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Cheap flights from Montreal to Illinois from C$ 179

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
20 Apr — 27 Apr1
1 adult

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 15 April 2025.

Round-trip from

C$ 323

One-way from

C$ 179

Popular in

November

Cheapest in

March

Average price

C$ 494

Good round-trip deal

C$ 503 or less

Good one-way deal

C$ 337 or less
Air Canada
  • Air Canada
  • 8/5-11/5
  • 1 total stop
  • 9h 22m total
  • Montreal to Illinois
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Porter Airlines
  • Porter Airlines
  • 6/5
  • 1 total stop
  • 4h 14m total
  • Montreal to Illinois
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 44 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 April 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.
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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 15 April 2025.

Fri 9/51:10 p.m.YUL - MDW
1 stop4h 14mPorter Airlines
Mon 12/59:40 a.m.MDW - YUL
1 stop5h 20mPorter Airlines
Deal found 15/4C$ 321
Thu 8/51:00 p.m.YUL - ORD
1 stop6h 54mAir Canada
Sun 11/57:00 a.m.ORD - YUL
Nonstop2h 28mAir Canada
Deal found 15/4C$ 323
Thu 8/512:30 p.m.YUL - ORD
Nonstop2h 35mAmerican Airlines
Sun 11/56:17 a.m.ORD - YUL
1 stop9h 38mAmerican Airlines
Deal found 15/4C$ 346
Thu 8/56:00 a.m.YUL - MDW
1 stop3h 40mDelta
Sun 11/56:25 p.m.MDW - YUL
1 stop3h 51mDelta
Deal found 15/4C$ 350
Thu 8/55:00 p.m.YUL - ORD
1 stop6h 41mDelta
Sun 11/57:10 a.m.ORD - YUL
1 stop3h 50mDelta
Deal found 15/4C$ 360
Thu 8/59:45 a.m.YUL - ORD
Nonstop2h 47mUnited Airlines
Sun 11/57:00 a.m.ORD - YUL
Nonstop2h 28mUnited Airlines
Deal found 15/4C$ 384
Tue 13/52:30 p.m.YUL - ORD
2 stops17h 57mMultiple Airlines
Tue 20/59:08 p.m.ORD - YUL
2 stops24h 07mMultiple Airlines
Deal found 15/4C$ 416
Sun 15/66:45 p.m.YUL - MDW
1 stop28h 00mMultiple Airlines
Thu 19/65:20 p.m.MDW - YUL
1 stop3h 55mMultiple Airlines
Deal found 14/4C$ 428
Fri 9/56:45 a.m.YUL - STL
2 stops27h 30mMultiple Airlines
Fri 16/55:55 p.m.STL - YUL
1 stop19h 25mMultiple Airlines
Deal found 14/4C$ 458
Wed 14/57:00 a.m.YUL - ORD
1 stop15h 20mWestJet
Mon 19/57:59 p.m.ORD - YUL
1 stop20h 41mWestJet
Deal found 15/4C$ 464
Sat 17/57:00 a.m.YUL - MDW
1 stop15h 14mWestJet
Fri 30/59:20 a.m.MDW - YUL
2 stops14h 23mWestJet
Deal found 15/4C$ 466
Tue 29/412:30 p.m.YUL - STL
1 stop6h 32mAmerican Airlines
Wed 7/57:30 p.m.STL - YUL
1 stop15h 14mAmerican Airlines
Deal found 14/4C$ 576

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 15 April 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

Fri 9/5

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

1 stop4h 14m

Chicago Midway

Mon 12/5

9:40 a.m.-4:00 p.m.

1 stop5h 20m

C$ 321

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 8/5

1:00 p.m.-6:54 p.m.

1 stop6h 54m

Chicago O'Hare Intl

Sun 11/5

7:00 a.m.-10:28 a.m.

Nonstop2h 28m

C$ 323

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 8/5

6:00 a.m.-8:40 a.m.

1 stop3h 40m

Chicago Midway

Sun 11/5

6:25 p.m.-11:16 p.m.

1 stop3h 51m

C$ 350

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 8/5

5:00 p.m.-10:41 p.m.

1 stop6h 41m

Chicago O'Hare Intl

Sun 11/5

7:10 a.m.-12:00 p.m.

1 stop3h 50m

C$ 360

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 5/7

12:30 p.m.-2:05 p.m.

Nonstop2h 35m

Chicago O'Hare Intl

Sat 12/7

9:17 a.m.-10:44 p.m.

