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Cheap flights from Montreal to Illinois from C$ 226

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/12. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
16 Jan — 23 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Montreal to Illinois

Enter your travel dates to find the best prices.

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 17 December 2025.

Sat 27/126:45 a.m.YUL - MDW
1 stop4h 20mPorter Airlines
Mon 23/211:00 a.m.MDW - YUL
1 stop4h 30mPorter Airlines
Deal found 15/12C$ 413
Wed 31/125:25 p.m.YUL - ORD
1 stop17h 19mUnited Airlines
Mon 5/17:00 a.m.ORD - YUL
1 stop4h 46mUnited Airlines
Deal found 16/12C$ 414
Tue 30/126:45 a.m.YUL - MDW
1 stop4h 20mPorter Airlines
Fri 2/14:15 p.m.MDW - YUL
1 stop5h 30mPorter Airlines
Deal found 15/12C$ 421
Wed 31/126:45 a.m.YUL - MDW
1 stop4h 20mPorter Airlines
Mon 5/14:15 p.m.MDW - YUL
1 stop5h 30mPorter Airlines
Deal found 15/12C$ 438
Wed 31/128:50 a.m.YUL - ORD
2 stops7h 20mAir Canada
Sat 3/18:40 p.m.ORD - YUL
1 stop4h 13mAir Canada
Deal found 16/12C$ 460
Tue 30/126:45 a.m.YUL - MDW
1 stop4h 20mPorter Airlines
Sat 3/14:15 p.m.MDW - YUL
1 stop5h 30mPorter Airlines
Deal found 16/12C$ 460
Mon 22/126:45 a.m.YUL - MDW
1 stop4h 20mPorter Airlines
Tue 6/111:00 a.m.MDW - YUL
1 stop5h 45mPorter Airlines
Deal found 15/12C$ 472
Sat 27/126:45 a.m.YUL - MDW
1 stop4h 20mPorter Airlines
Fri 2/14:15 p.m.MDW - YUL
1 stop5h 30mPorter Airlines
Deal found 15/12C$ 475
Mon 22/126:45 a.m.YUL - MDW
1 stop4h 20mPorter Airlines
Mon 5/14:15 p.m.MDW - YUL
1 stop5h 30mPorter Airlines
Deal found 15/12C$ 489
Wed 31/128:50 a.m.YUL - ORD
2 stops7h 20mAir Canada
Mon 5/18:45 p.m.ORD - YUL
1 stop4h 08mAir Canada
Deal found 16/12C$ 502
Wed 24/126:25 p.m.YUL - ORD
Nonstop2h 45mAir Canada
Wed 31/123:55 p.m.ORD - YUL
1 stop6h 27mAir Canada
Deal found 17/12C$ 530
Mon 15/1211:25 a.m.YUL - MDW
1 stop4h 55mPorter Airlines
Wed 17/1211:00 a.m.MDW - YUL
1 stop4h 30mPorter Airlines
Deal found 15/12C$ 533

Find flight deals from Montreal to Illinois

Keep the following information in mind while searching for Montreal to Illinois flight deals. Data was last updated 17 December 2025.

Round-trip from

C$ 259

One-way from

C$ 226

Popular in

December

Cheapest in

September

Average price

C$ 484

Good round-trip deal

C$ 618 or less

Good one-way deal

C$ 343 or less
Porter Airlines
  • Porter Airlines
  • 12/2-14/2
  • 2 total stops
  • 9h 20m total
  • Montreal to Illinois
Search Deals
Air Canada
  • Air Canada
  • 31/12
  • 2 total stops
  • 7h 20m total
  • Montreal to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montreal to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 17 December 2025.
Use the filters below to find and compare flights from Montreal to Illinois that are best for you.

Fly from

Montreal

Fly to

Illinois

Route

Depart

Return

Price

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 5/2

6:00 a.m.-8:05 a.m.

Nonstop3h 05m

Chicago O'Hare Intl

Sun 8/2

5:52 p.m.-9:17 p.m.

Nonstop2h 25m

C$ 260

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 6/2

9:15 a.m.-2:25 p.m.

1 stop6h 10m

Chicago O'Hare Intl

Mon 9/2

3:35 p.m.-9:42 p.m.

1 stop5h 07m

C$ 268

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sun 15/2

6:45 a.m.-10:05 a.m.

