How many flights depart from Montreal to Illinois on average per week?

The number of flights available between Montreal and Illinois is 154 per week as of March 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

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 according to our data. Air Canada is the first choice among our users, with 65% 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.

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

Air Canada, Delta, and American Airlines are the most popular carriers operating from Montreal to Illinois

How many flights depart from Montreal to Illinois on average per day?

The number of flights available between Montreal and Illinois is 22 per day as of March 2026. The most frequent departure time is 3:00p.m., with 58% of daily flights leaving in the afternoon.

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

Prices for flights from Montreal to Illinois are refreshed on a daily basis.

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

There are 5 operators available for flights from Montreal to Illinois as of March 2026.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Montreal 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$ 159 Cheap Flights from Montreal to Illinois in 2026

1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Montreal 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$ 238Air Canada

Thu, 9 Apr - Sun, 12 Apr

10:35 a.m. - 2:35 p.m.

YUL

MDW

5h 00m

1 stop

10:25 a.m. - 5:15 p.m.

MDW

YUL

5h 50m

1 stop

C$ 246Porter Airlines

Fri, 1 May - Sun, 3 May

6:30 a.m. - 9:40 a.m.

YUL

MDW

4h 10m

1 stop

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

MDW

YUL

5h 50m

1 stop

C$ 250Porter Airlines

Fri, 8 May - Sun, 10 May

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

YUL

MDW

4h 25m

1 stop

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

MDW

YUL

4h 30m

1 stop

C$ 251Porter Airlines

Wed, 15 Apr - Tue, 21 Apr

6:30 a.m. - 9:40 a.m.

YUL

MDW

4h 10m

1 stop

3:20 p.m. - 8:10 p.m.

MDW

YUL

3h 50m

1 stop

C$ 254Porter Airlines

Thu, 7 May - Mon, 11 May

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

YUL

ORD

2h 38mdirect

7:55 a.m. - 1:21 p.m.

ORD

YUL

4h 26m

1 stop

C$ 255Air Canada

Thu, 9 Apr - Sun, 12 Apr

6:30 a.m. - 9:40 a.m.

YUL

MDW

4h 10m

1 stop

3:20 p.m. - 8:10 p.m.

MDW

YUL

3h 50m

1 stop

C$ 255Porter Airlines

Fri, 8 May - Sun, 10 May

6:10 a.m. - 8:00 a.m.

YUL

ORD

2h 50mdirect

7:13 a.m. - 10:40 a.m.

ORD

YUL

2h 27mdirect

C$ 272United Airlines

Thu, 9 Apr - Sun, 12 Apr

12:30 p.m. - 11:46 p.m.

YUL

STL

12h 16m

1 stop

4:30 p.m. - 11:44 a.m.

STL

YUL

18h 14m

1 stop

C$ 486American Airlines

Mon, 20 Apr - Sat, 25 Apr

12:30 p.m. - 11:46 p.m.

YUL

STL

12h 16m

1 stop

5:21 p.m. - 11:44 a.m.

STL

YUL

17h 23m

1 stop

C$ 506American Airlines

Mon, 20 Apr - Sat, 25 Apr

Air Canada flights from Montreal to Illinois

Our best Air Canada deals on Montreal to Illinois flight tickets

Air Canada

9 Apr

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

2h 38m

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

12 Apr

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

2h 15m

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

C$ 238

Air Canada

9 Apr

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

2h 38m

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

12 Apr

ORD7:55 a.m.Chicago O'Hare Intl

4h 26m

1 stop

YUL1:21 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 255

Air Canada

1 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$ 258

American Airlines flights from Montreal to Illinois

Our best American Airlines deals on Montreal to Illinois flight tickets

American Airlines

31 Mar

YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl

10h 53m

1 stop

ORD5:23 p.m.Chicago O'Hare Intl

10 Apr

ORD6:05 a.m.Chicago O'Hare Intl

15h 53m

1 stop

YUL10:58 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 307

American Airlines

31 Mar

YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl

10h 53m

1 stop

ORD5:23 p.m.Chicago O'Hare Intl

5 Apr

ORD6:40 a.m.Chicago O'Hare Intl

4h 44m

1 stop

YUL12:24 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 331

American Airlines

20 Apr

YUL12:30 p.m.Montreal Pierre Elliott Trudeau Intl

12h 16m

1 stop

STL11:46 p.m.Lambert-St Louis

25 Apr

STL8:03 p.m.Lambert-St Louis

14h 41m

1 stop

YUL11:44 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 486

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

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

Nonstop2h 38m

Chicago O'Hare Intl

Sun 12/4

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

Nonstop2h 15m

C$ 238

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 1/5

10:35 a.m.-2:35 p.m.

