Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Montreal to Chicago O'Hare Intl Airport from C$ 189

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — ORD
21 Apr — 28 Apr1
1 adult

Cheapflights Tip: The best prices from Montreal to Chicago O'Hare Intl are usually found in May or April, booked 42 days in advance, depart on a Thursday or Friday and return on a Sunday

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 April 2025.

Round-trip from

C$ 320

One-way from

C$ 192

Popular in

January

Cheapest in

May

Average price

C$ 483

Good round-trip deal

C$ 503 or less

Good one-way deal

C$ 337 or less
Air Canada
  • Air Canada
  • 31/5-7/6
  • 2 total stops
  • 10h 45m total
  • Montreal to Chicago
Search Deals
Air Canada
  • Air Canada
  • 23/6
  • Nonstop
  • 2h 39m total
  • Montreal to Chicago
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 115 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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.
Search Deals

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 April 2025.

Sat 31/58:00 a.m.YUL - ORD
1 stop5h 55mAir Canada
Sat 7/63:50 p.m.ORD - YUL
1 stop4h 50mAir Canada
Deal found 15/4C$ 320
Sat 21/66:15 a.m.YUL - ORD
Nonstop2h 44mMultiple Airlines
Tue 24/62:16 p.m.ORD - YUL
1 stop6h 30mMultiple Airlines
Deal found 16/4C$ 341
Mon 19/56:00 a.m.YUL - ORD
1 stop7h 41mDelta
Tue 27/53:33 p.m.ORD - YUL
1 stop6h 46mDelta
Deal found 16/4C$ 359
Tue 20/58:05 a.m.YUL - ORD
1 stop9h 01mUnited Airlines
Tue 20/57:40 p.m.ORD - YUL
1 stop11h 08mUnited Airlines
Deal found 16/4C$ 382
Wed 27/812:30 p.m.YUL - ORD
Nonstop2h 35mAmerican Airlines
Fri 29/88:35 p.m.ORD - YUL
1 stop12h 39mAmerican Airlines
Deal found 16/4C$ 394
Wed 21/56:00 a.m.YUL - ORD
1 stop11h 30mWestJet
Fri 23/57:25 p.m.ORD - YUL
1 stop26h 51mWestJet
Deal found 16/4C$ 463

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 April 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

Sat 31/5

8:00 a.m.-12:55 p.m.

1 stop5h 55m

Chicago O'Hare Intl

Sat 7/6

3:50 p.m.-9:40 p.m.

1 stop4h 50m

C$ 320

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 8/5

12:30 p.m.-2:05 p.m.

Nonstop2h 35m

Chicago O'Hare Intl

Sun 11/5

6:17 a.m.-4:55 p.m.

1 stop9h 38m

C$ 346

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 8/5

5:00 p.m.-10:41 p.m.

1 stop6h 41m

Chicago O'Hare Intl

Sun 11/5

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

1 stop3h 50m

C$ 360

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 8/5

9:45 a.m.-11:32 a.m.

Nonstop2h 47m

Chicago O'Hare Intl

Sun 11/5

7:00 a.m.-10:28 a.m.

Nonstop2h 28m

C$ 384

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 13/5

2:30 p.m.-7:27 a.m.

2 stops17h 57m

Chicago O'Hare Intl

Tue 20/5

9:08 p.m.-10:15 p.m.

2 stops24h 07m

C$ 416

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 18/5

6:00 a.m.-6:37 p.m.

1 stop13h 37m

Chicago O'Hare Intl

Mon 19/5

7:59 p.m.-11:54 p.m.

1 stop26h 55m

C$ 451

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 6/5

1:00 p.m.-6:54 p.m.

1 stop6h 54m

C$ 189

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 13/5

6:45 a.m.-8:50 a.m.

2 stops27h 05m

C$ 210

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 13/5

12:30 p.m.-2:05 p.m.

Nonstop2h 35m

C$ 213

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 30/5

12:44 p.m.-9:20 p.m.

1 stop9h 36m

C$ 221

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Showing 1-10 of 12 results
1
2

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 11 April 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 42 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$ 355). 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 April 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 8% on the flight price compared to flying in the evening, 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 30 March 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 April 2025.

The most flights from YMQ to ORD are scheduled on a Tuesday (26 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

Rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.

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.

Temperature in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.

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).

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 April 2025.
Read through reviews of airlines operating flights from Montreal to Chicago, such as Delta, United Airlines and American Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,916 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,916 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,665 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
WestJet
7.2
Good
2,806 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.0
Good
9,134 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    Currently priced at C$ 320, Air Canada will fly you from Montreal to Chicago O'Hare Intl Airport and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Delta - these airlines can fly you to your destination from C$ 346 and C$ 359, respectively. These flights start at 42% 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$ 192 on Air Canada. Other airlines that offer cheap prices include American Airlines from C$ 211 and Delta from C$ 220 one-way.

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

    Consider Sun Country Air (100%), Emirates (93%) or ANA (91%) 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$ 1,320, our data indicates the cheapest price to be C$ 226. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around C$ 334.

  • 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$ 355). 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 Montreal?

Book flights to Montreal if you plan to visit one of these locations
Elk Grove Village
Evanston
Downers Grove
Skokie
Naperville
Bolingbrook
Romeoville

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Montreal to O'Hare Intl

Discover the top 5 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 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 336AverageC$ 488FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 350AverageC$ 483FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 357AverageC$ 563FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 382AverageC$ 504FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 444AverageC$ 666FlexibilityNo cancel feeOn-time60%
Search WestJet 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.