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Cheap flights from Montreal to Illinois from C$ 243

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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
19 Jul — 26 Jul1
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 19 June 2026.

Tue 21/74:30 p.m.
YUL
-
ORD
1 stop4h 59m
Air Canada
Sat 25/77:25 a.m.
ORD
-
YUL
1 stop5h 22m
Air Canada
Deal found 18/6C$ 411
Fri 3/710:35 a.m.
YUL
-
MDW
1 stop5h 00m
Porter Airlines
Fri 10/73:20 p.m.
MDW
-
YUL
1 stop3h 50m
Porter Airlines
Deal found 15/6C$ 411
Mon 31/88:45 a.m.
YUL
-
ORD
1 stop5h 34m
Air Canada
Wed 9/97:25 a.m.
ORD
-
YUL
1 stop5h 20m
Air Canada
Deal found 15/6C$ 412
Thu 23/710:35 a.m.
YUL
-
MDW
1 stop5h 00m
Porter Airlines
Tue 28/73:20 p.m.
MDW
-
YUL
1 stop3h 50m
Porter Airlines
Deal found 16/6C$ 412
Fri 4/96:00 a.m.
YUL
-
ORD
1 stop8h 08m
Delta
Sat 5/95:18 p.m.
ORD
-
YUL
1 stop5h 12m
Delta
Deal found 16/6C$ 414
Fri 4/96:00 a.m.
YUL
-
MDW
1 stop4h 17m
Delta
Wed 9/95:45 p.m.
MDW
-
YUL
1 stop4h 42m
Delta
Deal found 15/6C$ 414
Sat 10/109:45 a.m.
YUL
-
ORD
Nonstop2h 36m
United Airlines
Wed 14/102:01 p.m.
ORD
-
YUL
Nonstop2h 29m
United Airlines
Deal found 16/6C$ 415
Tue 25/86:30 a.m.
YUL
-
MDW
1 stop9h 05m
Porter Airlines
Mon 31/83:15 p.m.
MDW
-
YUL
1 stop3h 55m
Porter Airlines
Deal found 16/6C$ 415
Fri 4/97:00 a.m.
YUL
-
ORD
1 stop7h 22m
Air Canada
Thu 10/93:40 p.m.
ORD
-
YUL
Nonstop2h 21m
Air Canada
Deal found 15/6C$ 417
Wed 15/710:35 a.m.
YUL
-
MDW
1 stop5h 00m
Porter Airlines
Sat 18/710:25 a.m.
MDW
-
YUL
1 stop6h 45m
Porter Airlines
Deal found 16/6C$ 417
Wed 1/74:30 p.m.
YUL
-
ORD
1 stop4h 59m
Air Canada
Sun 5/78:45 a.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Deal found 15/6C$ 418
Tue 21/710:35 a.m.
YUL
-
MDW
1 stop5h 00m
Porter Airlines
Thu 23/73:20 p.m.
MDW
-
YUL
1 stop5h 50m
Porter Airlines
Deal found 15/6C$ 418

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 19 June 2026.

Round-trip from

C$ 411

One-way from

C$ 243

Popular in

July

Cheapest in

April

Average price

C$ 470

Good round-trip deal

C$ 537 or less

Good one-way deal

C$ 388 or less
Air Canada
  • Air Canada
  • 21/7-25/7
  • 2 total stops
  • 10h 21m total
  • Montreal to Illinois
Search Deals
Air Canada
  • Air Canada
  • 7/7
  • 1 total stop
  • 4h 59m total
  • Montreal to Illinois
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 19 June 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

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 15/7

2:20 p.m.-11:31 p.m.

1 stop10h 11m

Chicago O'Hare Intl

Wed 22/7

2:00 p.m.-9:47 p.m.

1 stop6h 47m

C$ 426

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 6/7

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

1 stop8h 00m

Chicago O'Hare Intl

Tue 7/7

2:07 p.m.-11:25 p.m.

1 stop8h 18m

C$ 426

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 30/6

2:20 p.m.-11:31 p.m.

1 stop10h 11m

Chicago O'Hare Intl

Tue 7/7

8:45 a.m.-12:00 p.m.

Nonstop2h 15m

C$ 426

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Wed 1/7

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

1 stop7h 46m

Chicago Midway

Thu 9/7

1:18 p.m.-11:25 p.m.

1 stop9h 07m

C$ 426

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Mon 13/7

6:00 a.m.-9:13 a.m.

1 stop4h 13m

Chicago Midway

Mon 20/7

1:18 p.m.-11:25 p.m.

1 stop9h 07m

C$ 426

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Wed 16/9

6:00 a.m.-9:07 a.m.

1 stop4h 07m

Chicago Midway

Sat 19/9

9:30 a.m.-4:19 p.m.

1 stop5h 49m

C$ 433

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 20/9

6:00 a.m.-1:04 p.m.

1 stop8h 04m

Chicago O'Hare Intl

Tue 22/9

2:00 p.m.-11:22 p.m.

1 stop8h 22m

C$ 441

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 17/9

6:00 a.m.-12:34 p.m.

1 stop7h 34m

Chicago Midway

Sat 19/9

9:30 a.m.-4:19 p.m.

1 stop5h 49m

C$ 441

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 5/8

9:45 a.m.-11:20 a.m.

Nonstop2h 35m

Chicago O'Hare Intl

Mon 10/8

2:08 p.m.-5:30 p.m.

Nonstop2h 22m

C$ 445

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Wed 15/7

6:00 a.m.-9:13 a.m.

1 stop4h 13m

Chicago Midway

Fri 17/7

1:18 p.m.-11:25 p.m.

1 stop9h 07m

C$ 446

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/6

Showing 1-10 of 60 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, February is the cheapest month in which you can book a flight from Montreal to Illinois (average of C$ 72). Flying from Montreal to Illinois in January is currently the most expensive (average of C$ 189). 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 19 June 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 66% 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 19 June 2026.

The most flights from YMQ to USIL are scheduled on a Monday (33 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (25 on average).

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

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 19 June 2026.
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
438 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Porter Airlines
8.0
Very good
438 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
United Airlines
7.4
Good
9,860 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
American Airlines
7.1
Good
11,701 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Air Canada
7.1
Good
11,220 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.

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 Delta, United Airlines, and American Airlines fly from Montreal to Illinois in about 2h 35m. The time it takes to get you to your destination can typically vary by up to 10h 09m. 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 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 (93%), Qantas 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$ 1,414, our data shows the cheapest flight currently is C$ 266. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), you can expect to pay C$ 333 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, February is the cheapest month in which you can book a flight from Montreal to Illinois (average of C$ 72). Flying from Montreal to Illinois in January is currently the most expensive (average of C$ 189). 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.
Pierre Elliott Trudeau Intl to LaGuardia flights
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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 19 June 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 181AverageC$ 379FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Porter AirlinesCheapestC$ 207AverageC$ 434FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 264AverageC$ 490FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 265AverageC$ 566FlexibilityNo 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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