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$138+ Cheap flights from Pierre Elliott Trudeau Intl (YUL) to Illinois

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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — ORD
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Pierre Elliott Trudeau Intl to Illinois

Keep the following information in mind while searching for Pierre Elliott Trudeau Intl to Illinois flight deals. Data was last updated July 30, 2025.

Round-trip from

$173
(Booking.com)

One-way from

$138
(Delta)

Popular in

November

Cheapest in

March

Average price

$371

Good round-trip deal

$388 or less

Good one-way deal

$229 or less
From Montreal Pierre Elliott Trudeau Intl to Illinois
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One-way flight from Montreal Pierre Elliott Trudeau Intl to Illinois
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Highest demand for flights based on searches. 6% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Montreal Pierre Elliott Trudeau Intl to Illinois.
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Price to beat on a one-way flight from Montreal Pierre Elliott Trudeau Intl to Illinois.
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Find flight deals from Pierre Elliott Trudeau Intl to Illinois

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 July 30, 2025.

This Booking.com deal was found by Cheapflights users on 7/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/118:20 amYUL - ORD
Nonstop2h 31mAir Canada
Thu 9/188:25 pmORD - YUL
1 stop4h 25mAir Canada
Deal found 7/28$173
This American Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 8/305:29 pmYUL - ORD
Nonstop2h 36mAmerican Airlines
Tue 9/28:34 pmORD - YUL
1 stop16h 06mAmerican Airlines
Deal found 7/27$174
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1910:45 amYUL - MDW
1 stop6h 39mPorter Airlines
Fri 9/55:20 pmMDW - YUL
1 stop3h 55mPorter Airlines
Deal found 7/28$183
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/46:00 amYUL - ORD
1 stop8h 09mDelta
Sat 9/1310:30 amORD - YUL
1 stop7h 55mDelta
Deal found 7/30$215
This United deal was found by Cheapflights users on 7/30. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/44:55 pmYUL - ORD
Nonstop2h 46mMultiple Airlines
Sun 9/78:40 amORD - YUL
Nonstop2h 17mMultiple Airlines
Deal found 7/30$243
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/306:00 amYUL - MDW
1 stop7h 28mDelta
Wed 9/31:43 pmMDW - YUL
1 stop8h 33mDelta
Deal found 7/29$245
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/286:15 amYUL - ORD
Nonstop2h 46mUnited Airlines
Tue 9/22:08 pmORD - YUL
Nonstop2h 18mUnited Airlines
Deal found 7/29$262
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 9/1312:31 pmYUL - STL
1 stop10h 22mAmerican Airlines
Sat 9/202:01 pmSTL - YUL
1 stop20h 45mAmerican Airlines
Deal found 7/30$326
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:00 amYUL - STL
1 stop27h 06mDelta
Tue 9/166:40 amSTL - YUL
1 stop4h 20mDelta
Deal found 7/29$408
This Air Canada deal was found by Cheapflights users on 7/29. 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 9/86:10 pmYUL - STL
Nonstop2h 47mAir Canada
Tue 9/169:15 amSTL - YUL
1 stop6h 05mAir Canada
Deal found 7/29$427
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/88:00 pmYUL - STL
2 stops20h 44mUnited Airlines
Tue 9/165:30 pmSTL - YUL
1 stop17h 27mUnited Airlines
Deal found 7/29$445
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/127:00 amYUL - STL
3 stops10h 35mMultiple Airlines
Fri 9/191:00 pmSTL - YUL
3 stops25h 20mMultiple Airlines
Deal found 7/29$481

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pierre Elliott Trudeau Intl to Illinois 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 July 30, 2025.
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

