Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Montreal to Illinois from C$ 176

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Montreal to Illinois

Keep the following information in mind while searching for Montreal to Illinois flight deals. Data was last updated 11 September 2025.

Round-trip from

C$ 290

One-way from

C$ 176

Popular in

November

Cheapest in

March

Average price

C$ 450

Good round-trip deal

C$ 518 or less

Good one-way deal

C$ 461 or less
Porter Airlines
  • Porter Airlines
  • 9/11-11/11
  • 2 total stops
  • 8h 50m total
  • Montreal to Illinois
Search Deals
Air Canada
  • Air Canada
  • 2/11
  • Nonstop
  • 2h 53m total
  • Montreal to Illinois
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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

Find flight deals from Montreal to Illinois

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 11 September 2025.

Sun 9/116:45 a.m.YUL - MDW
1 stop4h 20mPorter Airlines
Tue 11/1111:00 a.m.MDW - YUL
1 stop4h 30mPorter Airlines
Deal found 8/9C$ 290
Fri 17/101:10 p.m.YUL - MDW
1 stop4h 14mPorter Airlines
Mon 20/105:20 p.m.MDW - YUL
1 stop3h 55mPorter Airlines
Deal found 9/9C$ 291
Fri 21/1111:25 a.m.YUL - MDW
1 stop4h 55mPorter Airlines
Fri 28/1111:00 a.m.MDW - YUL
1 stop5h 45mPorter Airlines
Deal found 10/9C$ 292
Tue 7/101:10 p.m.YUL - MDW
1 stop4h 14mPorter Airlines
Wed 15/109:35 a.m.MDW - YUL
1 stop5h 25mPorter Airlines
Deal found 9/9C$ 297
Tue 7/1010:45 a.m.YUL - MDW
1 stop6h 39mPorter Airlines
Fri 24/105:20 p.m.MDW - YUL
1 stop3h 55mPorter Airlines
Deal found 9/9C$ 298
Thu 20/1111:25 a.m.YUL - MDW
1 stop4h 55mPorter Airlines
Thu 27/114:15 p.m.MDW - YUL
1 stop5h 30mPorter Airlines
Deal found 10/9C$ 299
Wed 8/1010:45 a.m.YUL - MDW
1 stop6h 39mPorter Airlines
Sun 12/105:20 p.m.MDW - YUL
1 stop3h 55mPorter Airlines
Deal found 10/9C$ 302
Sun 16/1111:25 a.m.YUL - MDW
1 stop4h 55mPorter Airlines
Tue 18/1111:00 a.m.MDW - YUL
1 stop4h 30mPorter Airlines
Deal found 8/9C$ 306
Wed 19/116:45 a.m.YUL - MDW
1 stop4h 20mPorter Airlines
Tue 9/1211:00 a.m.MDW - YUL
1 stop4h 30mPorter Airlines
Deal found 9/9C$ 309
Sun 9/119:25 a.m.YUL - ORD
Nonstop2h 53mAir Canada
Tue 11/1112:50 p.m.ORD - YUL
Nonstop2h 07mAir Canada
Deal found 8/9C$ 317
Thu 16/108:20 a.m.YUL - ORD
Nonstop2h 31mAir Canada
Sun 19/108:40 a.m.ORD - YUL
Nonstop2h 14mAir Canada
Deal found 9/9C$ 320
Tue 7/108:20 a.m.YUL - ORD
Nonstop2h 31mAir Canada
Sun 12/108:40 a.m.ORD - YUL
Nonstop2h 14mAir Canada
Deal found 9/9C$ 324

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 11 September 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 - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 2/10

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

1 stop6h 39m

Chicago Midway

Mon 6/10

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

1 stop3h 55m

C$ 298

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 21/11

11:25 a.m.-3:20 p.m.

1 stop4h 55m

Chicago Midway

Mon 24/11

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

1 stop4h 30m

C$ 315

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 2/10

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

1 stop6h 39m

Chicago Midway

Sun 5/10

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

1 stop3h 55m

C$ 327

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 17/10

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

1 stop6h 39m

Chicago Midway

Mon 20/10

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

1 stop3h 55m

C$ 328

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Wed 8/10

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

1 stop4h 14m

Chicago Midway

Thu 9/10

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

1 stop5h 25m

C$ 330

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 17/10

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

1 stop6h 39m

Chicago Midway

Tue 21/10

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

1 stop3h 55m

C$ 331

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

Wed 22/10

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

1 stop3h 55m

C$ 331

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 31/10

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

1 stop4h 20m

Chicago Midway

Sun 2/11

11:00 a.m.-6:45 p.m.

