirect

12:50 p.m. - 4:05 p.m.

ORD

YUL

2h 15mdirect

C$ 241Air Canada

Thu, 16 Apr - Sun, 19 Apr

6:50 a.m. - 10:15 a.m.

YUL

MDW

4h 25m

1 stop

10:30 a.m. - 5:15 p.m.

MDW

YUL

5h 45m

1 stop

C$ 242Porter Airlines

Thu, 30 Apr - Sun, 3 May

6:30 a.m. - 9:45 a.m.

YUL

MDW

4h 15m

1 stop

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

MDW

YUL

5h 50m

1 stop

C$ 248Porter Airlines

Fri, 8 May - Mon, 11 May

6:30 a.m. - 9:45 a.m.

YUL

MDW

4h 15m

1 stop

10:30 a.m. - 6:15 p.m.

MDW

YUL

6h 45m

1 stop

C$ 249Porter Airlines

Fri, 8 May - Mon, 11 May

6:50 a.m. - 10:15 a.m.

YUL

MDW

4h 25m

1 stop

10:30 a.m. - 6:15 p.m.

MDW

YUL

6h 45m

1 stop

C$ 250Porter Airlines

Thu, 30 Apr - Tue, 12 May

6:30 a.m. - 9:45 a.m.

YUL

MDW

4h 15m

1 stop

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

MDW

YUL

5h 50m

1 stop

C$ 252Porter Airlines

Wed, 6 May - Wed, 13 May

9:15 a.m. - 1:05 p.m.

YUL

ORD

4h 50m

1 stop

8:40 a.m. - 11:51 a.m.

ORD

YUL

2h 11mdirect

C$ 259Air Canada

Thu, 16 Apr - Sun, 19 Apr

5:00 p.m. - 6:52 p.m.

YUL

ORD

2h 52mdirect

6:03 p.m. - 9:26 p.m.

ORD

YUL

2h 23mdirect

C$ 277United Airlines

Wed, 29 Apr - Sun, 3 May

7:41 p.m. - 12:05 p.m.

YUL

STL

17h 24m

1 stop

6:05 a.m. - 6:51 p.m.

STL

YUL

11h 46m

1 stop

C$ 618Delta

Fri, 1 May - Tue, 5 May

7:41 p.m. - 12:05 p.m.

YUL

STL

17h 24m

1 stop

5:27 p.m. - 8:40 a.m.

STL

YUL

14h 13m

1 stop

C$ 620Delta

Fri, 1 May - Tue, 5 May

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

16 Apr

YUL9:15 a.m.Montreal Pierre Elliott Trudeau Intl

2h 38m

ORD10:53 a.m.Chicago O'Hare Intl

19 Apr

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

2h 15m

YUL4:05 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 241

Air Canada

16 Apr

YUL9:15 a.m.Montreal Pierre Elliott Trudeau Intl

4h 50m

1 stop

ORD1:05 p.m.Chicago O'Hare Intl

19 Apr

ORD8:40 a.m.Chicago O'Hare Intl

2h 11m

YUL11:51 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 259

Air Canada

4 Jun

YUL4:30 p.m.Montreal Pierre Elliott Trudeau Intl

4h 46m

1 stop

ORD8:16 p.m.Chicago O'Hare Intl

7 Jun

ORD7:25 a.m.Chicago O'Hare Intl

5h 20m

1 stop

YUL1:45 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 264

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

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

Porter Airlines

30 Apr

YUL6:50 a.m.Montreal Pierre Elliott Trudeau Intl

4h 25m

1 stop

MDW10:15 a.m.Chicago Midway

3 May

MDW10:30 a.m.Chicago Midway

5h 45m

1 stop

YUL5:15 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 242

Porter Airlines

8 May

YUL6:30 a.m.Montreal Pierre Elliott Trudeau Intl

4h 15m

1 stop

MDW9:45 a.m.Chicago Midway

11 May

MDW3:20 p.m.Chicago Midway

5h 50m

1 stop

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

C$ 248

Porter Airlines

8 May

YUL6:30 a.m.Montreal Pierre Elliott Trudeau Intl

4h 15m

1 stop

MDW9:45 a.m.Chicago Midway

11 May

MDW10:30 a.m.Chicago Midway

6h 45m

1 stop

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

C$ 249

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

Cheapest round-trip

Quickest round-trip

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 16/4

9:15 a.m.-10:53 a.m.