Pierre Elliott Trudeau Intl

Fly to

Illinois

Route

Depart

Return

Price

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 9/11

8:20 am-9:51 am

Nonstop2h 31m

Chicago O'Hare Intl

Thu 9/18

8:25 pm-1:50 am

1 stop4h 25m

$173

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 8/30

5:29 pm-7:05 pm

Nonstop2h 36m

Chicago O'Hare Intl

Tue 9/2

8:34 pm-1:40 pm

1 stop16h 06m

$174

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Tue 8/19

10:45 am-4:24 pm

1 stop6h 39m

Chicago Midway

Fri 9/5

5:20 pm-10:15 pm

1 stop3h 55m

$183

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

6:00 am-1:09 pm

1 stop8h 09m

Chicago O'Hare Intl

Sat 9/13

10:30 am-7:25 pm

1 stop7h 55m

$215

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

4:55 pm-6:41 pm

Nonstop2h 46m

Chicago O'Hare Intl

Sun 9/7

8:40 am-11:57 am

Nonstop2h 17m

$243

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sat 8/30

6:00 am-12:28 pm

1 stop7h 28m

Chicago Midway

Wed 9/3

1:43 pm-11:16 pm

1 stop8h 33m

$245

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 8/28

6:15 am-8:01 am

Nonstop2h 46m

Chicago O'Hare Intl

Tue 9/2

2:08 pm-5:26 pm

Nonstop2h 18m

$262

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 9/13

12:31 pm-9:53 pm

1 stop10h 22m

Lambert-St Louis

Sat 9/20

2:01 pm-11:46 am

1 stop20h 45m

$326

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 9/8

6:00 am-8:06 am

1 stop27h 06m

Lambert-St Louis

Tue 9/16

6:40 am-12:00 pm

1 stop4h 20m

$408

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 9/8

6:10 pm-7:57 pm

Nonstop2h 47m

Lambert-St Louis

Tue 9/16

9:15 am-4:20 pm

1 stop6h 05m

$427

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 29 results
1
2
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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.
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

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

Currently, August is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois (average of $245). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois in March is currently the most expensive (average of $321). 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?

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 July 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois as you normally would.

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

Explore weekly flight availability from Pierre Elliott Trudeau Intl to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 30, 2025.

The most flights from YUL to USIL are scheduled on a Monday (31 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (29 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois, such as Porter Airlines, Delta, and United Airlines. 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
318 reviews

Crew

8.7

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
318 reviews
Porter Airlines
8.0
Very good
318 reviews

Crew

8.7

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Delta
8.0
Very good
7,980 reviews
Porter Airlines
8.0
Very good
318 reviews

Crew

8.7

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,896 reviews
Porter Airlines
8.0
Very good
318 reviews

Crew

8.7

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
318 reviews

Crew

8.7

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
WestJet
7.2
Good
2,975 reviews
Porter Airlines
8.0
Very good
318 reviews

Crew

8.7

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

Related info for your journey

Find useful and relevant information for your journey from Pierre Elliott Trudeau Intl to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $138. Users have also found prices from $139 and $145 on American Airlines and Porter Airlines, respectively.

  • What are the most popular routes from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

    Most travelers choose Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl, Montreal Pierre Elliott Trudeau Intl - Chicago Midway or Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis when deciding on the best route from Montreal Pierre Elliott Trudeau Intl Airport to Illinois.

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

    Before booking your flight to Illinois from Montreal Pierre Elliott Trudeau Intl Airport, check out the most reliable airlines to get you to your destination on time: Qantas Airways (95%), Qatar Airways (93%), Emirates( 91%).

  • What are the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

    Looking for the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois? While on average our users pay $1,347, our data indicates the cheapest price to be $155. The most popular route (Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl), is priced around $192.

  • 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, August is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois (average of $245). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Illinois in March is currently the most expensive (average of $321). 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 Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Pierre Elliott Trudeau Intl to Illinois

Discover the top 5 airlines that operate flights from Pierre Elliott Trudeau Intl to Illinois. 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$112Average$487FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$217Average$441FlexibilityNo cancel feeOn-time67%
Porter AirlinesCheapest$217Average$325FlexibilityNo cancel feeOn-time52%
American AirlinesCheapest$275Average$407FlexibilityNo cancel feeOn-time71%
WestJetCheapest$334Average$340FlexibilityNo cancel feeOn-time60%

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