HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
O'Hare Intl

$171+ Cheap flights from Pierre Elliott Trudeau Intl (YUL) to O'Hare Intl (ORD)

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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — ORD
Jul 23 — Jul 301
Thu 7/23
Thu 7/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Pierre Elliott Trudeau Intl to O'Hare Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl are usually found in April or January, booked 83 days in advance, depart on a Thursday or Friday and return on a Thursday

Cheap flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl

Cheapest flights from Pierre Elliott Trudeau Intl to O'Hare Intl
Explore the most affordable flight options available from Pierre Elliott Trudeau Intl to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2026.

This Air Canada deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/214:30 pm
YUL
-
ORD
1 stop4h 59m
Air Canada
Thu 7/238:45 am
ORD
-
YUL
Nonstop2h 15m
Air Canada
Deal found 6/23$290
This Air Canada deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/109:10 am
YUL
-
ORD
1 stop5h 13m
Air Canada
Wed 10/143:40 pm
ORD
-
YUL
Nonstop2h 21m
Air Canada
Deal found 6/23$291
This Air Canada deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/104:30 pm
YUL
-
ORD
1 stop4h 59m
Air Canada
Sun 7/128:45 am
ORD
-
YUL
Nonstop2h 15m
Air Canada
Deal found 6/21$293
This Flysmarter deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/94:30 pm
YUL
-
ORD
1 stop4h 59m
Air Canada
Sun 7/123:50 pm
ORD
-
YUL
1 stop5h 00m
Air Canada
Deal found 6/21$294
This Air Canada deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:40 am
YUL
-
ORD
Nonstop2h 36m
Air Canada
Thu 8/207:25 am
ORD
-
YUL
1 stop5h 22m
Air Canada
Deal found 6/20$295
This Gotogate deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:30 pm
YUL
-
ORD
Nonstop2h 35m
Air Canada
Tue 8/188:40 am
ORD
-
YUL
Nonstop2h 19m
Air Canada
Deal found 6/18$297
This Porter Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:30 am
YUL
-
ORD
1 stop5h 30m
Porter Airlines
Wed 9/233:20 pm
ORD
-
YUL
1 stop3h 50m
Porter Airlines
Deal found 6/18$299
This American Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:34 pm
YUL
-
ORD
Nonstop2h 45m
American Airlines
Sat 8/225:05 am
ORD
-
YUL
1 stop6h 41m
American Airlines
Deal found 6/19$300

Find flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Pierre Elliott Trudeau Intl (YUL) 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 June 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$290
(Air Canada)

One-way from

$171
(Air Canada)

Popular in

June

Cheapest in

April

Average price

$474

Good round-trip deal

$326 or less

Good one-way deal

$234 or less
Provider with most accurate pricing for Montreal Pierre Elliott Trudeau Intl-Chicago O'Hare Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Montreal Pierre Elliott Trudeau Intl-Chicago O'Hare Intl flights.
Search Deals
From Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl
Search Deals
One-way flight from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl.
Search Deals
Price to beat on a one-way flight from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pierre Elliott Trudeau Intl 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 2,558,603 searches. Data last updated June 23, 2026.
Use the filters below to find and compare flights from Montreal Pierre Elliott Trudeau Intl Airport 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

