How long is the flight from Montreal to Illinois?

Airlines like Porter Airlines, United Airlines, and Delta fly from Montreal to Illinois in about 3h. The time it takes to get you to your destination can typically vary by up to 5h 55m. There are 1199 km between Montreal and Illinois. Both multi-stop and direct flights can be found to your destination and back.

What are the cheapest airlines to fly from Montreal to Illinois one-way?

The cheapest airlines for a one-way flight from Montreal to Illinois are Air Canada (C$ 182), Porter Airlines (C$ 183), and United Airlines (C$ 197).

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What are the most popular routes from Montreal to Illinois?

The most popular flight routes from Montreal to Illinois are Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl, Montreal Pierre Elliott Trudeau Intl - Chicago Midway and Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis.

What are the cheapest flights from Montreal to Illinois?

While on average a flight from Montreal to Illinois is generally C$ 1,320, our data shows the cheapest flight currently is C$ 298. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), you can expect to pay C$ 334 for that flight.

What are the most reliable airlines from Montreal to Illinois?

No one likes to see their flight delayed. When booking a flight from Montreal to Illinois consider choosing ANA (84%), Emirates (81%) or Qatar Airways (77%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from Montreal to Illinois?

The most popular airlines flying from Montreal to Illinois are Air Canada, Porter Airlines and United Airlines. Something to consider prior to booking your flight.

Can I find deals for flights from Montreal to Illinois that include hotel bookings?

Yes. In addition to deals on Montreal to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Montreal to Illinois?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montreal to Illinois.

Can I find deals for business class flights from Montreal to Illinois?

Yes. Cheapflights offers flight deals from Montreal to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 252+ Cheap Flights from Montreal to Illinois

Cheap flight deals from Montreal to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Montreal to Illinois
Explore the most affordable flight options available from Montreal to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2026.

Sun 22/1110:10 a.m. -

1 stop6h 28m

Fri 27/1110:15 a.m. -

2 stops9h 38m

Deal found 27/10C$ 407

Thu 24/128:50 a.m. -

2 stops7h 48m

Fri 1/112:50 p.m. -

2 stops7h 03m

Deal found 26/10C$ 408

Thu 19/118:45 a.m. -

1 stop5h 35m

Thu 26/111:55 p.m. -

Nonstop2h 12m

Deal found 26/10C$ 410

Sat 14/1111:10 a.m. -

1 stop5h 28m

Sun 15/117:05 a.m. -

Nonstop2h 12m

Deal found 25/10C$ 415

Thu 19/1111:10 a.m. -

1 stop5h 28m

Mon 23/113:50 p.m. -

Nonstop2h 15m

Deal found 27/10C$ 417

Sat 21/116:10 p.m. -

Nonstop2h 42m

Wed 25/111:55 p.m. -

1 stop6h 50m

Deal found 25/10C$ 418

Tue 15/127:00 a.m. -

1 stop6h 24m

Sun 27/121:26 p.m. -

1 stop9h 03m

Deal found 25/10C$ 421

Thu 12/1112:50 p.m. -

1 stop6h 14m

Mon 16/111:05 p.m. -

1 stop9h 43m

Deal found 26/10C$ 421

Thu 17/129:45 a.m. -

1 stop8h 55m

Mon 28/1212:15 p.m. -

1 stop5h 51m

Deal found 25/10C$ 422

Wed 25/1112:10 p.m. -

Nonstop3h 05m

Sat 28/118:08 a.m. -

Nonstop2h 18m

Deal found 27/10C$ 425

Wed 18/119:45 a.m. -

1 stop8h 55m

Sun 22/1112:15 p.m. -

1 stop5h 50m

Deal found 26/10C$ 428

Thu 3/126:00 a.m. -

1 stop4h 37m

Sun 6/126:41 p.m. -

1 stop3h 52m

Deal found 28/10C$ 452

Best flights from Montreal to Illinois
Discover carefully curated flight deals from Montreal to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Sat 10/49:45 a.m. -

