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Cheap flights from Montreal to Chicago O'Hare Intl Airport from C$ 228

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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
16 Sep — 23 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to Chicago O'Hare Intl are usually found in November or March, booked 77 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap flight deals from Montreal to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest flights from Montreal to O'Hare Intl
Explore the most affordable flight options available from Montreal to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2026.

Thu 22/101:15 p.m. -
Nonstop2h 37m
Sun 25/107:25 a.m. -
1 stop5h 21m
Deal found 13/8C$ 368
Wed 9/98:45 a.m. -
1 stop5h 36m
Wed 23/92:00 p.m. -
1 stop6h 45m
Deal found 13/8C$ 369
Sat 5/96:30 p.m. -
Nonstop2h 35m
Sat 12/93:40 p.m. -
Nonstop2h 21m
Deal found 16/8C$ 370
Sat 10/102:30 p.m. -
1 stop6h 59m
Wed 14/102:00 p.m. -
1 stop6h 45m
Deal found 12/8C$ 372
Fri 4/92:35 p.m. -
1 stop7h 16m
Sun 6/98:40 a.m. -
Nonstop2h 19m
Deal found 12/8C$ 373
Thu 24/98:45 a.m. -
1 stop5h 36m
Sun 27/92:00 p.m. -
1 stop6h 45m
Deal found 13/8C$ 375
Tue 8/98:45 a.m. -
1 stop5h 36m
Tue 15/92:00 p.m. -
1 stop6h 45m
Deal found 12/8C$ 379
Thu 27/88:40 a.m. -
Nonstop2h 36m
Tue 1/98:40 a.m. -
Nonstop2h 19m
Deal found 13/8C$ 380
Fri 4/96:30 p.m. -
Nonstop2h 35m
Mon 7/98:40 a.m. -
Nonstop2h 19m
Deal found 13/8C$ 383
Tue 6/108:45 a.m. -
1 stop5h 34m
Sat 10/107:25 a.m. -
1 stop5h 20m
Deal found 13/8C$ 388

Find flight deals from Montreal to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Montreal (YMQ) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 August 2026.

Round-trip from

C$ 368

One-way from

C$ 228

Popular in

January

Cheapest in

November

Average price

C$ 504

Good round-trip deal

C$ 539 or less

Good one-way deal

C$ 361 or less
Air Canada
  • Air Canada
  • 22/10-25/10
  • 1 total stop
  • 7h 58m total
  • Montreal to Chicago
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Air Canada
  • Air Canada
  • 30/10
  • Nonstop
  • 2h 42m total
  • Montreal to Chicago
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 89 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
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Price to beat on a round-trip flight from Montreal (YMQ) to Chicago O'Hare Intl.
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Price to beat on a one-way flight from Montreal (YMQ) to Chicago O'Hare Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Montreal to O'Hare Intl 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 17 August 2026.
Use the filters below to find and compare flights from Montreal to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 4/9

6:30 p.m.-8:05 p.m.

Nonstop2h 35m

Chicago O'Hare Intl

Wed 9/9

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

Nonstop2h 15m

C$ 393
Quickest round-trip

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 22/10

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$ 420

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 25/9

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

Nonstop2h 36m

Chicago O'Hare Intl

Mon 28/9

7:11 a.m.-10:40 a.m.

Nonstop2h 29m

C$ 420

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

6:10 a.m.-7:51 a.m.

Nonstop2h 41m

Chicago O'Hare Intl

Mon 19/10

7:11 a.m.-10:40 a.m.

Nonstop2h 29m

C$ 420

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 15/9

9:30 a.m.-6:04 p.m.

1 stop9h 34m

Chicago O'Hare Intl

Thu 17/9

7:05 a.m.-4:19 p.m.

1 stop8h 14m

C$ 430

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 12/2

4:30 p.m.-8:21 p.m.

1 stop4h 51m

Chicago O'Hare Intl

Sun 14/2

3:45 p.m.-6:57 p.m.

Nonstop2h 12m

C$ 444

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 3/9

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

Nonstop2h 36m

Chicago O'Hare Intl

Mon 7/9

7:11 a.m.-10:40 a.m.

Nonstop2h 29m

C$ 449

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

2:46 p.m.-11:57 p.m.

1 stop10h 11m

Chicago O'Hare Intl

Sat 5/9

5:18 p.m.-11:30 p.m.

1 stop5h 12m

C$ 451

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 5/9

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

Nonstop2h 36m

Chicago O'Hare Intl

Sun 6/9

2:01 p.m.-5:30 p.m.

Nonstop2h 29m

C$ 451

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 1/9

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

Nonstop2h 36m

Chicago O'Hare Intl

Mon 7/9

7:11 a.m.-10:40 a.m.

Nonstop2h 29m

C$ 452

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 24 resultsSorted by cheapest first
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Best time to book a flight from Montreal to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl 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 Chicago O'Hare Intl Airport

What is the cheapest month to book a flight from Montreal to Chicago O'Hare Intl Airport?