Sat 10/10

9:45 am-11:21 am

Nonstop2h 36m

Chicago O'Hare Intl

Wed 10/14

2:01 pm-5:30 pm

Nonstop2h 29m

$322

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 7/14

2:29 pm-10:36 pm

1 stop9h 07m

Chicago O'Hare Intl

Sat 7/18

2:31 pm-11:25 pm

1 stop7h 54m

$326

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 7/4

12:47 pm-8:31 pm

1 stop8h 44m

Chicago O'Hare Intl

Sun 7/5

1:40 pm-11:28 pm

1 stop8h 48m

$327

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 8/24

12:30 pm-2:09 pm

Nonstop2h 39m

Chicago O'Hare Intl

Thu 8/27

8:18 am-11:43 am

Nonstop2h 25m

$336

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 7/30

6:10 am-7:50 am

Nonstop2h 40m

Chicago O'Hare Intl

Sat 8/8

8:43 am-7:45 pm

1 stop10h 02m

$342

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 8/31

9:45 am-11:21 am

Nonstop2h 36m

Chicago O'Hare Intl

Tue 9/1

5:56 pm-9:26 pm

Nonstop2h 30m

$342
Quickest round-trip

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 7/16

6:10 am-7:50 am

Nonstop2h 40m

Chicago O'Hare Intl

Mon 7/20

2:08 pm-5:30 pm

Nonstop2h 22m

$342

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 9/7

6:10 am-7:51 am

Nonstop2h 41m

Chicago O'Hare Intl

Tue 9/15

7:11 am-10:40 am

Nonstop2h 29m

$343

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 7/9

9:45 am-11:20 am

Nonstop2h 35m

Chicago O'Hare Intl

Sun 7/12

7:10 am-10:40 am

Nonstop2h 30m

$343

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 9/16

9:45 am-11:21 am

Nonstop2h 36m

Chicago O'Hare Intl

Mon 9/21

2:01 pm-5:30 pm

Nonstop2h 29m

$343

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/23

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Pierre Elliott Trudeau Intl to O'Hare Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl in June.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Montreal Pierre Elliott Trudeau Intl Airport-Chicago O'Hare Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Montreal Pierre Elliott Trudeau Intl Airport-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Montreal Pierre Elliott Trudeau Intl Airport-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Montreal Pierre Elliott Trudeau Intl Airport-Chicago O'Hare Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Montreal Pierre Elliott Trudeau Intl Airport-Chicago O'Hare Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Pierre Elliott Trudeau Intl to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport

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

The best time to book flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport is 82 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, April is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport (average of $265). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport in June is currently the most expensive (average of $474). 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 YUL to ORD?

Find hourly flight availability from Pierre Elliott Trudeau Intl 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 June 23, 2026.

It’s optimal to fly from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport in the afternoon. By choosing this option you can save up to 48% on the cost of your flight, compared to a flight in the evening.

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

The best insider tips for Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport trip
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on ORD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
John Walton

John Walton

Expert on YUL

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more

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 June 23, 2026.
Read through reviews of airlines operating flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport, such as United Airlines,American Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,875 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

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
9,875 reviews
United Airlines
7.4
Good
9,875 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

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
11,746 reviews
United Airlines
7.4
Good
9,875 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

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
11,244 reviews
United Airlines
7.4
Good
9,875 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

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 Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport?

    Airlines like United Airlines, Delta, and American Airlines fly from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport in about 2h 36m. The time it takes to get you to your destination can typically vary by up to 6h 31m. Airlines will cover a distance of 745 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    According to our current data, Air Canada ($159), American Airlines ($189), and United Airlines ($240) offers the cheapest pricing from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport. Air Canada is currently priced 55% below the average price you’ll pay for this route.

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

    The cheapest airlines for a one-way flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport are Air Canada ($104), American Airlines ($149), and United Airlines ($156).

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport on time: ANA (93%), Qantas Airways (90%), Emirates (90%).

  • What are the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport?

    While on average a flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport is generally $755, our data shows the cheapest flight currently is $169. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), you can expect to pay $242 for that flight.

  • Can I find deals for flights from Pierre Elliott Trudeau Intl to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Pierre Elliott Trudeau Intl to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl to O'Hare Intl.

  • Can I find deals for business class flights from Pierre Elliott Trudeau Intl to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport?

    Currently, April is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport (average of $265). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport in June is currently the most expensive (average of $474). 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

Traveling 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
Benton Harbor
Rosemont
Schaumburg
Naperville
Lake Geneva
Gurnee
Delavan
Oakbrook Terrace
Downers Grove
Des Plaines
Oak Brook
South Holland
Libertyville
Hoffman Estates
Warrenville
Rockford
Racine
Great Lakes
Northbrook
Waukegan

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 3 airlines flying from Pierre Elliott Trudeau Intl to O'Hare Intl

Discover the top 3 airlines that operate flights from Pierre Elliott Trudeau Intl 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 2,558,603 searches. Data last updated June 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$159Average$322FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$189Average$399FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$240Average$402FlexibilityNo cancel feeOn-time69%

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.
Site
©2026 Cheapflights