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Cheap flights from Montreal to Illinois from C$ 231

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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
2 Sep — 9 Sep1
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 3 August 2026.

Sat 22/86:30 p.m.
YUL
-
ORD
Nonstop2h 35m
Air Canada
Sun 23/88:40 a.m.
ORD
-
YUL
Nonstop2h 19m
Air Canada
Deal found 30/7C$ 371
Wed 2/96:30 a.m.
YUL
-
MDW
1 stop5h 30m
Porter Airlines
Tue 8/911:45 a.m.
MDW
-
YUL
1 stop5h 27m
Porter Airlines
Deal found 29/7C$ 371
Sun 6/910:35 a.m.
YUL
-
MDW
1 stop5h 00m
Porter Airlines
Sat 12/911:45 a.m.
MDW
-
YUL
1 stop5h 27m
Porter Airlines
Deal found 31/7C$ 373
Wed 9/99:00 a.m.
YUL
-
MDW
1 stop6h 35m
Porter Airlines
Thu 10/93:20 p.m.
MDW
-
YUL
1 stop4h 52m
Porter Airlines
Deal found 30/7C$ 374
Wed 14/106:30 a.m.
YUL
-
MDW
1 stop5h 30m
Porter Airlines
Tue 20/1011:45 a.m.
MDW
-
YUL
1 stop5h 27m
Porter Airlines
Deal found 1/8C$ 375
Wed 9/99:00 a.m.
YUL
-
MDW
1 stop6h 35m
Porter Airlines
Wed 16/911:45 a.m.
MDW
-
YUL
1 stop5h 27m
Porter Airlines
Deal found 30/7C$ 377
Wed 23/96:30 a.m.
YUL
-
MDW
1 stop5h 30m
Porter Airlines
Wed 30/911:45 a.m.
MDW
-
YUL
1 stop5h 27m
Porter Airlines
Deal found 29/7C$ 378
Fri 4/96:30 p.m.
YUL
-
ORD
Nonstop2h 35m
Air Canada
Mon 7/911:05 a.m.
ORD
-
YUL
Nonstop2h 19m
Air Canada
Deal found 1/8C$ 380
Sat 12/96:30 a.m.
YUL
-
MDW
1 stop5h 30m
Porter Airlines
Sat 19/911:45 a.m.
MDW
-
YUL
1 stop5h 27m
Porter Airlines
Deal found 29/7C$ 380
Fri 28/810:35 a.m.
YUL
-
MDW
1 stop5h 00m
Porter Airlines
Mon 31/83:15 p.m.
MDW
-
YUL
1 stop5h 55m
Porter Airlines
Deal found 2/8C$ 381
Sat 22/86:30 p.m.
YUL
-
ORD
Nonstop2h 35m
Air Canada
Tue 25/88:40 a.m.
ORD
-
YUL
Nonstop2h 19m
Air Canada
Deal found 2/8C$ 382
Sat 3/106:30 a.m.
YUL
-
MDW
1 stop5h 30m
Porter Airlines
Sun 4/103:20 p.m.
MDW
-
YUL
1 stop4h 52m
Porter Airlines
Deal found 29/7C$ 384

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 3 August 2026.

Round-trip from

C$ 371

One-way from

C$ 231

Popular in

July

Cheapest in

April

Average price

C$ 506

Good round-trip deal

C$ 547 or less

Good one-way deal

C$ 363 or less
Air Canada
  • Air Canada
  • 22/8-23/8
  • Nonstop
  • 4h 54m total
  • Montreal to Illinois
Search Deals
Air Canada
  • Air Canada
  • 18/8
  • 1 total stop
  • 5h 11m total
  • Montreal to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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

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 3 August 2026.
Use the filters below to find and compare flights from Montreal 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

Tue 20/10

9:45 a.m.-11:21 a.m.

Nonstop2h 36m

Chicago O'Hare Intl

Sun 25/10

7:05 a.m.-10:17 a.m.

