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Cheap flights from Montreal to Chicago O'Hare Intl Airport from C$ 235

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 22/11. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Montreal to Chicago O'Hare Intl are usually found in August or May, booked 75 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap 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 30 October 2025.

Round-trip from

C$ 323

One-way from

C$ 235

Popular in

January

Cheapest in

August

Average price

C$ 637

Good round-trip deal

C$ 617 or less

Good one-way deal

C$ 327 or less
United Airlines
  • United Airlines
  • 26/2-2/3
  • 2 total stops
  • 12h 47m total
  • Montreal to Chicago
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Air Canada
  • Air Canada
  • 22/11
  • 1 total stop
  • 4h 51m total
  • Montreal to Chicago
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Highest demand for flights based on searches. 19% potential increase in price (C$ 184 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 27 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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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Find 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 30 October 2025.

Thu 20/116:15 p.m.YUL - ORD
Nonstop2h 45mAir Canada
Mon 24/117:05 a.m.ORD - YUL
Nonstop2h 05mAir Canada
Deal found 29/10C$ 344
Sat 22/113:00 p.m.YUL - ORD
1 stop6h 07mUnited Airlines
Sat 2/511:15 a.m.ORD - YUL
1 stop5h 27mUnited Airlines
Deal found 29/10C$ 346
Mon 29/126:25 p.m.YUL - ORD
Nonstop2h 45mAir Canada
Sun 1/312:50 p.m.ORD - YUL
Nonstop2h 07mAir Canada
Deal found 28/10C$ 367
Thu 25/129:15 a.m.YUL - ORD
1 stop10h 04mUnited Airlines
Wed 25/26:00 a.m.ORD - YUL
1 stop6h 28mUnited Airlines
Deal found 28/10C$ 374
Sun 28/127:00 a.m.YUL - ORD
1 stop7h 01mAir Canada
Mon 2/312:50 p.m.ORD - YUL
Nonstop2h 07mAir Canada
Deal found 28/10C$ 376
Wed 3/129:25 a.m.YUL - ORD
Nonstop2h 53mAir Canada
Mon 8/127:05 a.m.ORD - YUL
Nonstop2h 05mAir Canada
Deal found 28/10C$ 381
Wed 19/114:45 p.m.YUL - ORD
Nonstop3h 00mUnited Airlines
Wed 26/115:55 p.m.ORD - YUL
Nonstop2h 22mUnited Airlines
Deal found 29/10C$ 383
Fri 28/118:50 a.m.YUL - ORD
2 stops7h 20mAir Canada
Fri 5/128:15 p.m.ORD - YUL
1 stop4h 38mAir Canada
Deal found 29/10C$ 387
Thu 20/119:25 a.m.YUL - ORD
Nonstop2h 53mAir Canada
Sun 23/118:00 a.m.ORD - YUL
1 stop6h 23mAir Canada
Deal found 29/10C$ 388
Tue 30/127:00 a.m.YUL - ORD
1 stop10h 19mDelta
Tue 3/37:10 a.m.ORD - YUL
1 stop8h 54mDelta
Deal found 28/10C$ 390
Sat 15/114:45 p.m.YUL - ORD
Nonstop3h 00mUnited Airlines
Sat 2/511:15 a.m.ORD - YUL
1 stop5h 27mUnited Airlines
Deal found 29/10C$ 395

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 30 October 2025.
Use the filters below to find and compare flights from Montreal to Chicago O'Hare Intl Airport that are best for you.

Fly from

Montreal

Fly to

O'Hare Intl

Route

Depart

Return

Price

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 26/2

8:30 a.m.-1:22 p.m.

1 stop5h 52m

Chicago O'Hare Intl

Mon 2/3

10:00 a.m.-5:55 p.m.

1 stop6h 55m

C$ 323

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 26/2

12:45 p.m.-6:57 p.m.

1 stop7h 12m

Chicago O'Hare Intl

Mon 2/3

7:00 a.m.-4:01 p.m.

1 stop8h 01m

C$ 327

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 20/3

9:25 a.m.-11:18 a.m.

Nonstop2h 53m

Chicago O'Hare Intl

Sun 29/3

7:55 a.m.-1:21 p.m.

1 stop4h 26m

C$ 348

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 4/4

6:00 a.m.-9:35 a.m.

1 stop4h 35m

Chicago O'Hare Intl

Wed 8/4

7:10 a.m.-5:04 p.m.

1 stop8h 54m

C$ 359

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 25/12

9:15 a.m.-6:19 p.m.

1 stop10h 04m

Chicago O'Hare Intl

Wed 25/2

6:00 a.m.-1:28 p.m.

1 stop6h 28m

C$ 374

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 25/11

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

Nonstop3h 00m

Chicago O'Hare Intl

Wed 26/11

5:55 p.m.-9:17 p.m.

Nonstop2h 22m

C$ 383

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 22/11

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

Nonstop3h 00m

Chicago O'Hare Intl

Sun 23/11

10:38 a.m.-2:00 p.m.

Nonstop2h 22m

C$ 383

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 21/11

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

Nonstop3h 00m

Chicago O'Hare Intl

Sun 23/11

10:38 a.m.-2:00 p.m.

Nonstop2h 22m

C$ 383

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 21/11

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

Nonstop3h 00m

Chicago O'Hare Intl

Wed 26/11

5:55 p.m.-9:17 p.m.

Nonstop2h 22m

C$ 383

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 21/12

6:25 p.m.-8:10 p.m.

Nonstop2h 45m

Chicago O'Hare Intl

Sun 4/1

12:50 p.m.-3:57 p.m.

Nonstop2h 07m

C$ 387

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/10

Showing 1-10 of 21 results
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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

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

Use this chart to determine the optimal time to book a round-trip flight from Montreal to O'Hare Intl. Price data was last updated on 24 October 2025.

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 75 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, November is the cheapest month in which you can book a flight from Montreal to Chicago O'Hare Intl Airport (average of C$ 212). Flying from Montreal to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 395). 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 30 October 2025.

It’s typically best to fly out from Montreal to Chicago O'Hare Intl Airport in the evening. Doing so could potentially save you 62% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Montreal to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Montreal to O'Hare Intl. Price data was last updated on 26 October 2025.

Travelers seeking maximum savings on their Montreal to Chicago O'Hare Intl Airport flight should consider departing on Saturday evenings when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 30 October 2025.
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
8,998 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
American Airlines
7.2
Good
11,030 reviews
United Airlines
7.4
Good
8,998 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Air Canada
7.1
Good
10,376 reviews
United Airlines
7.4
Good
8,998 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

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$ 348, United Airlines can have you in Chicago O'Hare Intl Airport from Montreal in 2h 53m. 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$ 179, 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 Porter Airlines - these airlines can fly you to your destination from C$ 262 and C$ 298, respectively. These flights start at 66% 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 Qatar Airways (97%), Qantas Airways (95%) or Emirates (93%) 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$ 1,404, our data indicates the cheapest price to be C$ 234. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around C$ 256.

  • 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, November is the cheapest month in which you can book a flight from Montreal to Chicago O'Hare Intl Airport (average of C$ 212). Flying from Montreal to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 395). 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
Elk Grove Village
Skokie
Downers Grove
Naperville
Bolingbrook
Romeoville

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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 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 179AverageC$ 456FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 262AverageC$ 520FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 298AverageC$ 559FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 375AverageC$ 508FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Montreal to O'Hare Intl?

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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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