1 stop12h 27m

C$ 364

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 8/5

6:15 a.m.-8:02 a.m.

Nonstop2h 47m

Chicago O'Hare Intl

Sun 11/5

7:00 a.m.-10:28 a.m.

Nonstop2h 28m

C$ 384

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 13/5

2:30 p.m.-7:27 a.m.

2 stops17h 57m

Chicago O'Hare Intl

Tue 20/5

9:08 p.m.-10:15 p.m.

2 stops24h 07m

C$ 416

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sun 15/6

6:45 p.m.-9:45 p.m.

1 stop28h 00m

Chicago Midway

Thu 19/6

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

1 stop3h 55m

C$ 428

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 14/5

7:00 a.m.-9:20 p.m.

1 stop15h 20m

Chicago O'Hare Intl

Mon 19/5

7:59 p.m.-5:40 p.m.

1 stop20h 41m

C$ 452

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 9/5

6:45 a.m.-9:15 a.m.

2 stops27h 30m

Lambert-St Louis

Fri 16/5

5:55 p.m.-2:20 p.m.

1 stop19h 25m

C$ 458

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Showing 1-10 of 31 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, 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$ 355). 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 15 April 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 15 April 2025.

The most flights from YMQ to USIL are scheduled on a Tuesday (26 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

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.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

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).

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 15 April 2025.
Get a feel of what it's like to fly with Porter Airlines, Delta and United Airlines from Montreal to Illinois by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
281 reviews
Check prices

Comfort

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Reviews

1 / 17
10.0
Excellent

Anonymous,Dec 2024

YYZ - LAS

Everything about the rescheduled (cost me $180) flight great. ***Being denied boarding because I was few minutes under 1.5 hours was not. Stuck at the Kiosk for about 15 minutes before it directed me to the Porter counter was strange. Do not know why checking in online at home was not successful? I think something was up...what can you do?
Porter Airlines
8.0
Very good
281 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Comfort

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Reviews

1 / 17
10.0
Excellent

Anonymous,Dec 2024

YYZ - LAS

Everything about the rescheduled (cost me $180) flight great. ***Being denied boarding because I was few minutes under 1.5 hours was not. Stuck at the Kiosk for about 15 minutes before it directed me to the Porter counter was strange. Do not know why checking in online at home was not successful? I think something was up...what can you do?
Delta
8.0
Very good
7,917 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Comfort

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Reviews

1 / 17
10.0
Excellent

Anonymous,Dec 2024

YYZ - LAS

Everything about the rescheduled (cost me $180) flight great. ***Being denied boarding because I was few minutes under 1.5 hours was not. Stuck at the Kiosk for about 15 minutes before it directed me to the Porter counter was strange. Do not know why checking in online at home was not successful? I think something was up...what can you do?
United Airlines
7.4
Good
8,658 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Comfort

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Reviews

1 / 17
10.0
Excellent

Anonymous,Dec 2024

YYZ - LAS

Everything about the rescheduled (cost me $180) flight great. ***Being denied boarding because I was few minutes under 1.5 hours was not. Stuck at the Kiosk for about 15 minutes before it directed me to the Porter counter was strange. Do not know why checking in online at home was not successful? I think something was up...what can you do?
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Comfort

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Reviews

1 / 17
10.0
Excellent

Anonymous,Dec 2024

YYZ - LAS

Everything about the rescheduled (cost me $180) flight great. ***Being denied boarding because I was few minutes under 1.5 hours was not. Stuck at the Kiosk for about 15 minutes before it directed me to the Porter counter was strange. Do not know why checking in online at home was not successful? I think something was up...what can you do?
WestJet
7.2
Good
2,805 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Comfort

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Reviews

1 / 17
10.0
Excellent

Anonymous,Dec 2024

YYZ - LAS

Everything about the rescheduled (cost me $180) flight great. ***Being denied boarding because I was few minutes under 1.5 hours was not. Stuck at the Kiosk for about 15 minutes before it directed me to the Porter counter was strange. Do not know why checking in online at home was not successful? I think something was up...what can you do?

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.

  • 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$ 179), Air Canada (C$ 189), and American Airlines (C$ 213).

  • 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 Sun Country Air (100%), ANA (93%) or Emirates (93%) 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$ 226. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), you can expect to pay C$ 357 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$ 355). 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 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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 333AverageC$ 458FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 350AverageC$ 483FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 357AverageC$ 563FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 382AverageC$ 504FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 444AverageC$ 666FlexibilityNo 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.

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