In terms of precipitation, rainfall in Illinois 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 Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, 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 routes from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

The most popular route from Montreal Pierre Elliott Trudeau Intl Airport to Illinois is Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl. You may also consider Montreal Pierre Elliott Trudeau Intl - Chicago Midway or Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis.

What are the most reliable airlines from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

Consider ANA (85%), Avianca (85%) or Emirates (77%) when booking your flight. These represent the most reliable airlines when flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois.

What are the most popular airlines that fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

Air Canada, Porter Airlines and United Airlines are the most popular airlines when flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois.

How can I find direct flights from Pierre Elliott Trudeau Intl to Illinois?

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 Illinois.

Can I find deals for business class flights from Pierre Elliott Trudeau Intl to Illinois?

Yes. Cheapflights offers flight deals from Pierre Elliott Trudeau Intl to Illinois 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$ 230+ Cheap Flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

Cheap flight deals from Pierre Elliott Trudeau Intl to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Pierre Elliott Trudeau Intl to Illinois
Explore the most affordable flight options available from Pierre Elliott Trudeau Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2026.

Thu 1/105:00 a.m. -

1 stop5h 00m

Mon 5/102:00 p.m. -

1 stop4h 45m

Deal found 13/9C$ 392

Fri 23/108:35 a.m. -

2 stops5h 48m

Mon 26/101:55 p.m. -

1 stop6h 50m

Deal found 13/9C$ 393

Fri 2/106:30 a.m. -

1 stop5h 30m

Sun 4/1011:45 a.m. -

1 stop5h 27m

Deal found 13/9C$ 393

Sat 10/106:30 p.m. -

Nonstop2h 42m

Wed 14/108:45 a.m. -

Nonstop2h 15m

Deal found 16/9C$ 395

Thu 1/109:00 a.m. -

1 stop6h 35m

Mon 5/103:20 p.m. -

1 stop4h 52m

Deal found 15/9C$ 395

Wed 14/108:35 a.m. -

Nonstop2h 37m

Mon 19/108:45 a.m. -

Nonstop2h 15m

Deal found 14/9C$ 396

Sun 11/1010:35 a.m. -

1 stop5h 00m

Sun 18/1011:45 a.m. -

1 stop5h 27m

Deal found 13/9C$ 396

Thu 1/1011:10 a.m. -

1 stop4h 45m

Sun 4/102:00 p.m. -

1 stop4h 45m

Deal found 15/9C$ 397

Tue 29/96:30 a.m. -

1 stop5h 30m

Fri 2/103:20 p.m. -

1 stop4h 52m

Deal found 15/9C$ 397

Thu 12/113:10 p.m. -

1 stop5h 48m

Sun 15/111:55 p.m. -

1 stop4h 51m

Deal found 12/9C$ 399

Thu 1/106:30 a.m. -

1 stop5h 30m

Sun 4/103:20 p.m. -

1 stop4h 52m

Deal found 14/9C$ 399

Thu 29/101:10 p.m. -

Nonstop2h 42m

Thu 5/117:05 a.m. -

Nonstop2h 12m

Deal found 13/9C$ 400

Best flights from Pierre Elliott Trudeau Intl to Illinois
Discover carefully curated flight deals from Pierre Elliott Trudeau Intl to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Wed 14/1012:50 p.m. -