1 stop8h 55m

Mon 12/412:20 p.m. -

1 stop5h 45m

Deal found 25/10C$ 439

Fri 27/116:00 a.m. -

Nonstop3h 00m

Sun 6/1210:37 a.m. -

Nonstop2h 23m

Deal found 25/10C$ 445

Fri 20/116:00 a.m. -

Nonstop3h 00m

Mon 23/113:50 p.m. -

Nonstop2h 15m

Deal found 28/10C$ 466

Fri 20/116:00 a.m. -

1 stop7h 51m

Mon 23/116:00 a.m. -

1 stop10h 27m

Deal found 28/10C$ 469

Fri 27/116:00 a.m. -

Nonstop3h 00m

Tue 8/125:54 p.m. -

Nonstop2h 23m

Deal found 25/10C$ 445

Sun 15/116:00 a.m. -

1 stop8h 59m

Wed 18/116:49 a.m. -

1 stop9h 38m

Deal found 28/10C$ 470

Thu 26/116:00 a.m. -

Nonstop3h 00m

Mon 30/117:05 a.m. -

Nonstop2h 12m

Deal found 29/10C$ 480

Wed 11/1112:44 p.m. -

1 stop7h 21m

Fri 13/113:59 p.m. -

1 stop6h 49m

Deal found 27/10C$ 470

Fri 20/116:00 a.m. -

Nonstop3h 00m

Mon 23/115:55 a.m. -

1 stop8h 21m

Deal found 29/10C$ 473

Mon 21/124:00 p.m. -

1 stop9h 15m

Thu 31/125:00 a.m. -

1 stop9h 14m

Deal found 28/10C$ 1,067

Thu 17/124:45 p.m. -

Nonstop3h 00m

Sat 9/11:55 p.m. -

1 stop6h 50m

Deal found 28/10C$ 488

Wed 11/119:40 a.m. -

1 stop8h 08m

Sat 14/1112:38 p.m. -

1 stop9h 52m

Deal found 28/10C$ 470

Wed 25/112:13 p.m. -

1 stop10h 49m

Tue 1/128:52 a.m. -

1 stop5h 24m

Deal found 29/10C$ 483

Wed 11/116:00 a.m. -

1 stop4h 46m

Mon 16/116:44 p.m. -

1 stop3h 43m

Deal found 27/10C$ 470

Tue 8/127:00 a.m. -

1 stop6h 04m

Wed 9/125:12 p.m. -

1 stop5h 36m

Deal found 26/10C$ 481

Thu 19/117:00 a.m. -

1 stop5h 59m

Mon 23/115:29 p.m. -

1 stop5h 01m

Deal found 26/10C$ 481

Wed 25/116:00 a.m. -

1 stop8h 59m

Sun 29/116:49 a.m. -

1 stop9h 38m

Deal found 29/10C$ 492

Wed 25/116:00 a.m. -

1 stop4h 46m

Mon 30/1112:30 p.m. -

1 stop10h 00m

Deal found 29/10C$ 492

Tue 24/116:00 a.m. -

1 stop4h 46m

Sun 29/116:00 a.m. -

1 stop10h 27m

Deal found 26/10C$ 520

Mon 23/116:00 a.m. -

1 stop4h 46m

Sun 29/116:00 a.m. -

1 stop10h 27m

Deal found 26/10C$ 520

Mon 21/129:15 a.m. -

2 stops14h 27m

Thu 31/126:15 a.m. -

2 stops14h 27m

Deal found 28/10C$ 962

Mon 23/116:00 a.m. -

1 stop4h 46m

Thu 26/1112:05 p.m. -

1 stop6h 42m

Deal found 26/10C$ 520

Sat 12/129:15 a.m. -

2 stops8h 30m

Sat 19/128:40 a.m. -

2 stops22h 52m

Deal found 28/10C$ 1,041

Thu 28/16:40 p.m. -

1 stop6h 15m

Sun 31/16:40 p.m. -

1 stop3h 46m

Deal found 28/10C$ 550

Sat 3/46:00 a.m. -

1 stop7h 33m

Tue 6/49:30 a.m. -

1 stop5h 29m

Deal found 28/10C$ 550

Find flight deals from Montreal to Illinois

Round-trip from	C$ 400
One-way from	C$ 252
Popular in	July
Cheapest in	April
Average price	C$ 488
Good round-trip deal	C$ 677 or less
Good one-way deal	C$ 453 or less

Porter Airlines
18/2-22/2
2 total stops
14h 32m total
Montreal to Illinois

Search Deals

Air Canada
18/11-31/12
Nonstop
2h 52m total
Montreal to Illinois

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (C$ 77 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 17 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Price to beat on a round-trip flight from Montreal (YMQ) to Illinois.

