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Cheap flights from Montreal to Chicago O'Hare Intl Airport from C$ 217

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 22/6. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
1 Jun — 8 Jun1
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 August, booked 79 days in advance, depart on a Thursday or Saturday and return on a Friday

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 2 May 2026.

Fri 29/56:30 p.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Sun 31/58:45 a.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Deal found 28/4C$ 364
Thu 21/56:30 p.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Mon 25/58:45 a.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Deal found 27/4C$ 371
Fri 22/56:30 p.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Sun 24/58:45 a.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Deal found 1/5C$ 377
Mon 15/61:15 p.m.
YUL
-
ORD
Nonstop2h 35m
Air Canada
Tue 23/68:35 a.m.
ORD
-
YUL
Nonstop2h 23m
Air Canada
Deal found 28/4C$ 379
Thu 21/51:15 p.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Sun 24/58:45 a.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Deal found 30/4C$ 380
Fri 29/56:30 p.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Sat 30/58:45 a.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Deal found 29/4C$ 384
Wed 27/56:30 p.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Sat 30/58:45 a.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Deal found 1/5C$ 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 2 May 2026.

Round-trip from

C$ 364

One-way from

C$ 217

Popular in

December

Cheapest in

November

Average price

C$ 504

Good round-trip deal

C$ 570 or less

Good one-way deal

C$ 367 or less
Air Canada
  • Air Canada
  • 29/5-31/5
  • Nonstop
  • 4h 53m total
  • Montreal to Chicago
Search Deals
Air Canada
  • Air Canada
  • 22/6
  • 1 total stop
  • 6h 46m total
  • Montreal to Chicago
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 49 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 May 2026
Search Deals
Price to beat on a round-trip flight from Montreal (YMQ) to Chicago O'Hare Intl.
Search Deals
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 2 May 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 - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 11/6

12:47 p.m.-4:26 p.m.

1 stop4h 39m

Chicago O'Hare Intl

Thu 18/6

1:46 p.m.-11:55 p.m.

1 stop9h 09m

C$ 417

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 30/5

12:40 p.m.-8:24 p.m.

1 stop8h 44m

Chicago O'Hare Intl

Mon 1/6

7:07 a.m.-5:43 p.m.

1 stop9h 36m

C$ 417

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 28/5

6:00 a.m.-1:01 p.m.

1 stop8h 01m

Chicago O'Hare Intl

Sun 31/5

3:47 p.m.-11:41 p.m.

1 stop6h 54m

C$ 418
Quickest round-trip

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 24/6

5:07 p.m.-8:31 p.m.

1 stop4h 24m

Chicago O'Hare Intl

Sat 27/6

11:15 a.m.-4:20 p.m.

1 stop4h 05m

C$ 432

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 27/9

10:35 a.m.-2:35 p.m.

1 stop5h 00m

Chicago O'Hare Intl

Sat 3/10

11:45 a.m.-6:10 p.m.

1 stop5h 25m

C$ 437

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 22/9

6:30 a.m.-11:00 a.m.

1 stop5h 30m

Chicago O'Hare Intl

Wed 30/9

3:20 p.m.-8:10 p.m.

1 stop3h 50m

C$ 437

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 27/9

10:35 a.m.-2:35 p.m.

1 stop5h 00m

Chicago O'Hare Intl

Fri 2/10

11:45 a.m.-6:10 p.m.

1 stop5h 25m

C$ 437

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 27/9

10:35 a.m.-2:35 p.m.

1 stop5h 00m

Chicago O'Hare Intl

Tue 6/10

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

1 stop4h 10m

C$ 437

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 21/7

6:47 p.m.-11:53 p.m.

1 stop6h 06m

Chicago O'Hare Intl

Fri 24/7

1:44 p.m.-11:52 p.m.

1 stop9h 08m

C$ 444

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 27/8

12:45 p.m.-6:41 p.m.

1 stop6h 56m

Chicago O'Hare Intl

Sun 30/8

8:55 a.m.-4:01 p.m.

1 stop6h 06m

C$ 501

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 23 resultsSorted by cheapest first
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3

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

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.

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

Currently, October is the cheapest month in which you can book a flight from Montreal to Chicago O'Hare Intl Airport (average of C$ 71). Flying from Montreal to Chicago O'Hare Intl Airport in December is currently the most expensive (average of C$ 248). 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 2 May 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 66% 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 2 May 2026.

The most flights from YMQ to ORD are scheduled on a Friday (28 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (26 on average).

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

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 2 May 2026.
See what other customers who have flown with United Airlines,American Airlines, andAir 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
9,679 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,679 reviews
United Airlines
7.4
Good
9,679 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
American Airlines
7.1
Good
11,679 reviews
United Airlines
7.4
Good
9,679 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,987 reviews
United Airlines
7.4
Good
9,679 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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$ 417, Delta can have you in Chicago O'Hare Intl Airport from Montreal in 4h 39m. 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$ 174, 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 Air Canada and United Airlines - these airlines can fly you to your destination from C$ 246 and C$ 254, respectively. These flights start at 63% 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 Japan Airlines (95%), Porter Airlines (89%) or Qatar Airways (87%) 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$ 680, our data indicates the cheapest price to be C$ 266. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around C$ 376.

  • 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, October is the cheapest month in which you can book a flight from Montreal to Chicago O'Hare Intl Airport (average of C$ 71). Flying from Montreal to Chicago O'Hare Intl Airport in December is currently the most expensive (average of C$ 248). 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
Evanston
Des Plaines
Skokie
Downers Grove
Elk Grove Village
Racine
Naperville
Bolingbrook
Romeoville
Schaumburg

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 2 May 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 174AverageC$ 358FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 246AverageC$ 508FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 254AverageC$ 486FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 289AverageC$ 499FlexibilityNo cancel feeOn-time52%
Search Porter Airlines 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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