1 stop4h 42m

Sat 17/101:55 p.m. -

1 stop8h 30m

Deal found 14/9C$ 431

Thu 15/106:30 a.m. -

1 stop5h 30m

Sat 17/1011:45 a.m. -

1 stop5h 27m

Deal found 14/9C$ 437

Wed 14/109:45 a.m. -

Nonstop2h 36m

Wed 21/107:11 a.m. -

Nonstop2h 29m

Deal found 15/9C$ 467

Mon 28/96:10 p.m. -

1 stop5h 01m

Mon 5/108:45 a.m. -

Nonstop2h 15m

Deal found 12/9C$ 575

Fri 16/104:55 p.m. -

Nonstop2h 46m

Wed 21/1012:10 p.m. -

Nonstop2h 31m

Deal found 15/9C$ 781

Thu 15/106:00 a.m. -

1 stop5h 29m

Sat 17/105:42 p.m. -

1 stop4h 43m

Deal found 14/9C$ 431

Thu 1/109:00 a.m. -

1 stop6h 35m

Sun 4/1011:45 a.m. -

1 stop5h 27m

Deal found 11/9C$ 437

Thu 22/106:00 a.m. -

1 stop4h 32m

Tue 27/101:27 p.m. -

1 stop8h 58m

Deal found 15/9C$ 431

Tue 2/33:00 p.m. -

1 stop5h 52m

Wed 3/38:55 a.m. -

1 stop5h 07m

Deal found 16/9C$ 476

Tue 29/99:30 a.m. -

1 stop9h 34m

Fri 2/107:05 a.m. -

1 stop8h 14m

Deal found 15/9C$ 434

Thu 1/106:10 a.m. -

Nonstop2h 41m

Sun 4/105:56 p.m. -

Nonstop2h 30m

Deal found 11/9C$ 506

Sat 26/912:48 p.m. -

1 stop4h 26m

Sun 27/91:55 p.m. -

1 stop8h 32m

Deal found 12/9C$ 434

Wed 30/92:25 p.m. -

1 stop5h 50m

Wed 7/1010:05 a.m. -

1 stop7h 53m

Deal found 14/9C$ 434

Fri 20/116:00 a.m. -

1 stop7h 51m

Sun 22/111:31 p.m. -

1 stop8h 56m

Deal found 12/9C$ 434

Thu 29/106:00 a.m. -

1 stop7h 47m

Thu 5/111:27 p.m. -

1 stop8h 58m

Deal found 14/9C$ 434

Tue 9/26:00 a.m. -

1 stop7h 33m

Mon 15/25:59 p.m. -

1 stop4h 11m

Deal found 11/9C$ 434

Tue 27/106:00 a.m. -

1 stop7h 47m

Tue 3/111:27 p.m. -

1 stop8h 58m

Deal found 12/9C$ 434

Fri 23/103:25 p.m. -

1 stop6h 44m

Tue 27/109:40 a.m. -

2 stops11h 02m

Deal found 14/9C$ 795

Tue 24/116:00 a.m. -

1 stop4h 42m

Sun 29/111:31 p.m. -

1 stop8h 56m

Deal found 15/9C$ 448

Fri 2/106:00 a.m. -

1 stop6h 22m

Fri 16/107:30 a.m. -

1 stop7h 40m

Deal found 13/9C$ 795

Tue 27/107:00 a.m. -

2 stops9h 43m

Tue 3/118:00 a.m. -

1 stop6h 16m

Deal found 11/9C$ 795

Fri 23/106:00 a.m. -

1 stop7h 47m

Wed 28/101:27 p.m. -

1 stop8h 58m

Deal found 15/9C$ 478

Thu 8/106:10 a.m. -

1 stop16h 11m

Tue 13/109:04 a.m. -

1 stop7h 26m

Deal found 13/9C$ 795

Fri 23/106:00 a.m. -

1 stop7h 47m

Mon 26/106:44 p.m. -

1 stop3h 41m

Deal found 11/9C$ 481

Thu 15/104:55 p.m. -

1 stop7h 04m

Mon 19/1011:35 a.m. -

1 stop4h 55m

Deal found 13/9C$ 795

Fri 20/114:45 p.m. -

1 stop5h 55m

Sat 21/116:00 a.m. -

1 stop14h 42m

Deal found 13/9C$ 795

Thu 8/106:00 a.m. -

1 stop7h 59m

Mon 12/101:55 p.m. -

1 stop8h 30m

Deal found 15/9C$ 563

Tue 17/119:40 a.m. -

2 stops11h 49m

Sun 22/112:21 p.m. -

1 stop8h 06m

Deal found 15/9C$ 738

Tue 13/106:00 a.m. -

1 stop4h 49m

Tue 20/105:35 p.m. -

2 stops13h 57m

Deal found 15/9C$ 738

Thu 15/107:50 p.m. -

1 stop16h 57m

Mon 19/105:31 p.m. -

1 stop14h 01m

Deal found 15/9C$ 782

Find flight deals from Pierre Elliott Trudeau Intl to Illinois

Round-trip from	C$ 392
One-way from	C$ 230
Popular in	July
Cheapest in	April
Average price	C$ 416
Good round-trip deal	C$ 545 or less
Good one-way deal	C$ 370 or less

Air Canada
1/10-5/10
2 total stops
9h 45m total
Montreal to Illinois

Search Deals

Air Canada
30/9-31/12
Nonstop
2h 37m total
Montreal to Illinois

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (C$ 76 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Price to beat on a round-trip flight from Montreal Pierre Elliott Trudeau Intl to Illinois.