1 stop6h 45m

C$ 333

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 20/11

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

1 stop4h 20m

Chicago Midway

Thu 27/11

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

1 stop4h 30m

C$ 334

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Mon 13/10

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

1 stop6h 39m

Chicago Midway

Wed 15/10

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

1 stop3h 55m

C$ 352

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 59 results
1
2
3
...
6

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, January is the cheapest month in which you can book a flight from Montreal to Illinois (average of C$ 261). Flying from Montreal to Illinois in March is currently the most expensive (average of C$ 349). 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 11 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Montreal to Illinois as you normally would.

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 11 September 2025.

The most flights from YMQ to USIL are scheduled on a Wednesday (31 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).

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 11 September 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
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
7.9
Good
363 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,937 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
WestJet
7.2
Good
3,091 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

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 Porter Airlines, Air Canada, and Delta fly from Montreal to Illinois in about 6h 39m. The time it takes to get you to your destination can typically vary by up to 10m. There are 1196 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$ 182), Air Canada (C$ 200), and American Airlines (C$ 290).

  • 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 Qantas Airways (90%), Qatar Airways (90%) or Emirates (90%) 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$ 1,433, our data shows the cheapest flight currently is C$ 250. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), you can expect to pay C$ 346 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, January is the cheapest month in which you can book a flight from Montreal to Illinois (average of C$ 261). Flying from Montreal to Illinois in March is currently the most expensive (average of C$ 349). 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

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.
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to Newark flights
Pierre Elliott Trudeau Intl to Miami flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pierre Elliott Trudeau Intl to Orlando flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Ottawa to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Pierre Elliott Trudeau Intl to Dallas/Fort Worth flights
Ottawa to Newark flights
Québec City to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Reagan-National flights
Pierre Elliott Trudeau Intl to Boston flights
Pierre Elliott Trudeau Intl to Nashville flights
Pierre Elliott Trudeau Intl to Dulles Intl flights
Pierre Elliott Trudeau Intl to Seattle flights
Pierre Elliott Trudeau Intl to San Francisco flights
Pierre Elliott Trudeau Intl to Atlanta flights
Pierre Elliott Trudeau Intl to Hobby flights
Pierre Elliott Trudeau Intl to Honolulu flights
Pierre Elliott Trudeau Intl to Midway flights
Québec City to Newark flights
Pierre Elliott Trudeau Intl to West Palm Beach flights
Pierre Elliott Trudeau Intl to George Bush Intcntl flights
Québec City to Orlando flights
Pierre Elliott Trudeau Intl to Sky Harbor Intl flights
Ottawa to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Tampa flights
Pierre Elliott Trudeau Intl to Denver flights
Ottawa to LaGuardia flights
Pierre Elliott Trudeau Intl to Minneapolis flights
Ottawa to Orlando flights
Pierre Elliott Trudeau Intl to San Diego flights
Ottawa to Miami flights
Québec City to O'Hare Intl flights
Pierre Elliott Trudeau Intl to New Orleans flights
Ottawa to Dulles Intl flights
Pierre Elliott Trudeau Intl to Baltimore flights
Ottawa to Las Vegas flights
Pierre Elliott Trudeau Intl to Austin flights
Québec City to Miami flights
Ottawa to Reagan-National flights
Pierre Elliott Trudeau Intl to Ontario flights
Ottawa to Tampa flights
Québec City to John F Kennedy Intl flights
Ottawa to Los Angeles flights
Pierre Elliott Trudeau Intl to Kahului flights
Québec City to Las Vegas flights

Top 5 airlines flying from Montreal to Illinois

Discover the top 5 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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 178AverageC$ 414FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Porter AirlinesCheapestC$ 197AverageC$ 446FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 262AverageC$ 524FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 357AverageC$ 490FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 454AverageC$ 598FlexibilityNo cancel feeOn-time60%
Search WestJet 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.