Nonstop2h 12m

C$ 416

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Tue 15/9

6:30 a.m.-11:00 a.m.

1 stop5h 30m

Chicago Midway

Sat 19/9

11:45 a.m.-6:12 p.m.

1 stop5h 27m

C$ 418

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 6/9

9:45 a.m.-11:21 a.m.

Nonstop2h 36m

Chicago O'Hare Intl

Mon 7/9

8:40 a.m.-11:59 a.m.

Nonstop2h 19m

C$ 419

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sat 5/9

6:00 a.m.-9:17 a.m.

1 stop4h 17m

Chicago Midway

Wed 9/9

4:30 p.m.-11:50 p.m.

1 stop6h 20m

C$ 420

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 24/8

6:00 a.m.-1:08 p.m.

1 stop8h 08m

Chicago O'Hare Intl

Tue 25/8

1:50 p.m.-11:52 p.m.

1 stop9h 02m

C$ 422

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

6:00 a.m.-10:42 a.m.

1 stop5h 42m

Chicago O'Hare Intl

Sun 23/8

5:20 p.m.-11:30 p.m.

1 stop5h 10m

C$ 425

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Tue 3/11

6:00 a.m.-12:47 p.m.

1 stop7h 47m

Chicago Midway

Sat 7/11

12:27 p.m.-11:22 p.m.

1 stop9h 55m

C$ 425

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sun 23/8

7:00 a.m.-4:15 p.m.

1 stop10h 15m

Chicago Midway

Wed 26/8

12:46 p.m.-11:52 p.m.

1 stop10h 06m

C$ 425

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Wed 11/11

6:00 a.m.-9:42 a.m.

1 stop4h 42m

Chicago Midway

Wed 18/11

1:00 p.m.-11:58 p.m.

1 stop9h 58m

C$ 425

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sat 29/8

6:00 a.m.-12:39 p.m.

1 stop7h 39m

Chicago Midway

Sat 5/9

5:45 p.m.-11:30 p.m.

1 stop4h 45m

C$ 425

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 59 resultsSorted by cheapest first
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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, 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$ 541). 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 3 August 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 64% on flights from Montreal to Illinois by exploring options for tickets in the evening.

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 3 August 2026.

The most flights from YMQ to USIL are scheduled on a Friday (33 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (21 on average).

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$ 392 and C$ 579 in August.
The cheapest round-trip price found within the last 5 days was C$ 371 on Air Canada (22 Aug-23 Aug).

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

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 3 August 2026.
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
450 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Food

7.5

Crew

8.6

Boarding

8.2

Overall

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
450 reviews
Porter Airlines
8.0
Very good
450 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Food

7.5

Crew

8.6

Boarding

8.2

Overall

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Delta
7.8
Good
8,488 reviews
Porter Airlines
8.0
Very good
450 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Food

7.5

Crew

8.6

Boarding

8.2

Overall

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
United Airlines
7.4
Good
10,059 reviews
Porter Airlines
8.0
Very good
450 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Food

7.5

Crew

8.6

Boarding

8.2

Overall

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
American Airlines
7.1
Good
11,844 reviews
Porter Airlines
8.0
Very good
450 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Food

7.5

Crew

8.6

Boarding

8.2

Overall

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,419 reviews
Porter Airlines
8.0
Very good
450 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Food

7.5

Crew

8.6

Boarding

8.2

Overall

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

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, Delta, and Air Canada fly from Montreal to Illinois in about 2h 46m. The time it takes to get you to your destination can typically vary by up to 2h 44m. There are 1556 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$ 183), Porter Airlines (C$ 184), and American Airlines (C$ 234).

  • 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 (89%), Qantas Airways (89%) or Avianca (87%) 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$ 2,031, our data shows the cheapest flight currently is C$ 260. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), you can expect to pay C$ 394 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$ 541). 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 3 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 245AverageC$ 442FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 249AverageC$ 442FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 262AverageC$ 504FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 288AverageC$ 560FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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