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Cheap flights from Montreal to Chicago O'Hare Intl Airport from C$ 213

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 23/10. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
16 Oct — 23 Oct1
1 adult
1 adult, Economy

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 Friday or Thursday and return on a Thursday

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 16 September 2025.

Round-trip from

C$ 333

One-way from

C$ 213

Popular in

January

Cheapest in

August

Average price

C$ 530

Good round-trip deal

C$ 521 or less

Good one-way deal

C$ 450 or less
Air Canada
  • Air Canada
  • 29/10-5/11
  • Nonstop
  • 4h 50m total
  • Montreal to Chicago
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Air Canada
  • Air Canada
  • 23/10
  • Nonstop
  • 2h 42m total
  • Montreal to Chicago
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Highest demand for flights based on searches. 18% potential increase in price (C$ 161 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 September 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

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 16 September 2025.

Wed 29/106:15 p.m.YUL - ORD
Nonstop2h 45mAir Canada
Wed 5/117:15 a.m.ORD - YUL
Nonstop2h 05mAir Canada
Deal found 13/9C$ 333
Sat 1/116:15 p.m.YUL - ORD
Nonstop2h 45mAir Canada
Fri 7/1112:50 p.m.ORD - YUL
Nonstop2h 07mAir Canada
Deal found 15/9C$ 352
Thu 23/106:35 p.m.YUL - ORD
Nonstop2h 42mAir Canada
Sun 26/107:15 a.m.ORD - YUL
Nonstop2h 05mAir Canada
Deal found 14/9C$ 354
Fri 21/114:45 p.m.YUL - ORD
Nonstop3h 00mUnited Airlines
Thu 27/115:55 p.m.ORD - YUL
Nonstop2h 22mUnited Airlines
Deal found 15/9C$ 359
Fri 21/114:45 p.m.YUL - ORD
Nonstop3h 00mMultiple Airlines
Sun 30/117:15 a.m.ORD - YUL
Nonstop2h 05mMultiple Airlines
Deal found 16/9C$ 365
Thu 16/108:20 a.m.YUL - ORD
Nonstop2h 31mAir Canada
Sun 19/109:55 a.m.ORD - YUL
1 stop6h 25mAir Canada
Deal found 15/9C$ 367

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 16 September 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

Fri 28/11

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Sun 30/11

7:15 a.m.-10:20 a.m.

Nonstop2h 05m

C$ 359

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 23/11

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Sat 29/11

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

Nonstop2h 22m

C$ 359

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 23/11

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Thu 27/11

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

Nonstop2h 22m

C$ 359

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

Sat 29/11

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

Nonstop2h 22m

C$ 359

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 22/11

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Thu 27/11

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

Nonstop2h 22m

C$ 359

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 21/11

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Sat 29/11

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

Nonstop2h 22m

C$ 359

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 23/11

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Fri 28/11

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

Nonstop2h 22m

C$ 359

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

Fri 28/11

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

Nonstop2h 22m

C$ 359

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 23/10

9:15 a.m.-1:14 p.m.

1 stop4h 59m

Chicago O'Hare Intl

Sun 26/10

7:15 a.m.-10:20 a.m.

Nonstop2h 05m

C$ 373

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 30/11

8:00 a.m.-1:22 p.m.

1 stop4h 22m

C$ 381

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/9

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 12 September 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, January is the cheapest month in which you can book a flight from Montreal to Chicago O'Hare Intl Airport (average of C$ 261). Flying from Montreal to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 348). 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 16 September 2025.

It’s typically best to fly out from Montreal to Chicago O'Hare Intl Airport in the afternoon. Doing so could potentially save you 24% 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 14 September 2025.

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

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 16 September 2025.

The most flights from YMQ to ORD are scheduled on a Monday (31 on average). You will have fewer flight options on Saturday, 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?

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 16 September 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
8,924 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,924 reviews
United Airlines
7.4
Good
8,924 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,924 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,924 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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$ 359, United Airlines can have you in Chicago O'Hare Intl Airport from Montreal in 3h. There are 1199 km between Montreal and Chicago O'Hare Intl Airport. Most flights are nonstop.

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

    Currently priced at C$ 177, 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$ 259 and C$ 356, 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 Avianca (93%), ANA (93%) or Emirates (92%) 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$ 1,539, our data indicates the cheapest price to be C$ 249. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around C$ 359.

  • 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, January is the cheapest month in which you can book a flight from Montreal to Chicago O'Hare Intl Airport (average of C$ 261). Flying from Montreal to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 348). 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

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 16 September 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 177AverageC$ 413FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 259AverageC$ 521FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 356AverageC$ 489FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 452AverageC$ 596FlexibilityNo cancel feeOn-time60%
Search WestJet 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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