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Cheap flights from Montreal to Illinois from C$ 186

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
19 Mar — 26 Mar1
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 14 March 2025.

Round-trip from

C$ 348

One-way from

C$ 186

Popular in

November

Cheapest in

February

Average price

C$ 472

Good round-trip deal

C$ 608 or less

Good one-way deal

C$ 318 or less
Air Canada
  • Air Canada
  • 23/5-26/5
  • Nonstop
  • 4h 47m total
  • Montreal to Illinois
Search Deals
Porter Airlines
  • Porter Airlines
  • 21/4
  • 1 total stop
  • 6h 55m total
  • Montreal to Illinois
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 27 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 March 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 14 March 2025.

Fri 23/56:40 p.m.YUL - ORD
Nonstop2h 32mAir Canada
Mon 26/58:40 a.m.ORD - YUL
Nonstop2h 15mAir Canada
Deal found 13/3C$ 348
Thu 3/49:15 a.m.YUL - ORD
Nonstop2h 32mUnited Airlines
Sun 6/47:00 a.m.ORD - YUL
Nonstop2h 28mUnited Airlines
Deal found 13/3C$ 350
Fri 25/46:50 a.m.YUL - MDW
1 stop4h 30mPorter Airlines
Fri 2/59:15 a.m.MDW - YUL
1 stop5h 45mPorter Airlines
Deal found 13/3C$ 351
Sat 19/41:15 p.m.YUL - ORD
Nonstop2h 40mMultiple Airlines
Sat 26/42:00 p.m.ORD - YUL
1 stop5h 51mMultiple Airlines
Deal found 12/3C$ 357
Fri 4/47:05 a.m.YUL - MDW
1 stop6h 30mDelta
Tue 8/44:59 p.m.MDW - YUL
1 stop6h 00mDelta
Deal found 11/3C$ 393
Fri 18/46:00 p.m.YUL - ORD
1 stop6h 59mDelta
Sat 26/41:25 p.m.ORD - YUL
1 stop9h 03mDelta
Deal found 13/3C$ 418
Thu 10/412:30 p.m.YUL - ORD
Nonstop2h 35mAmerican Airlines
Sat 12/41:30 p.m.ORD - YUL
1 stop8h 14mAmerican Airlines
Deal found 13/3C$ 432
Sun 18/56:00 a.m.YUL - ORD
1 stop4h 51mWestJet
Thu 22/58:40 a.m.ORD - YUL
1 stop13h 39mWestJet
Deal found 13/3C$ 446
Sat 19/46:50 a.m.YUL - ORD
2 stops15h 13mPorter Airlines
Sun 20/47:20 a.m.ORD - YUL
Nonstop2h 16mPorter Airlines
Deal found 13/3C$ 458
Mon 21/411:50 a.m.YUL - MDW
1 stop5h 50mMultiple Airlines
Fri 25/411:15 a.m.MDW - YUL
1 stop12h 24mMultiple Airlines
Deal found 13/3C$ 471
Thu 1/56:10 p.m.YUL - STL
Nonstop2h 48mAir Canada
Sun 4/58:00 a.m.STL - YUL
1 stop4h 56mAir Canada
Deal found 13/3C$ 550
Sun 13/46:45 a.m.YUL - STL
2 stops11h 30mMultiple Airlines
Wed 16/44:57 p.m.STL - YUL
1 stop20h 43mMultiple Airlines
Deal found 13/3C$ 589

Find flights from Montreal to Illinois within your budget

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 14 March 2025.

Fly from

Montreal

Fly to

Illinois

Route

Depart

Return

Price

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 23/5

6:40 p.m.-8:12 p.m.

Nonstop2h 32m

Chicago O'Hare Intl

Mon 26/5

8:40 a.m.-11:55 a.m.

Nonstop2h 15m

C$ 348

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 3/4

9:15 a.m.-10:47 a.m.

Nonstop2h 32m

Chicago O'Hare Intl

Sun 6/4

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

Nonstop2h 28m

C$ 350

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Fri 25/4

6:50 a.m.-10:20 a.m.

1 stop4h 30m

Chicago Midway

Fri 2/5

9:15 a.m.-4:00 p.m.

1 stop5h 45m

C$ 351

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 19/4

1:15 p.m.-2:55 p.m.

Nonstop2h 40m

Chicago O'Hare Intl

Sat 26/4

2:00 p.m.-8:51 p.m.

1 stop5h 51m

C$ 357

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 19/4

3:06 p.m.-11:59 p.m.

1 stop9h 53m

Chicago O'Hare Intl

Sun 20/4

6:45 a.m.-11:58 a.m.

1 stop4h 13m

C$ 376

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 3/4

7:05 a.m.-12:35 p.m.

1 stop6h 30m

Chicago Midway

Mon 7/4

6:42 p.m.-11:28 p.m.

1 stop3h 46m

C$ 395

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 19/4

2:30 p.m.-9:21 p.m.

1 stop7h 51m

Chicago O'Hare Intl

Sun 20/4

8:25 a.m.-11:44 a.m.

Nonstop2h 19m

C$ 425

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Mon 21/4

11:50 a.m.-4:40 p.m.

1 stop5h 50m

Chicago Midway

Fri 25/4

11:15 a.m.-12:39 a.m.

1 stop12h 24m

C$ 471

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 1/5

6:10 p.m.-7:58 p.m.

Nonstop2h 48m

Lambert-St Louis

Sun 4/5

8:00 a.m.-1:56 p.m.

1 stop4h 56m

C$ 550

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sun 13/4

6:45 a.m.-5:15 p.m.

2 stops11h 30m

Lambert-St Louis

Wed 16/4

4:57 p.m.-2:40 p.m.

1 stop20h 43m

C$ 589

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/3

Showing 1-10 of 26 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.

Travel insights for flights from Montreal to Illinois

Get recent, data-driven insights about flights from Montreal to Illinois including ideal travel times, pricing trends, and more.

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 14 March 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 14 March 2025.

The most flights from YMQ to USIL are scheduled on a Wednesday (18 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (11 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 14 March 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
278 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.1

Crew

8.7

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
278 reviews
Porter Airlines
8.0
Very good
278 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.1

Crew

8.7

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
7,944 reviews
Porter Airlines
8.0
Very good
278 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.1

Crew

8.7

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
8,623 reviews
Porter Airlines
8.0
Very good
278 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.1

Crew

8.7

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
278 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.1

Crew

8.7

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
2,778 reviews
Porter Airlines
8.0
Very good
278 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.1

Crew

8.7

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$ 186), Air Canada (C$ 210), and United Airlines (C$ 229).

  • 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 (89%), Avianca (87%) or Copa Airlines (79%) 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$ 2,230, our data shows the cheapest flight currently is C$ 224. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), you can expect to pay C$ 331 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 6 airlines flying from Montreal to Illinois

Discover the top 6 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 14 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 342AverageC$ 474FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 363AverageC$ 504FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 373AverageC$ 495FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 379AverageC$ 602FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 396AverageC$ 544FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 459AverageC$ 624FlexibilityNo 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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