Search Deals

Price to beat on a one-way flight from Montreal Pierre Elliott Trudeau Intl to Illinois.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - MDW Chicago Midway

YULMDW

Montreal Pierre Elliott Trudeau Intl

Wed 7/10

6:30 a.m.-11:00 a.m.

1 stop5h 30m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 251

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 12/3

12:45 p.m.-8:37 p.m.

1 stop8h 52m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 257

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - MDW Chicago Midway

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 7/1

6:00 a.m.-12:33 p.m.

1 stop7h 33m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 257

Quickest round-trip

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 26/9

9:45 a.m.-11:21 a.m.

Nonstop2h 36m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 258

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 13/10

6:00 a.m.-12:59 p.m.

1 stop7h 59m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 258

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 14/10

6:00 a.m.-12:59 p.m.

1 stop7h 59m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 258

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 28/10

6:00 a.m.-12:59 p.m.

1 stop7h 59m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 258

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 6/10

6:00 a.m.-12:59 p.m.

1 stop7h 59m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 258

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 7/10

9:30 a.m.-6:20 p.m.

1 stop9h 50m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 258

MontrealChicago

YUL Montreal Pierre Elliott Trudeau Intl - ORD Chicago O'Hare Intl

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 12/10

6:00 a.m.-12:59 p.m.

1 stop7h 59m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 258

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from Pierre Elliott Trudeau Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Pierre Elliott Trudeau Intl with our price prediction graph.

YUL-ORD

YUL-MDW

YUL-STL

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 Illinois

YUL-USIL

YUL-ORD

YUL-MDW

YUL-STL

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

Currently, April is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois (average of C$ 384). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois in September is currently the most expensive (average of C$ 561). 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 IL?

A simple way to save on the total cost of your ticket is to fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois in the evening. If you’re flexible enough to do this you can expect to save up to 62% on your trip compared to booking a flight at noon.

Weekly flight availability from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

The most flights from YUL to USIL are scheduled on a Tuesday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (26 on average).

How much does it cost to fly round-trip from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

Airfare is below average for this route at the moment.

Montreal Pierre Elliott Trudeau Intl Airport to Illinois flights typically cost between C$ 406 and C$ 643 in October.
The cheapest round-trip price found within the last 5 days was C$ 392 on Air Canada (1 Oct-5 Oct).

How far ahead should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

The price you pay for your flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 87 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Illinois

Check out reviews from past customers who have flown with Porter Airlines,United Airlines, andAmerican Airlines from Montreal Pierre Elliott Trudeau Intl Airport to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

462 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.

Porter Airlines

8.0

Very good

462 reviews

Porter Airlines

8.0

Very good

462 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

United Airlines

7.4

Good

10,214 reviews

Porter Airlines

8.0

Very good

462 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

American Airlines

7.1

Good

12,076 reviews

Porter Airlines

8.0

Very good

462 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

Air Canada

7.1

Good

11,640 reviews

Porter Airlines

8.0

Very good

462 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

D,Sep 2026

YHM - YVR

Related info for your journey

How long is the flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?
A quick flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois can take about 2h 46m. Delta provides one of the quickest options available for as low as C$ 781. The distance between Montreal Pierre Elliott Trudeau Intl Airport and Illinois is about 1556 km. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines to fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois one-way?
The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as C$ 182. However, be on the lookout for offers from Porter Airlines and American Airlines, as they are both options that can get you from Montreal Pierre Elliott Trudeau Intl Airport to Illinois for a low price.
What are the most popular routes from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?
The most popular route from Montreal Pierre Elliott Trudeau Intl Airport to Illinois is Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl. You may also consider Montreal Pierre Elliott Trudeau Intl - Chicago Midway or Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis.
What are the most reliable airlines from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?
Consider ANA (85%), Avianca (85%) or Emirates (77%) when booking your flight. These represent the most reliable airlines when flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois.
What are the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?
Looking at all options, your cheapest flight can be booked for C$ 286. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl) can be booked for C$ 388 on average, our data indicates C$ 2,333 when flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois.
Can I find deals for flights from Pierre Elliott Trudeau Intl to Illinois that include hotel bookings?
Yes. In addition to deals on Pierre Elliott Trudeau Intl to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Pierre Elliott Trudeau Intl to Illinois?
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 Illinois.
Can I find deals for business class flights from Pierre Elliott Trudeau Intl to Illinois?
Yes. Cheapflights offers flight deals from Pierre Elliott Trudeau Intl to Illinois 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 Illinois?
Currently, April is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois (average of C$ 384). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois in September is currently the most expensive (average of C$ 561). 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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Top 4 airlines flying from Pierre Elliott Trudeau Intl to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	CheapestC$ 244	AverageC$ 462	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
United Airlines	CheapestC$ 260	AverageC$ 525	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	CheapestC$ 267	AverageC$ 469	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	CheapestC$ 325	AverageC$ 580	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

How does Cheapflights help users find flights from Pierre Elliott Trudeau Intl to Illinois?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Illinois from Pierre Elliott Trudeau Intl today with Cheapflights!