Currently, April is the cheapest month in which you can book a flight from Montreal to Chicago O'Hare Intl Airport (average of C$ 395). Flying from Montreal to Chicago O'Hare Intl Airport in June is currently the most expensive (average of C$ 630). 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 ORD?

Find hourly flight availability from Montreal to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 August 2026.

It’s typically best to fly out from Montreal to Chicago O'Hare Intl Airport in the evening. Doing so could potentially save you 64% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from Montreal to Chicago O'Hare Intl Airport

Explore weekly flight availability from Montreal to O'Hare Intl. 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 17 August 2026.

The most flights from YMQ to ORD are scheduled on a Friday (33 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (30 on average).

How much does it cost to fly round-trip from Montreal to Chicago O'Hare Intl Airport?

Airfare is below average for this route at the moment.
Montreal to Chicago O'Hare Intl Airport flights typically cost between C$ 434 and C$ 682 in October.
The cheapest round-trip price found within the last 5 days was C$ 368 on Air Canada (22 Oct-25 Oct).

What’s the top layover airport for flights from Montreal to Chicago O'Hare Intl Airport?

Share of one-stop round-trip flights from Montreal to Chicago O'Hare Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YYZ) – chosen by Cheapflights users on 67% of one-stop itineraries from Montreal to Chicago O'Hare Intl Airport on Cheapflights.

What’s the cheapest layover airport for flights from Montreal to Chicago O'Hare Intl Airport?

Average round-trip fare for 1-stop flights from Montreal to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YTZ) is the most affordable 1-stop option, with an average round-trip price of C$ 327.

What’s the fastest layover option from Montreal to Chicago O'Hare Intl Airport?

Shortest average travel time for 1-stop one-way flights from Montreal to Chicago O'Hare Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Toronto (YTZ) have the shortest average one-way travel time for 1-stop routes: 5h 00m.

Which airport typically offers the quickest layover for flights from Montreal to Chicago O'Hare Intl Airport?

Average layover duration for 1-stop one-way flights from Montreal to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Toronto (YTZ) offer the fastest connection on this route, with an average layover time of 1h 18m.

How far ahead should I book a flight from Montreal to Chicago O'Hare Intl Airport?

The price you pay for your flight from Montreal to Chicago O'Hare Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 70 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated 17 August 2026.
See what other customers who have flown with United Airlines and Air Canada from Montreal to Chicago O'Hare Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,105 reviews
Check prices

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.7

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
United Airlines
7.4
Good
10,105 reviews
United Airlines
7.4
Good
10,105 reviews
Check prices

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.7

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
Air Canada
7.1
Good
11,479 reviews
United Airlines
7.4
Good
10,105 reviews
Check prices

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.7

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

Related info for your journey

Find useful and relevant information for your journey from Montreal to O'Hare Intl. 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 Chicago O'Hare Intl Airport?

    For as low as C$ 393, Air Canada can have you in Chicago O'Hare Intl Airport from Montreal in 2h 35m. There are 1199 km between Montreal and Chicago O'Hare Intl Airport. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Montreal to Chicago O'Hare Intl Airport round-trip?

    Currently priced at C$ 247, American Airlines will fly you from Montreal to Chicago O'Hare Intl Airport and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Porter Airlines and United Airlines - these airlines can fly you to your destination from C$ 249 and C$ 259, respectively. These flights start at 53% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Montreal to Chicago O'Hare Intl Airport?

    Consider Avianca (92%), ANA (86%) or Qatar Airways (84%) when booking your flight. These represent the most reliable airlines when flying from Montreal to Chicago O'Hare Intl Airport.

  • What are the cheapest flights from Montreal to Chicago O'Hare Intl Airport?

    Looking for the cheapest flight from Montreal to Chicago O'Hare Intl Airport? While on average our users pay C$ 4,349, our data indicates the cheapest price to be C$ 257. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around C$ 394.

  • Can I find deals for flights from Montreal to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Montreal to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montreal to O'Hare Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montreal to O'Hare Intl.

  • Can I find deals for business class flights from Montreal to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Montreal to O'Hare Intl 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 Chicago O'Hare Intl Airport?

    Currently, April is the cheapest month in which you can book a flight from Montreal to Chicago O'Hare Intl Airport (average of C$ 395). Flying from Montreal to Chicago O'Hare Intl Airport in June is currently the most expensive (average of C$ 630). 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

Travelling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Northbrook
Evanston
Des Plaines
Downers Grove
Racine
Rockford
Naperville
Schaumburg
Elk Grove Village
Skokie

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Montreal to O'Hare Intl

Discover the top 4 airlines that operate flights from Montreal to O'Hare Intl. 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 17 August 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 247AverageC$ 453FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Porter AirlinesCheapestC$ 249AverageC$ 465FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 259AverageC$ 504FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 285AverageC$ 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 O'Hare Intl?

Cheapflights helps you search for flights from Montreal to O'Hare Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Montreal to O'Hare Intl?

Cheapflights simply makes it quick and affordable to book flights from Montreal to O'Hare Intl by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Montreal to O'Hare Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Montreal to O'Hare Intl, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Montreal to O'Hare Intl become cheaper?

Not ready to book yet? You can track prices for flights from Montreal to O'Hare Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

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