How long is the flight from Montreal to Chicago O'Hare Intl Airport?

For as low as C$ 476, Delta can have you in Chicago O'Hare Intl Airport from Montreal in 3h 07m. 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$ 256, Porter Airlines will fly you from Montreal to Chicago O'Hare Intl Airport and back. In addition to Porter Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from C$ 266 and C$ 273, respectively. These flights start at 53% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Montreal to Chicago O'Hare Intl Airport one-way?

One-way options have recently been found by users for as low as C$ 238 on American Airlines. Other airlines that offer cheap prices include Air Canada from C$ 239 and United Airlines from C$ 265 one-way.

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, 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).

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$ 990, our data indicates the cheapest price to be C$ 307. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around C$ 421.

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

Consider ANA (84%), Avianca (79%) or Emirates (77%) when booking your flight. These represent the most reliable airlines when flying from Montreal to Chicago O'Hare Intl Airport.

What are the most popular airlines that fly from Montreal to Chicago O'Hare Intl Airport?

The most popular airlines flying from Montreal to Chicago O'Hare Intl Airport are Air Canada, United Airlines and American Airlines. Something to consider prior to booking your flight.

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.

C$ 254+ Cheap Flights from Montreal to Chicago O'Hare Intl Airport

Cheapflights Tip: The best prices from Montreal to Chicago O'Hare Intl are usually found in March or November, booked 85 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

Best

Direct

Last-minute

One-way

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 6 October 2026.

Fri 20/114:50 p.m. -

1 stop4h 27m

Fri 27/117:05 a.m. -

1 stop3h 47m

Deal found 6/10C$ 404

Fri 6/1111:10 a.m. -

1 stop5h 42m

Sun 15/117:05 a.m. -

Nonstop2h 12m

Deal found 3/10C$ 405

Wed 25/113:10 p.m. -

1 stop5h 48m

Sat 28/111:55 p.m. -

1 stop4h 51m

Deal found 5/10C$ 406

Thu 29/1011:10 a.m. -

1 stop5h 28m

Sun 1/111:55 p.m. -

1 stop6h 50m

Deal found 2/10C$ 409

Fri 6/1111:10 a.m. -

1 stop5h 42m

Mon 9/111:55 p.m. -

1 stop4h 51m

Deal found 4/10C$ 411

Thu 19/116:10 p.m. -

Nonstop2h 42m

Mon 23/111:55 p.m. -

1 stop4h 51m

Deal found 6/10C$ 415

Sun 22/116:00 a.m. -

1 stop5h 39m

Fri 27/112:44 p.m. -

1 stop4h 03m

Deal found 6/10C$ 418

Thu 5/116:10 p.m. -

Nonstop2h 42m

Mon 16/117:05 a.m. -

Nonstop2h 12m

Deal found 6/10C$ 419

Find flight deals from Montreal to O'Hare Intl

Round-trip from	C$ 404
One-way from	C$ 254
Popular in	January
Cheapest in	March
Average price	C$ 580
Good round-trip deal	C$ 541 or less
Good one-way deal	C$ 413 or less

KLM
20/11-27/11
2 total stops
8h 14m total
Montreal to Chicago

Search Deals

Delta
30/10-31/12
1 total stop
6h 07m total
Montreal to Chicago

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (C$ 79 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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

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 30/10

6:50 p.m.-11:57 p.m.

1 stop6h 07m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 254

MontrealChicago

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

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 3/11

9:30 a.m.-6:20 p.m.

1 stop9h 50m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 254

MontrealChicago

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

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 4/11

4:45 p.m.-6:46 p.m.

Nonstop3h 01m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 261

MontrealChicago

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

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 3/11

4:45 p.m.-6:46 p.m.

Nonstop3h 01m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 261

MontrealChicago

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

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 9/11

7:00 a.m.-4:21 p.m.

1 stop10h 21m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 284

MontrealChicago

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

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 2/11

3:00 p.m.-12:01 a.m.

1 stop10h 01m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 284

Quickest round-trip

MontrealChicago

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

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 6/1

4:45 p.m.-6:45 p.m.

Nonstop3h 00m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 311

MontrealChicago

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

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 7/1

4:45 p.m.-6:45 p.m.

Nonstop3h 00m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 311

MontrealChicago

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

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 19/10

9:30 a.m.-6:20 p.m.

1 stop9h 50m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 321

MontrealChicago

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

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 16/10

9:30 a.m.-6:20 p.m.

1 stop9h 50m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 324

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 24 resultsSorted by cheapest first

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.

YMQ-ORD

YUL-ORD

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

YMQ-ORD

YUL-ORD

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$ 406). Flying from Montreal to Chicago O'Hare Intl Airport in June is currently the most expensive (average of C$ 647). 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?

It’s typically best to fly out from Montreal to Chicago O'Hare Intl Airport in the evening. Doing so could potentially save you 60% 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

The most flights from YMQ to ORD are scheduled on a Monday (33 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (22 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$ 438 and C$ 697 in November.
The cheapest round-trip price found within the last 5 days was C$ 404 on KLM (20 Nov-27 Nov).

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

Toronto (YYZ) – chosen by Cheapflights users on 63% 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?