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from Pierre Elliott Trudeau Intl.

Can Cheapflights find flights from Pierre Elliott Trudeau Intl to Illinois 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 Illinois, 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 Illinois become cheaper?

Not ready to book yet? You can track prices for flights from Pierre Elliott Trudeau Intl to Illinois on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois from C$ 230

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/9. 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 Illinois

Cheapest flights from Pierre Elliott Trudeau Intl to IllinoisExplore the most affordable flight options available from Pierre Elliott Trudeau Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2026.

Explore the most affordable flight options available from Pierre Elliott Trudeau Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2026.

Best flights from Pierre Elliott Trudeau Intl to IllinoisDiscover carefully curated flight deals from Pierre Elliott Trudeau Intl to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Discover carefully curated flight deals from Pierre Elliott Trudeau Intl to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Direct flights from Pierre Elliott Trudeau Intl to IllinoisExplore direct flight options from Pierre Elliott Trudeau Intl to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 September 2026.

Explore direct flight options from Pierre Elliott Trudeau Intl to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 September 2026.

Last-minute flights from Pierre Elliott Trudeau Intl to IllinoisDiscover last-minute flight deals from Pierre Elliott Trudeau Intl to Illinois. Data last updated 17 September 2026 and is based on user searches.

Discover last-minute flight deals from Pierre Elliott Trudeau Intl to Illinois. Data last updated 17 September 2026 and is based on user searches.

One-way flights from Pierre Elliott Trudeau Intl to IllinoisSearch for one-way flight options from Pierre Elliott Trudeau Intl to Illinois. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.

Search for one-way flight options from Pierre Elliott Trudeau Intl to Illinois. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.

Find flight deals from Pierre Elliott Trudeau Intl to Illinois

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 Illinois that are best for you.

Best time to book a flight from Pierre Elliott Trudeau Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Pierre Elliott Trudeau Intl with our price prediction graph.

Cheapflights Insights

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

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

Find hourly flight availability from Pierre Elliott Trudeau Intl to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 September 2026.

A simple way to save on the total cost of your ticket is to fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois in the evening. If you’re flexible enough to do this you can expect to save up to 62% on your trip compared to booking a flight at noon.

Weekly flight availability from Montreal Pierre Elliott Trudeau Intl Airport to Illinois

The most flights from YUL to USIL are scheduled on a Tuesday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (26 on average).

How much does it cost to fly round-trip from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

Airfare is below average for this route at the moment.

Montreal Pierre Elliott Trudeau Intl Airport to Illinois flights typically cost between C$ 406 and C$ 643 in October.The cheapest round-trip price found within the last 5 days was C$ 392 on Air Canada (1 Oct-5 Oct).

How far ahead should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

The price you pay for your flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 87 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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Pierre Elliott Trudeau Intl and Illinois flights

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Cheapest flights from Pierre Elliott Trudeau Intl to Illinois
Explore the most affordable flight options available from Pierre Elliott Trudeau Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2026.

Best flights from Pierre Elliott Trudeau Intl to Illinois
Discover carefully curated flight deals from Pierre Elliott Trudeau Intl to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Direct flights from Pierre Elliott Trudeau Intl to Illinois
Explore direct flight options from Pierre Elliott Trudeau Intl to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 September 2026.

Last-minute flights from Pierre Elliott Trudeau Intl to Illinois
Discover last-minute flight deals from Pierre Elliott Trudeau Intl to Illinois. Data last updated 17 September 2026 and is based on user searches.

One-way flights from Pierre Elliott Trudeau Intl to Illinois
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Montreal Pierre Elliott Trudeau Intl Airport to Illinois flights typically cost between C$ 406 and C$ 643 in October.
The cheapest round-trip price found within the last 5 days was C$ 392 on Air Canada (1 Oct-5 Oct).