1 stop4h 20m

Chicago Midway

Sun 15/2

4:15 p.m.-10:45 p.m.

1 stop5h 30m

C$ 271

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 13/2

6:45 a.m.-10:05 a.m.

1 stop4h 20m

Chicago Midway

Fri 13/2

4:15 p.m.-10:45 p.m.

1 stop5h 30m

C$ 271

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 5/2

2:40 p.m.-9:43 p.m.

1 stop8h 03m

Chicago O'Hare Intl

Sat 7/2

5:35 p.m.-11:12 p.m.

1 stop4h 37m

C$ 297

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 14/2

12:52 p.m.-8:44 p.m.

1 stop8h 52m

Chicago O'Hare Intl

Tue 17/2

6:15 a.m.-1:40 p.m.

1 stop6h 25m

C$ 297

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 5/2

6:00 a.m.-1:13 p.m.

1 stop8h 13m

Chicago O'Hare Intl

Sun 8/2

5:35 p.m.-11:26 p.m.

1 stop4h 51m

C$ 297

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 5/2

12:50 p.m.-10:22 p.m.

1 stop10h 32m

Chicago Midway

Sat 7/2

1:26 p.m.-11:12 p.m.

1 stop8h 46m

C$ 297

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sat 14/2

6:00 a.m.-12:46 p.m.

1 stop7h 46m

Chicago Midway

Tue 17/2

6:00 a.m.-4:53 p.m.

1 stop9h 53m

C$ 297

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 10/4

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

1 stop6h 05m

Chicago Midway

Mon 13/4

11:00 a.m.-5:45 p.m.

1 stop5h 45m

C$ 303

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/12

Showing 1-10 of 55 results
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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.
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

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

Currently, September is the cheapest month in which you can book a flight from Montreal to Illinois (average of C$ 180). Flying from Montreal to Illinois in December is currently the most expensive (average of C$ 373). 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?

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 17 December 2025.

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.

What is the cheapest day to fly from Montreal to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Montreal to Illinois. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Montreal to Illinois flight should consider departing on Saturday afternoons when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Montreal to Illinois

Explore weekly flight availability from Montreal to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 December 2025.

The most flights from YMQ to USIL are scheduled on a Tuesday (20 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).

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

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 17 December 2025.
Read reviews from past customers who have flown Porter Airlines,United Airlines, andAmerican 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
399 reviews
Check prices

Crew

8.6

Overall

8.0

Food

7.6

Boarding

8.2

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
8.0
Very good
399 reviews
Porter Airlines
8.0
Very good
399 reviews
Check prices

Crew

8.6

Overall

8.0

Food

7.6

Boarding

8.2

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,092 reviews
Porter Airlines
8.0
Very good
399 reviews
Check prices

Crew

8.6

Overall

8.0

Food

7.6

Boarding

8.2

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
American Airlines
7.2
Good
11,049 reviews
Porter Airlines
8.0
Very good
399 reviews
Check prices

Crew

8.6

Overall

8.0

Food

7.6

Boarding

8.2

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,531 reviews
Porter Airlines
8.0
Very good
399 reviews
Check prices

Crew

8.6

Overall

8.0

Food

7.6

Boarding

8.2

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Related info for your journey

Find useful and relevant information for your journey from Montreal to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Montreal to Illinois?

    Airlines like United Airlines, Porter Airlines, and Delta fly from Montreal to Illinois in about 3h 05m. The time it takes to get you to your destination can typically vary by up to 4h 58m. 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 Porter Airlines (C$ 140), Air Canada (C$ 177), and United Airlines (C$ 216).

  • 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 Qatar Airways (88%), ANA (87%) or Qantas Airways (80%) 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$ 1,459, our data shows the cheapest flight currently is C$ 231. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), you can expect to pay C$ 242 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, September is the cheapest month in which you can book a flight from Montreal to Illinois (average of C$ 180). Flying from Montreal to Illinois in December is currently the most expensive (average of C$ 373). 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

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Alternative routes for Montreal to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Montreal to Illinois

Discover the top 4 airlines that operate flights from Montreal to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 17 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 196AverageC$ 532FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 202AverageC$ 370FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 256AverageC$ 505FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 264AverageC$ 494FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

Can Cheapflights notify me if prices for flights from Montreal to Illinois become cheaper?

Of course! You can now track prices for flights from Montreal to Illinois and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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