Search Deals

Price to beat on a one-way flight from Montreal (YMQ) to Illinois.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 21/11

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

Nonstop3h 00m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 259

Quickest round-trip

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 12/12

6:10 p.m.-7:52 p.m.

Nonstop2h 42m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 269

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 24/12

1:10 p.m.-2:52 p.m.

Nonstop2h 42m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 270

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 20/11

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

Nonstop3h 00m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 274

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 12/11

12:44 p.m.-8:49 p.m.

1 stop9h 05m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 277

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 15/11

6:00 a.m.-1:59 p.m.

1 stop8h 59m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 277

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 25/11

6:00 a.m.-1:59 p.m.

1 stop8h 59m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 277

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 12/12

2:53 p.m.-11:56 p.m.

1 stop10h 03m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 277

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - MDW Chicago Midway

YULMDW

Montreal Pierre Elliott Trudeau Intl

Tue 15/12

6:00 a.m.-1:01 p.m.

1 stop8h 01m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 277

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - MDW Chicago Midway

YULMDW

Montreal Pierre Elliott Trudeau Intl

Mon 14/12

7:00 a.m.-4:16 p.m.

1 stop10h 16m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 287

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/10

Showing 1-10 of 47 resultsSorted by cheapest first

...

Best time to book a flight from Montreal to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Montreal with our price prediction graph.

YUL-ORD

YUL-MDW

YUL-SPI

YUL-PIA

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Montreal to Illinois

YMQ-USIL

YUL-ORD

YUL-MDW

YUL-SPI

YUL-PIA

What is the cheapest month to book a flight from Montreal to Illinois?

Currently, April is the cheapest month in which you can book a flight from Montreal to Illinois (average of C$ 389). Flying from Montreal to Illinois in July is currently the most expensive (average of C$ 538). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YMQ to IL?

Unlike at noon, when flights are generally more expensive, you can save up to 58% on flights from Montreal to Illinois by exploring options for tickets in the evening.

How much does it cost to fly round-trip from Montreal to Illinois?

Airfare is below average for this route at the moment.

Montreal to Illinois flights typically cost between C$ 477 and C$ 603 in February.
The cheapest round-trip price found within the last 5 days was C$ 400 on Porter Airlines (18 Feb-22 Feb).

How far ahead should I book a flight from Montreal to Illinois?

The best time to book flights from Montreal to Illinois is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

Read reviews from past customers who have flown Porter Airlines,Delta, andUnited Airlines from Montreal to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

467 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.

Porter Airlines

8.0

Very good

467 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

Delta

7.8

Good

8,696 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

United Airlines

7.3

Good

10,455 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

Air Canada

7.1

Good

11,834 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

American Airlines

7.0

Good

12,220 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

Related info for your journey

How long is the flight from Montreal to Illinois?
Airlines like Porter Airlines, United Airlines, and Delta fly from Montreal to Illinois in about 3h. The time it takes to get you to your destination can typically vary by up to 5h 55m. There are 1199 km between Montreal and Illinois. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines to fly from Montreal to Illinois one-way?
The cheapest airlines for a one-way flight from Montreal to Illinois are Air Canada (C$ 182), Porter Airlines (C$ 183), and United Airlines (C$ 197).
What are the most popular routes from Montreal to Illinois?
The most popular flight routes from Montreal to Illinois are Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl, Montreal Pierre Elliott Trudeau Intl - Chicago Midway and Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis.
What are the most reliable airlines from Montreal to Illinois?
No one likes to see their flight delayed. When booking a flight from Montreal to Illinois consider choosing ANA (84%), Emirates (81%) or Qatar Airways (77%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Montreal to Illinois?
While on average a flight from Montreal to Illinois is generally C$ 1,320, our data shows the cheapest flight currently is C$ 298. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), you can expect to pay C$ 334 for that flight.
Can I find deals for flights from Montreal to Illinois that include hotel bookings?
Yes. In addition to deals on Montreal to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Montreal to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montreal to Illinois.
Can I find deals for business class flights from Montreal to Illinois?
Yes. Cheapflights offers flight deals from Montreal to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Montreal to Illinois?
Currently, April is the cheapest month in which you can book a flight from Montreal to Illinois (average of C$ 389). Flying from Montreal to Illinois in July is currently the most expensive (average of C$ 538). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

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Popular flights

Top destinations

Alternative routes for Montreal to Illinois

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Top 4 airlines flying from Montreal to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	CheapestC$ 229	AverageC$ 438	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
United Airlines	CheapestC$ 261	AverageC$ 539	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	CheapestC$ 267	AverageC$ 467	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	CheapestC$ 323	AverageC$ 599	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

How does Cheapflights help users find flights from Montreal to Illinois?

