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 most popular airlines that fly from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport?

Before booking your flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport check out the most popular airlines for this route: Air Canada, United Airlines or American Airlines.

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.

C$ 137+ Flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport

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

Airfare is below average for this route at the moment. Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport flights typically cost between C$ 443 and C$ 677 in February. The cheapest round-trip price found within the last 3 days was C$ 242 on Air Canada (23 Feb-25 Feb).

Q: Weekly flight availability from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport

The most flights from YUL to ORD are scheduled on a Monday (20 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (15 on average).

Cheapflights Tip: The best prices from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl are usually found in April or September, booked 65 days in advance, depart on a Thursday or Saturday and return on a Friday

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

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 4 February 2026.

Mon 23/26:25 p.m.

YUL

ORD

Nonstop2h 45m

Air Canada

Wed 25/212:50 p.m.

ORD

YUL

Nonstop2h 11m

Air Canada

Deal found 2/2C$ 242

Tue 24/26:25 p.m.

YUL

ORD

Nonstop2h 45m

Air Canada

Wed 4/33:35 p.m.

ORD

YUL

Nonstop2h 05m

Air Canada

Deal found 2/2C$ 243

Thu 26/36:00 a.m.

YUL

ORD

Nonstop3h 00m

United Airlines

Mon 30/31:00 p.m.

ORD

YUL

1 stop10h 13m

United Airlines

Deal found 4/2C$ 254

Tue 10/34:45 p.m.

YUL

ORD

Nonstop3h 00m

United Airlines

Tue 31/36:01 p.m.

ORD

YUL

1 stop5h 12m

United Airlines

Deal found 3/2C$ 255

Sat 21/37:00 a.m.

YUL

ORD

1 stop5h 58m

United Airlines

Sat 28/36:00 p.m.

ORD

YUL

Nonstop2h 17m

United Airlines

Deal found 4/2C$ 262

Thu 16/41:20 p.m.

YUL

ORD

Nonstop2h 35m

Air Canada

Mon 20/412:50 p.m.

ORD

YUL

Nonstop2h 15m

Air Canada

Deal found 2/2C$ 281

Tue 7/46:30 p.m.

YUL

ORD

Nonstop2h 35m

Air Canada

Sun 12/48:40 a.m.

ORD

YUL

Nonstop2h 11m

Air Canada

Deal found 3/2C$ 283

Mon 23/26:00 p.m.

YUL

ORD

1 stop6h 56m

Delta

Wed 25/25:25 a.m.

ORD

YUL

1 stop10h 28m

Delta

Deal found 2/2C$ 285

Thu 2/46:35 p.m.

YUL

ORD

1 stop6h 08m

United Airlines

Sun 5/42:00 p.m.

ORD

YUL

Nonstop2h 30m

United Airlines

Deal found 3/2C$ 290

Thu 16/47:00 a.m.

YUL

ORD

1 stop10h 42m

Delta

Fri 24/47:00 a.m.

ORD

YUL

1 stop3h 59m

Delta

Deal found 2/2C$ 296

Fri 8/56:45 p.m.

YUL

ORD

1 stop6h 14m

Delta

Sun 10/57:00 a.m.

ORD

YUL

1 stop8h 20m

Delta

Deal found 4/2C$ 298

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

Round-trip from	C$ 242
One-way from	C$ 137
Popular in	July
Cheapest in	April
Average price	C$ 481
Good round-trip deal	C$ 529 or less
Good one-way deal	C$ 305 or less

Air Canada
23/2-25/2
Nonstop
4h 56m total
Montreal to Chicago

Search Deals

Air Canada
23/4
Nonstop
2h 35m total
Montreal to Chicago

Search Deals

Highest demand for flights based on searches. 1% potential increase in price (C$ 9 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in February 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

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

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 10/3

2:13 p.m.-6:50 p.m.

1 stop5h 37m

Chicago O'Hare Intl

Tue 31/3

8:45 a.m.-2:40 p.m.

1 stop4h 55m

C$ 276

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 12/3

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

Nonstop3h 00m

Chicago O'Hare Intl

Sun 15/3

6:00 a.m.-3:16 p.m.

