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Cheap flights from Montreal to Illinois from C$ 199
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 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
3 Aug — 10 Aug1
Round-trip
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 29 July 2025.
Find flight deals from Montreal to Illinois
Cheapest flights from Montreal to IllinoisExplore 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 29 July 2025.
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 29 July 2025.
Thu 11/98:20 a.m.YUL - ORD
Nonstop2h 31mAir Canada
Thu 18/98:25 p.m.ORD - YUL
1 stop4h 25mAir Canada
Deal found 28/7C$ 237
Tue 26/85:29 p.m.YUL - ORD
Nonstop2h 36mAmerican Airlines
Mon 1/95:20 a.m.ORD - YUL
1 stop7h 19mAmerican Airlines
Deal found 27/7C$ 239
Fri 17/1010:45 a.m.YUL - MDW
1 stop6h 39mPorter Airlines
Sat 25/109:35 a.m.MDW - YUL
1 stop7h 20mPorter Airlines
Deal found 27/7C$ 240
Sat 30/88:15 a.m.YUL - ORD
2 stops10h 27mMultiple Airlines
Sun 31/88:10 a.m.ORD - YUL
Nonstop2h 26mMultiple Airlines
Deal found 27/7C$ 261
Wed 5/119:28 a.m.YUL - ORD
1 stop7h 43mDelta
Wed 12/1110:35 a.m.ORD - YUL
1 stop4h 25mDelta
Deal found 27/7C$ 296
Sat 30/86:00 a.m.YUL - MDW
1 stop7h 28mDelta
Wed 3/94:25 p.m.MDW - YUL
1 stop6h 28mDelta
Deal found 27/7C$ 296
Sat 23/84:55 p.m.YUL - ORD
Nonstop2h 46mUnited Airlines
Sat 30/86:00 p.m.ORD - YUL
Nonstop2h 29mUnited Airlines
Deal found 27/7C$ 362
Fri 10/1012:36 p.m.YUL - MDW
1 stop10h 38mMultiple Airlines
Sun 12/105:20 p.m.MDW - YUL
1 stop3h 55mMultiple Airlines
Deal found 27/7C$ 362
Thu 21/86:15 a.m.YUL - ORD
Nonstop2h 46mLufthansa
Sun 24/87:11 a.m.ORD - YUL
Nonstop2h 29mLufthansa
Deal found 28/7C$ 383
Wed 10/912:31 p.m.YUL - STL
1 stop9h 01mAmerican Airlines
Wed 17/97:23 a.m.STL - YUL
1 stop8h 10mAmerican Airlines
Deal found 27/7C$ 434
Thu 28/86:10 p.m.YUL - STL
Nonstop2h 50mAir Canada
Mon 1/91:30 p.m.STL - YUL
Nonstop2h 30mAir Canada
Deal found 27/7C$ 626
Wed 10/96:00 a.m.YUL - STL
2 stops11h 06mDelta
Wed 17/96:05 a.m.STL - YUL
1 stop9h 00mDelta
Deal found 28/7C$ 648
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 29 July 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 - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Thu 11/9
8:20 a.m.-9:51 a.m.
Nonstop2h 31m
Chicago O'Hare Intl
Thu 18/9
8:25 p.m.-1:50 a.m.
1 stop4h 25m
C$ 237
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Tue 26/8
5:29 p.m.-7:05 p.m.
Nonstop2h 36m
Chicago O'Hare Intl
Mon 1/9
5:20 a.m.-1:39 p.m.
1 stop7h 19m
C$ 239
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
Sat 25/10
9:35 a.m.-5:55 p.m.
1 stop7h 20m
C$ 240
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Sat 30/8
8:15 a.m.-5:42 p.m.
2 stops10h 27m
Chicago O'Hare Intl
Sun 31/8
8:10 a.m.-11:36 a.m.
Nonstop2h 26m
C$ 261
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Wed 10/9
6:00 a.m.-12:45 p.m.
1 stop7h 45m
Chicago O'Hare Intl
Tue 14/10
6:45 a.m.-5:34 p.m.
1 stop9h 49m
C$ 296
MontrealChicago
YUL - MDW
YULMDW
Montreal Pierre Elliott Trudeau Intl
Sat 30/8
6:00 a.m.-12:28 p.m.
1 stop7h 28m
Chicago Midway
Wed 3/9
4:25 p.m.-11:53 p.m.
1 stop6h 28m
C$ 296
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Tue 2/9
6:15 a.m.-8:01 a.m.
Nonstop2h 46m
Chicago O'Hare Intl
Tue 2/9
2:08 p.m.-5:26 p.m.
Nonstop2h 18m
C$ 359
MontrealChicago
YUL - MDW
YULMDW
Montreal Pierre Elliott Trudeau Intl
Fri 10/10
12:36 p.m.-10:14 p.m.
1 stop10h 38m
Chicago Midway
Sun 12/10
5:20 p.m.-10:15 p.m.
1 stop3h 55m
C$ 362
MontrealSt. Louis
YUL - STL
YULSTL
Montreal Pierre Elliott Trudeau Intl
Wed 10/9
12:31 p.m.-8:32 p.m.
1 stop9h 01m
Lambert-St Louis
Wed 17/9
7:23 a.m.-4:33 p.m.
1 stop8h 10m
C$ 434
MontrealSt. Louis
YUL - STL
YULSTL
Montreal Pierre Elliott Trudeau Intl
Thu 28/8
6:10 p.m.-8:00 p.m.
Nonstop2h 50m
Lambert-St Louis
Mon 1/9
1:30 p.m.-5:00 p.m.
Nonstop2h 30m
C$ 626
Showing 1-10 of 29 results
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$ 352). 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 29 July 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 29 July 2025.
The most flights from YMQ to USIL are scheduled on a Tuesday (31 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (29 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 29 July 2025.
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.
Boarding
8.2
Overall
8.0
Entertainment
7.0
Comfort
8.0
Crew
8.7
Food
7.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Jul 2025
LIS - YYZ
Boarding
8.2
Overall
8.0
Entertainment
7.0
Comfort
8.0
Crew
8.7
Food
7.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Jul 2025
LIS - YYZ
Boarding
8.2
Overall
8.0
Entertainment
7.0
Comfort
8.0
Crew
8.7
Food
7.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Jul 2025
LIS - YYZ
Boarding
8.2
Overall
8.0
Entertainment
7.0
Comfort
8.0
Crew
8.7
Food
7.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Jul 2025
LIS - YYZ
Boarding
8.2
Overall
8.0
Entertainment
7.0
Comfort
8.0
Crew
8.7
Food
7.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Jul 2025
LIS - YYZ
Boarding
8.2
Overall
8.0
Entertainment
7.0
Comfort
8.0
Crew
8.7
Food
7.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Jul 2025
LIS - YYZ
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.
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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.
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 29 July 2025.
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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.