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$ 218+ Cheap 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$ 586 and C$ 380 in August. The cheapest round-trip price found within the last 3 days was C$ 327 on GOL (25 Aug-31 Aug).

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 (28 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (28 on average).

Cheapflights Tip: The best prices from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl are usually found in April or January, 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.

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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 5 May 2026.

Tue 16/64:30 p.m.

YUL

ORD

1 stop4h 46m

Air Canada

Tue 23/67:25 a.m.

ORD

YUL

1 stop5h 22m

Air Canada

Deal found 2/5C$ 374

Sat 16/56:30 p.m.

YUL

ORD

Nonstop2h 38m

Air Canada

Sun 17/58:45 a.m.

ORD

YUL

Nonstop2h 15m

Air Canada

Deal found 3/5C$ 377

Thu 21/58:40 a.m.

YUL

ORD

Nonstop2h 38m

Air Canada

Mon 25/58:45 a.m.

ORD

YUL

Nonstop2h 15m

Air Canada

Deal found 2/5C$ 378

Thu 21/58:40 a.m.

YUL

ORD

Nonstop2h 38m

Air Canada

Sun 24/58:45 a.m.

ORD

YUL

Nonstop2h 15m

Air Canada

Deal found 1/5C$ 381

Mon 21/910:35 a.m.

YUL

ORD

1 stop5h 00m

Porter Airlines

Mon 28/93:20 p.m.

ORD

YUL

1 stop5h 50m

Porter Airlines

Deal found 30/4C$ 385

Wed 27/51:15 p.m.

YUL

ORD

Nonstop2h 38m

Air Canada

Sun 31/58:45 a.m.

ORD

YUL

Nonstop2h 15m

Air Canada

Deal found 3/5C$ 390

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

Round-trip from	C$ 327
One-way from	C$ 218
Popular in	October
Cheapest in	April
Average price	C$ 512
Good round-trip deal	C$ 571 or less
Good one-way deal	C$ 368 or less

GOL
25/8-31/8
Nonstop
4h 50m total
Montreal to Chicago

Search Deals

Air Canada
22/6
1 total stop
6h 46m total
Montreal to Chicago

Search Deals

Highest demand for flights based on searches. 0% potential increase in price (C$ 4 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).

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Average for round-trip flights in May 2026

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Price to beat on a round-trip flight from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl.

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Price to beat on a one-way flight from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl.

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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

Cheapest round-trip

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 10/6

6:00 a.m.-1:04 p.m.

1 stop8h 04m

Chicago O'Hare Intl

Thu 11/6

5:22 p.m.-11:28 p.m.

1 stop5h 06m

C$ 418

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 27/9

10:35 a.m.-2:35 p.m.

1 stop5h 00m

Chicago O'Hare Intl

Fri 2/10

11:45 a.m.-6:10 p.m.

1 stop5h 25m

C$ 438

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 27/9

10:35 a.m.-2:35 p.m.

1 stop5h 00m

Chicago O'Hare Intl

Tue 6/10

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

1 stop4h 10m

C$ 438

Quickest round-trip

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 24/9

10:35 a.m.-2:35 p.m.

1 stop5h 00m

Chicago O'Hare Intl

Tue 6/10

3:20 p.m.-8:10 p.m.

1 stop3h 50m

C$ 438

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 25/7

5:10 p.m.-8:31 p.m.

1 stop4h 21m

Chicago O'Hare Intl

Mon 27/7

1:44 p.m.-11:52 p.m.

1 stop9h 08m

C$ 445

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 4/6

6:51 p.m.-11:59 p.m.

1 stop6h 08m

Chicago O'Hare Intl

Tue 9/6

8:08 a.m.-5:45 p.m.

1 stop8h 37m

C$ 461

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sun 24/5

9:30 a.m.-4:34 p.m.

1 stop8h 04m

Chicago O'Hare Intl

Tue 26/5

5:19 p.m.-11:13 p.m.

1 stop4h 54m

C$ 463

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 15/5

6:51 p.m.-11:59 p.m.

1 stop6h 08m

Chicago O'Hare Intl

Tue 19/5

5:41 p.m.-11:41 p.m.

1 stop5h 00m

C$ 464

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 30/5

7:00 a.m.-4:56 p.m.

1 stop10h 56m

Chicago O'Hare Intl

Thu 4/6

7:07 a.m.-5:43 p.m.

1 stop9h 36m

C$ 487

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 21/7

12:47 p.m.-8:31 p.m.

1 stop8h 44m

Chicago O'Hare Intl

Fri 31/7

1:44 p.m.-11:52 p.m.

1 stop9h 08m

C$ 488

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/4

Showing 1-10 of 22 resultsSorted by cheapest first

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 64 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, 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 C$ 389). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport in October is currently the most expensive (average of C$ 540). 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.

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

8.0

Very good

436 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

Porter Airlines

8.0

Very good

436 reviews

Porter Airlines

8.0

Very good

436 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

United Airlines

7.4

Good

9,683 reviews

Porter Airlines

8.0

Very good

436 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

American Airlines

7.1

Good

11,670 reviews

Porter Airlines

8.0

Very good

436 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

Air Canada

7.1

Good

10,999 reviews

Porter Airlines

8.0

Very good

436 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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. Delta provides one of the quickest options available for as low as C$ 438. 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$ 246 and C$ 254, respectively. American Airlines is priced at 62% 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 Emirates (100%), Japan Airlines (95%) and ANA (88%).
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$ 790, our data indicates the cheapest price to be C$ 253. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around C$ 389.
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 C$ 389). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport in October is currently the most expensive (average of C$ 540). 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.

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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$ 359	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	CheapestC$ 246	AverageC$ 509	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 254	AverageC$ 487	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Porter Airlines	CheapestC$ 290	AverageC$ 500	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights

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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.

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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.

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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport from C$ 218

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 22/6. 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 5 May 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 5 May 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 5 May 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 5 May 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 5 May 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 5 May 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 5 May 2026 and is based on user searches.

Discover last-minute flight deals from Pierre Elliott Trudeau Intl to O'Hare Intl. Data last updated 5 May 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 5 May 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 5 May 2026.

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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?

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?

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

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Other flights to O'Hare Intl

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Pierre Elliott Trudeau Intl and O'Hare Intl flights

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Browse through other flights departing from Pierre Elliott Trudeau Intl. Flights are based on user searches made on Cheapflights and were last updated on 5 May 2026.

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

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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 5 May 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 5 May 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 5 May 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 5 May 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 5 May 2026.