1 stop8h 16m

C$ 281

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 26/3

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

Nonstop3h 00m

Chicago O'Hare Intl

Mon 30/3

6:01 p.m.-9:26 p.m.

Nonstop2h 25m

C$ 281

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 16/4

6:45 p.m.-11:59 p.m.

1 stop6h 14m

Chicago O'Hare Intl

Thu 23/4

8:15 a.m.-5:35 p.m.

1 stop8h 20m

C$ 296

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 15/4

12:55 p.m.-4:18 p.m.

1 stop4h 23m

Chicago O'Hare Intl

Thu 23/4

1:36 p.m.-11:08 p.m.

1 stop8h 32m

C$ 296

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 16/4

6:45 p.m.-11:59 p.m.

1 stop6h 14m

Chicago O'Hare Intl

Sun 19/4

5:10 a.m.-11:38 a.m.

1 stop5h 28m

C$ 296

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 15/4

12:55 p.m.-4:18 p.m.

1 stop4h 23m

Chicago O'Hare Intl

Wed 22/4

9:35 a.m.-6:51 p.m.

1 stop8h 16m

C$ 296

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 17/4

12:44 p.m.-6:48 p.m.

1 stop7h 04m

Chicago O'Hare Intl

Thu 23/4

1:36 p.m.-11:08 p.m.

1 stop8h 32m

C$ 296

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 13/4

6:45 p.m.-11:59 p.m.

1 stop6h 14m

Chicago O'Hare Intl

Tue 21/4

5:04 p.m.-11:08 p.m.

1 stop5h 04m

C$ 296

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 14/4

7:00 a.m.-1:14 p.m.

1 stop7h 14m

Chicago O'Hare Intl

Tue 21/4

8:15 a.m.-5:35 p.m.

1 stop8h 20m

C$ 296

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/2

Showing 1-10 of 22 results

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.

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

Prices

Airlines

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

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, October 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 C$ 221). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 385). 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?

It’s optimal to fly from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport in the evening. By choosing this option you can save up to 66% on the cost of your flight, compared to a flight at noon.

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

Travelers seeking maximum savings on their Montreal Pierre Elliott Trudeau Intl Airport 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.

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

Reviews of airlines servicing O'Hare Intl

Check out reviews from past customers who have flown with Porter Airlines,United Airlines, andAmerican Airlines from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

7.9

Good

412 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Porter Airlines

7.9

Good

412 reviews

Porter Airlines

7.9

Good

412 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

United Airlines

7.4

Good

9,236 reviews

Porter Airlines

7.9

Good

412 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

American Airlines

7.2

Good

11,224 reviews

Porter Airlines

7.9

Good

412 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Air Canada

7.1

Good

10,688 reviews

Porter Airlines

7.9

Good

412 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Related info for your journey

How long is the flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport?
A quick flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport can take about 5h 37m. United Airlines provides one of the quickest options available for as low as C$ 276. There are 1199 km between Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport round-trip?
Currently priced at C$ 175, American Airlines will fly you from Montreal Pierre Elliott Trudeau Intl Airport 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$ 251 and C$ 262, respectively. American Airlines is priced at 63% lower than the current average price of a flight leaving 3 months from now.
What are the most reliable airlines from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport?
The top 3 most reliable airlines when flying from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport are Avianca (80%), ANA (79%) and Copa Airlines (73%).
What are the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport?
Looking for the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport? While on average our users pay C$ 1,682, our data indicates the cheapest price to be C$ 241. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around C$ 269.
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, October 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 C$ 221). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 385). 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

Evanston

Des Plaines

Skokie

Elk Grove Village

Downers Grove

Racine

Naperville

Bolingbrook

Romeoville

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to Illinois

Flights by cabin class

O'Hare Intl flight routes

Other flight options

Other flights from Pierre Elliott Trudeau Intl

Popular flights

Alternative routes for Pierre Elliott Trudeau Intl to O'Hare Intl

Pierre Elliott Trudeau Intl to Midway flights

Top 4 airlines flying from Pierre Elliott Trudeau Intl to O'Hare Intl

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	CheapestC$ 175	AverageC$ 360	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	CheapestC$ 251	AverageC$ 484	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 262	AverageC$ 499	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Porter Airlines	CheapestC$ 291	AverageC$ 502	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Pierre Elliott Trudeau Intl to O'Hare Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Pierre Elliott Trudeau Intl to O'Hare Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Pierre Elliott Trudeau Intl to O'Hare Intl?