1 stop5h 00m

Chicago Midway

Sun 3/5

10:25 a.m.-5:15 p.m.

1 stop5h 50m

C$ 246

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

6:30 a.m.-9:40 a.m.

1 stop4h 10m

Chicago Midway

Sun 10/5

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

1 stop5h 50m

C$ 250

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Wed 15/4

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

1 stop4h 25m

Chicago Midway

Tue 21/4

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

1 stop4h 30m

C$ 251

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 7/5

6:30 a.m.-9:40 a.m.

1 stop4h 10m

Chicago Midway

Mon 11/5

3:20 p.m.-8:10 p.m.

1 stop3h 50m

C$ 254

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

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

Nonstop2h 38m

Chicago O'Hare Intl

Sun 12/4

7:55 a.m.-1:21 p.m.

1 stop4h 26m

C$ 255

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

6:30 a.m.-9:40 a.m.

1 stop4h 10m

Chicago Midway

Sun 10/5

3:20 p.m.-8:10 p.m.

1 stop3h 50m

C$ 255

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

6:10 a.m.-8:00 a.m.

Nonstop2h 50m

Chicago O'Hare Intl

Sun 12/4

7:13 a.m.-10:40 a.m.

Nonstop2h 27m

C$ 272

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

12:30 p.m.-11:46 p.m.

1 stop12h 16m

Lambert-St Louis

Sat 25/4

4:30 p.m.-11:44 a.m.

1 stop18h 14m

C$ 486

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

12:30 p.m.-11:46 p.m.

1 stop12h 16m

Lambert-St Louis

Sat 25/4

5:21 p.m.-11:44 a.m.

1 stop17h 23m

C$ 506

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 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, March is the cheapest month to fly from Montreal to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 377. If you don’t want to visit Illinois in March, then you should wait until September to fly from Montreal, when ticket prices are also cheap, with an average price of C$ 379.

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. The lowest ticket price found for a Thursday departure recently was C$ 680. 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$ 1,025.

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 to Illinois during this time can be as low as C$ 751. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,159 on average. Flights to Illinois from Montreal at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Montreal to Illinois flight route?

Fly from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl for the best Montreal - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around C$ 465 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Montreal for as low as C$ 306 on momondo.

What cabin class options are available on Montreal to Illinois flights?

There are 4 cabin classes available to choose from on Montreal 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 to Illinois flights?

No. A direct flight is the cheapest option for a flight between Montreal to Illinois.

When did momondo last update prices for flights from Montreal to Illinois?
Prices for flights from Montreal to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Montreal to Illinois?
There are 5 operators available for flights from Montreal to Illinois as of March 2026.
How old do you have to be to fly from Montreal to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Montreal 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 to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Montreal to Illinois is Embraer 175 (Enhanced Winglets), representing 24.47% of all bookings. The subsequent popular models are Embraer 170 at 18.51%, Canadair (Bombardier) Regional Jet 900 at 11.66%, and Embraer 175 at 10.07%.

Best airlines flying from Montreal to Illinois

Compare and see reviews for airlines that fly from Montreal to Illinois with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom C$ 174	Free Cancellation	Rating 7.1 11,433 reviews	Search American Airlines flights
Porter Airlines	PriceFrom C$ 186	Free Cancellation	Rating 8.0 423 reviews	Search Porter Airlines flights
Air Canada	PriceFrom C$ 246	Free Cancellation	Rating 7.1 10,800 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 260	Free Cancellation	Rating 7.4 9,418 reviews	Search United Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from Montreal.

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

Yes. All flights to Illinois from Montreal on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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

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

If you are not ready to book a flight from Montreal to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.