Toronto (YTZ) is the most affordable 1-stop option, with an average round-trip price of C$ 336.

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

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 81 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

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

10,287 reviews

Check prices

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

10,287 reviews

United Airlines

7.4

Good

10,287 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Air Canada

7.1

Good

11,729 reviews

United Airlines

7.4

Good

10,287 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Related info for your journey

How long is the flight from Montreal to Chicago O'Hare Intl Airport?
For as low as C$ 476, Delta can have you in Chicago O'Hare Intl Airport from Montreal in 3h 07m. 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$ 256, Porter Airlines will fly you from Montreal to Chicago O'Hare Intl Airport and back. In addition to Porter Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from C$ 266 and C$ 273, respectively. These flights start at 53% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Montreal to Chicago O'Hare Intl Airport one-way?
One-way options have recently been found by users for as low as C$ 238 on American Airlines. Other airlines that offer cheap prices include Air Canada from C$ 239 and United Airlines from C$ 265 one-way.
What are the most reliable airlines from Montreal to Chicago O'Hare Intl Airport?
Consider ANA (84%), Avianca (79%) or Emirates (77%) 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$ 990, our data indicates the cheapest price to be C$ 307. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around C$ 421.
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$ 406). Flying from Montreal to Chicago O'Hare Intl Airport in June is currently the most expensive (average of C$ 647). 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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Racine

Rockford

Naperville

Schaumburg

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Skokie

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Alternative routes

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O'Hare Intl flight routes

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Popular flights

Alternative routes for Montreal to O'Hare Intl

Pierre Elliott Trudeau Intl to O'Hare Intl flights

Pierre Elliott Trudeau Intl to Midway flights

Ottawa to O'Hare Intl flights

Québec City to O'Hare Intl flights

Ottawa to Midway flights

Québec City to Midway flights

Top 4 airlines flying from Montreal to O'Hare Intl

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	CheapestC$ 256	AverageC$ 478	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
United Airlines	CheapestC$ 266	AverageC$ 537	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	CheapestC$ 273	AverageC$ 480	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	CheapestC$ 330	AverageC$ 595	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

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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Cheap flights from Montreal to Chicago O'Hare Intl Airport from C$ 254

This is the cheapest round-trip 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.

Cheap flight deals from Montreal to O'Hare Intl

Cheapest flights from Montreal to O'Hare IntlExplore 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 6 October 2026.

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 6 October 2026.

Best flights from Montreal to O'Hare IntlDiscover carefully curated flight deals from Montreal to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 6 October 2026.

Discover carefully curated flight deals from Montreal to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 6 October 2026.

Direct flights from Montreal to O'Hare IntlExplore direct flight options from Montreal to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 6 October 2026.

Explore direct flight options from Montreal to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 6 October 2026.

Last-minute flights from Montreal to O'Hare IntlDiscover last-minute flight deals from Montreal to O'Hare Intl. Data last updated 6 October 2026 and is based on user searches.

Discover last-minute flight deals from Montreal to O'Hare Intl. Data last updated 6 October 2026 and is based on user searches.

One-way flights from Montreal to O'Hare IntlSearch for one-way flight options from Montreal to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 6 October 2026.

Search for one-way flight options from Montreal to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 6 October 2026.

Find flight deals from Montreal to O'Hare Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from Montreal to Chicago O'Hare Intl Airport that are best for you.

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.

Cheapflights Insights

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

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 6 October 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 60% 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 6 October 2026.

The most flights from YMQ to ORD are scheduled on a Monday (33 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (22 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$ 438 and C$ 697 in November.The cheapest round-trip price found within the last 5 days was C$ 404 on KLM (20 Nov-27 Nov).

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 63% 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$ 336.

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 81 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

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.

Related info for your journey

How long is the flight from Montreal to Chicago O'Hare Intl Airport?

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

What are the cheapest airlines to fly from Montreal to Chicago O'Hare Intl Airport one-way?

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

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

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Montreal to O'Hare Intl

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Complete your trip

Complete your trip to O'Hare Intl by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to Illinois

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Search flights from Montreal to O'Hare Intl by cabin class

Find flights from Montreal to O'Hare Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to O'Hare Intl

Explore flights to O'Hare Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 6 October 2026.

Montreal and O'Hare Intl flights

Browse other Montreal and O'Hare Intl flight options. Last updated on 6 October 2026.

Other flights from Montreal

Browse through other flights departing from Montreal. Flights are based on user searches made on Cheapflights and were last updated on 6 October 2026.

Popular flight searches

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 6 October 2026.

Best flights from Montreal to O'Hare Intl
Discover carefully curated flight deals from Montreal to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 6 October 2026.

Direct flights from Montreal to O'Hare Intl
Explore direct flight options from Montreal to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 6 October 2026.

Last-minute flights from Montreal to O'Hare Intl
Discover last-minute flight deals from Montreal to O'Hare Intl. Data last updated 6 October 2026 and is based on user searches.

One-way flights from Montreal to O'Hare Intl
Search for one-way flight options from Montreal to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 6 October 2026.

Montreal to Chicago O'Hare Intl Airport flights typically cost between C$ 438 and C$ 697 in November.
The cheapest round-trip price found within the last 5 days was C$ 404 on KLM (20 Nov-27 Nov).