Millions of users choose and trust Cheapflights to book the best flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl to O'Hare Intl become cheaper?

Not ready to book yet? You can track prices for flights from Pierre Elliott Trudeau Intl 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.

Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport from C$ 137

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 23/4. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheapest flights from Pierre Elliott Trudeau Intl to O'Hare IntlExplore 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 4 February 2026.

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 4 February 2026.

Best flights from Pierre Elliott Trudeau Intl to O'Hare IntlDiscover carefully curated flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 4 February 2026.

Discover carefully curated flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 4 February 2026.

Direct flights from Pierre Elliott Trudeau Intl to O'Hare IntlExplore direct flight options from Pierre Elliott Trudeau Intl to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 February 2026.

Explore direct flight options from Pierre Elliott Trudeau Intl to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 February 2026.

Last-minute flights from Pierre Elliott Trudeau Intl to O'Hare IntlDiscover last-minute flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl. Data last updated 4 February 2026 and is based on user searches.

Discover last-minute flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl. Data last updated 4 February 2026 and is based on user searches.

One-way flights from Pierre Elliott Trudeau Intl to O'Hare IntlSearch for one-way flight options from Pierre Elliott Trudeau Intl to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 4 February 2026.

Search for one-way flight options from Pierre Elliott Trudeau Intl to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 4 February 2026.

Find flight deals from Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport that are best for you.

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.

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?

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

What is the cheapest time of day to fly from YUL to ORD?

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

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

Weekly flight availability from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport

Reviews of airlines servicing O'Hare Intl

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?

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

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

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

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

How can I 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?

What is the cheapest month to book a flight from Montreal Pierre Elliott Trudeau Intl Airport 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

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

Alternative routes for Pierre Elliott Trudeau Intl to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.

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

Book a non-stop flight to one of these other cities located in Illinois.

Search flights from Pierre Elliott Trudeau Intl to O'Hare Intl by cabin class

Find flights from Pierre Elliott Trudeau Intl 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 4 February 2026.

Pierre Elliott Trudeau Intl and O'Hare Intl flights

Browse other Pierre Elliott Trudeau Intl and O'Hare Intl flight options. Last updated on 4 February 2026.

Other flights from Pierre Elliott Trudeau Intl

Browse through other flights departing from Pierre Elliott Trudeau Intl. Flights are based on user searches made on Cheapflights and were last updated on 4 February 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Top 4 airlines flying from Pierre Elliott Trudeau Intl to O'Hare Intl

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 Pierre Elliott Trudeau Intl to O'Hare Intl?

Why should you use Cheapflights to find cheap flight tickets from Pierre Elliott Trudeau Intl to O'Hare Intl?

Can Cheapflights find flights from Pierre Elliott Trudeau Intl to O'Hare Intl with no change fees?

Can Cheapflights notify me if prices for flights from Pierre Elliott Trudeau Intl to O'Hare Intl become cheaper?

100% Free

Book with Flexibility

Travel Smart

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 4 February 2026.

Best flights from Pierre Elliott Trudeau Intl to O'Hare Intl
Discover carefully curated flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 4 February 2026.

Direct flights from Pierre Elliott Trudeau Intl to O'Hare Intl
Explore direct flight options from Pierre Elliott Trudeau Intl to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 February 2026.

Last-minute flights from Pierre Elliott Trudeau Intl to O'Hare Intl
Discover last-minute flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl. Data last updated 4 February 2026 and is based on user searches.

One-way flights from Pierre Elliott Trudeau Intl to O'Hare Intl
Search for one-way flight options from Pierre Elliott Trudeau Intl to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 4 February 2026.