Nonstop2h 38m

Chicago O'Hare Intl

Sun 19/4

12:50 p.m.-4:05 p.m.

Nonstop2h 15m

C$ 241

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 30/4

6:50 a.m.-10:15 a.m.

1 stop4h 25m

Chicago Midway

Sun 3/5

10:30 a.m.-5:15 p.m.

1 stop5h 45m

C$ 242

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

6:30 a.m.-9:45 a.m.

1 stop4h 15m

Chicago Midway

Mon 11/5

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

1 stop5h 50m

C$ 248

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

6:30 a.m.-9:45 a.m.

1 stop4h 15m

Chicago Midway

Mon 11/5

10:30 a.m.-6:15 p.m.

1 stop6h 45m

C$ 249

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 30/4

6:50 a.m.-10:15 a.m.

1 stop4h 25m

Chicago Midway

Tue 12/5

10:30 a.m.-6:15 p.m.

1 stop6h 45m

C$ 250

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

6:30 a.m.-9:45 a.m.

1 stop4h 15m

Chicago Midway

Wed 13/5

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

1 stop5h 50m

C$ 252

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 16/4

9:15 a.m.-1:05 p.m.

1 stop4h 50m

Chicago O'Hare Intl

Sun 19/4

8:40 a.m.-11:51 a.m.

Nonstop2h 11m

C$ 259

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 29/4

5:00 p.m.-6:52 p.m.

Nonstop2h 52m

Chicago O'Hare Intl

Sun 3/5

6:03 p.m.-9:26 p.m.

Nonstop2h 23m

C$ 277

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 1/5

7:41 p.m.-12:05 p.m.

1 stop17h 24m

Lambert-St Louis

Tue 5/5

6:05 a.m.-6:51 p.m.

1 stop11h 46m

C$ 618

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 1/5

7:41 p.m.-12:05 p.m.

1 stop17h 24m

Lambert-St Louis

Tue 5/5

5:27 p.m.-8:40 a.m.

1 stop14h 13m

C$ 620

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, January 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$ 321. If you don’t want to visit Illinois in January, then you should wait until May to fly from Montreal Pierre Elliott Trudeau Intl Airport, when ticket prices are also cheap, with an average price of C$ 324.

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$ 705. 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$ 1,064.

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$ 757. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,182 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$ 477 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$ 311 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?

No. A direct flight is the cheapest option for a flight between Montreal Pierre Elliott Trudeau Intl Airport to Illinois.

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$ 401
Fastest flight time	2h 35m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Montreal Pierre Elliott Trudeau Intl Airport in the past 72 hours is C$ 401. 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$ 531.

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 are 98 airports in Illinois. From Montreal Pierre Elliott Trudeau Intl Airport there are direct flights to 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 March 2026, 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) (25.04% of total bookings). The next most popular plane models are Embraer 170 (18.55%), Canadair (Bombardier) Regional Jet 900 (11.34%), and Embraer 175 (10.51%).

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 7.1 11,517 reviews	Search American Airlines flights
Porter Airlines	PriceFrom C$ 189	Free Cancellation	Rating 8.0 428 reviews	Search Porter Airlines flights
Air Canada	PriceFrom C$ 250	Free Cancellation	Rating 7.1 10,853 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 258	Free Cancellation	Rating 7.4 9,500 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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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois from C$ 162

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

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

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Our best Porter Airlines 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

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?

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?

Can stopping save me money on Montreal Pierre Elliott Trudeau Intl Airport to Illinois flights?

What is the cheapest airline that flies 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?

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

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

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?

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

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

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