When you search for this flight from Montreal to Illinois, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Montreal to Illinois?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from Montreal.

Can Cheapflights find flights from Montreal to Illinois with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Montreal to Illinois, users can toggle the no change fees filter when performing a flight search.

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Cheap flights from Montreal to Illinois from C$ 252

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Montreal to Illinois

Cheapest flights from Montreal to IllinoisExplore the most affordable flight options available from Montreal to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2026.

Explore the most affordable flight options available from Montreal to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2026.

Best flights from Montreal to IllinoisDiscover carefully curated flight deals from Montreal to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Discover carefully curated flight deals from Montreal to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Direct flights from Montreal to IllinoisExplore direct flight options from Montreal to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 30 October 2026.

Explore direct flight options from Montreal to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 30 October 2026.

Last-minute flights from Montreal to IllinoisDiscover last-minute flight deals from Montreal to Illinois. Data last updated 30 October 2026 and is based on user searches.

Discover last-minute flight deals from Montreal to Illinois. Data last updated 30 October 2026 and is based on user searches.

One-way flights from Montreal to IllinoisSearch for one-way flight options from Montreal to Illinois. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

Search for one-way flight options from Montreal to Illinois. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

Find flight deals from Montreal to Illinois

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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

Best time to book a flight from Montreal to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Montreal with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from Montreal to Illinois?

What is the cheapest time of day to fly from YMQ to IL?

Find hourly flight availability from Montreal to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 October 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 58% on flights from Montreal to Illinois by exploring options for tickets in the evening.

How much does it cost to fly round-trip from Montreal to Illinois?

Airfare is below average for this route at the moment.

Montreal to Illinois flights typically cost between C$ 477 and C$ 603 in February.The cheapest round-trip price found within the last 5 days was C$ 400 on Porter Airlines (18 Feb-22 Feb).

How far ahead should I book a flight from Montreal to Illinois?

The best time to book flights from Montreal to Illinois is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

Read reviews from past customers who have flown Porter Airlines,Delta, andUnited Airlines from Montreal to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

How long is the flight from Montreal to Illinois?

What are the cheapest airlines to fly from Montreal to Illinois one-way?

What are the most popular routes from Montreal to Illinois?

What are the most reliable airlines from Montreal to Illinois?

What are the cheapest flights from Montreal to Illinois?

Can I find deals for flights from Montreal to Illinois that include hotel bookings?

How can I find direct flights from Montreal to Illinois?

Can I find deals for business class flights from Montreal to Illinois?

What is the cheapest month to book a flight from Montreal to Illinois?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Montreal to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Montreal to Illinois by cabin class

Find flights from Montreal to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Montreal and Illinois flights

Browse other Montreal and Illinois flight options. Last updated on 30 October 2026.

Popular flight searches

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Montreal to Illinois flights

Consider these flights travelling from Montreal to Illinois.

Top 4 airlines flying from Montreal to Illinois

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Cheapest flights from Montreal to Illinois
Explore the most affordable flight options available from Montreal to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2026.

Best flights from Montreal to Illinois
Discover carefully curated flight deals from Montreal to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Direct flights from Montreal to Illinois
Explore direct flight options from Montreal to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 30 October 2026.

Last-minute flights from Montreal to Illinois
Discover last-minute flight deals from Montreal to Illinois. Data last updated 30 October 2026 and is based on user searches.

One-way flights from Montreal to Illinois
Search for one-way flight options from Montreal to Illinois. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

Montreal to Illinois flights typically cost between C$ 477 and C$ 603 in February.
The cheapest round-trip price found within the last 5 days was C$ 400 on Porter Airlines (18 Feb-22 Feb).