$166 Find Cheap Flights from Montreal to Illinois - Compare and Save

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KAYAK's insights & trends for Montreal to Illinois flights

Get data-powered insights and trends into flights from Montreal to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

Flight prices are below average for this route right now.

Flights to Illinois from Montreal Pierre Elliott Trudeau Intl Airport usually cost between $291 and $461 in October.
The lowest price found in the past 5 days was $281 on Air Canada (Oct 1-Oct 5).

What is the cheapest Montreal Pierre Elliott Trudeau Intl Airport to Illinois flight route?

The cheapest ticket to Illinois from Montreal Pierre Elliott Trudeau Intl Airport found in the last 5 days was to Chicago, at $241 round-trip. The most popular route is from Montreal Pierre Elliott Trudeau Intl Airport (YUL) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $241.

What is the cheapest time of day to fly to Illinois?

The cheapest time of day to fly to Illinois is generally in the afternoon, when round-trip flights cost $480 on average. Morning departures are around 9% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $533.

Can I save money by flying with a layover from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

No, with an average price for the route of $344, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to Illinois?

The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to Illinois is April, when tickets cost $275 (return) on average. On the other hand, the most expensive months are September and August, when the average cost of round-trip tickets is $402 and $393 respectively.

What’s the cheapest day of the week to fly from Montreal to Illinois?

Your flight ticket price will generally be cheaper if you fly to Illinois on a Thursday and more expensive on a Monday. On your return trip to Montreal, you should consider flying back on a Thursday, and avoid Sundays for better deals.

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

To get a below average price on the flight from Montreal Pierre Elliott Trudeau Intl Airport to Illinois, you should book around 5 weeks before departure, which saves you about 46% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low season

January

Cheapest flight

$166
Best time to beat the crowds with an average 30% drop in price.
Flight from Montreal to Chicago O'Hare Airport

Flights from Montreal to Illinois: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Montreal to Illinois 
Steven AnthonyFlew with United Airlines-Aug 2024
Don't take the 6am flight. Airport security and customs only open at 430am. So if you show up the recommended 3 hours before, you're waiting in line for nothing
Verified travelerFlew with United Airlines-Apr 2024
Come prepared with your own entertainment as the flight did not offer in flight entertainment

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Montreal to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Montreal to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Montreal to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Montreal to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Montreal to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Montreal to the following destinations at these prices or less: Chicago $265 one-way - $363 round-trip

Reviews of the top 4 airlines serving from Montreal to Illinois

 
Need help choosing which airline to fly with from Montreal to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Porter AirlinesOverall score based on 460 reviews
8.6Crew
8.2Boarding
7.6Food
6.9Entertainment
8.0Comfort
Airline reviews

A very comfortable flight, an additional wash room could have made it almost perfect.

10.0 ExcellentAnonymous, Aug 2026
Read more Porter Airlines reviews

A very comfortable flight, an additional wash room could have made it almost perfect.

Look, I understand that Kayak doesn't know I cancelled my flight on Porter. So I didn't actually fly yesterday. My main disappointment is with Porter ticket fare policies, and maybe you can pass this on to them: At my employer's request, I had booked a full fare ticket with no change fees since my trip to Toronto would likely be extended. Indeed, when I went to change my flight home to a later date, I was told the Fare Difference would cost an additional $550. So much for no change fees lol! While I had the agent on the line, I hopped over to Kayak, searched for new flights on the date in question, and saw a one-way ticket that got me home for only $355. So I got reimbursed about $450for the unused half of my roundtrip and bought a new ticket for $355. What good is a full fare / no change fee ticket if they screw you with "fare difference" BS. I'm still flying home on Porter Airlines but they just lost a hundred bucks with their stupid shenanigans.

I flew with Porter yesterday and overall had a positive experience. The flight was delayed, but the airline did a good job keeping passengers informed with frequent updates throughout the process. My biggest challenge was actually in Terminal 3, where the speaker system wasn’t very clear. It was often difficult to hear the announcements, which made it harder to follow updates at the gate. On board, the experience improved significantly. The aircraft felt very new and well maintained, and the seats were surprisingly comfortable for a short-haul flight. One of the flight attendants seemed a little disengaged, but the other was excellent—friendly, professional, and a pleasure to interact with. Despite the delay, the comfortable aircraft, clear communication from Porter, and positive onboard service made for a good overall experience.

The Flight took off 2hrs late because there was no pilot showing up when the flight was ready to board.. Though the cabin crew was present and had prepared the plane, the FO turned around after 15 min and went away. A crew to fly the plane finally arrived over an hour later and we were able to board 1h30 min later than planned time... until everything was loaded, we left 2h late from the gate. This was a small plane, so don't expect any Entertainment... Wi-Fi access on board would work, but took an awful amount of time to figure out and get it work (I'm an IT person). Flying as VIPorter customer, I was expecting at least some warm meal, but everything served was just cold.. except the coffee maybe. Even in so-called VIPorter seats, space is cramped and trays are so tiny, you can barely setup your food. Flight caught up during the coast-to-coast crossing and was able to recoup about 45 min from the delay.. still arrived very late in Vancouver and had to wait a long time to get our registered bags. Let's see how the return flight will be in a few days..

It was okay. Had a thing with the front desk, she had me repack my suitcases to have them be under the weight restrictions, but then the other one was overweight, she argued with me about it when there were tons of people in line. Wasn’t great.

On my e-boarding pass it shows free wifi, yet the plane I was on didn’t have wifi. Please remove false advertising from your website and boarding passes

Organization and the adjusted times but the snacks could be of a bigger portion

Our flight was delayed by a bit. I appreciated that we were kept informed on why periodically. Boarding was fine. I overheard one flight attendant sounding very rude to a passenger who was not paying attention to the safety demonstration. The snacks were minimal as it was a short flight. There was no entertainment. Overall the flight was good back to LGA.

Seemed like an old plane. Very noisy. The seat cushions were so old that the metal bracing of the seats were poking through. There was plenty of leg room though.

The only issue had when i mentioned about comfort was the man beside me was on the larger side and took about 1/3 of my seat where i was pressed against the wall/window of the plane for the trip.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

Very nice and clean plane. Transit time between flights was tight though

So far so good but food and entertainment are not available for this flight

HORRIBLE WITH THEIR WEBSITE!!! WORST WEBSITE IN THE WHOLE AIRLINE INDUSTRY

There was no room in overhead bin to place our luggage despite we had tree seats. It means a lot of people had more than 1 carry on bags. When I asked a crew member to help she said that it was not her responsibility.

The plane used to go to Chicago was a bit outdated and needed a refresh

The check-in and passport submission was complicated and repetitive, due to the poor communication between Air Canada and United. There should have been a single set of instructions and a single questionnaire that provided the data for both airlines.

It was good! Appreciated that it was very on schedule so it made the connecting flight less stressful

Internet was not working for a bet . Hard to order food with our credit card because it was not in your system .

Booked economy through United - air canada treated it as standby and was almost refused boarding.

I've never seen such poor lack of information at a gate station in 69 years. The flight from COS was to depart at 12:37pm. At boarding time, the gate agent in the microphone mumbled something completely unintelligible. I understood one word. "mechanical". Nothing else. Absolutely nothing else was reported for the next 1-1/2 hours. Past the time for departure, at 12:37pm, the gate agent simply walked away and the station was left unattended, as all of the passengers waited expectantly. The board still said that the flight was ON TIME. That was hard to believe since it was then well past 12:37pm and we all were sitting at the gate and there was absolutely no gate agent anywhere in site. I stopped an employee who was standing somewhere else and said that we can use some information. Much later, the same gate agent said that he will have information for us about 5 minutes but he "doesn't know any more than you do." Of course, five minutes came and went and he did absolutely nothing. One and a half hours after 12:37pm, he opened the door and began boarding. No explanation, no apology. Once we were boarded, the same happened on the plane. We sat. No explanation, no apology, from any flight attendants. Finally, finally, a pilot apologized and explained that there would be a delay. WELL NO KIDDING !

Our flight from Chicago to Des Moines was the problem flight due to a dismissive flight attendant. His conduct was unnecessary and unprofessional.. I will avoid using Americam Airlines again because of the situation. Very disappointing.

Mostly excellent. However, many too many gate changes. Connecting flight at ORD changed gate 6 times.

This may have been the hottest cabin temperatures I have experienced on any flight prior to take off lasting for approximately 30 minutes. I am not typically one to complain but I was genuinely worried about the health of several passengers on the flight due to the extreme temperatures including a small toddler.

The flight was on time and crew were nice, seats were tight and there was entertainment available

Worst flight ever. I was suppose to have a 3 1/2 hour layover in Chicago but got to the gate 4 minutes before boarding.

A cookie and a soda, packed like sardines, will never be a positive experience. Also, boarded a 5:30 flight at 7:45pm

The crew was very helpful and the aircraft was clean. More attentiveness to us in business class.

lounge was the highlight - seats weren't that comfortable - it was a full flight but no complaints

Incompetent crew at the boarding counter. Never flying AA again.

After 3 hours of delays, they ended up cancelling my flight. And although I could purchase one-way tickets to get to my destination, they would not offer me these flights as compensation for the cancelled flight, and I didn't end up making it home until 13 hours after I was originally supposed to arrive. It made for an extremely strenuous end to an otherwise good trip.

Flight was delayed, I had to put my luggage all the way in the back! They served only a beverage no snack on the way in Air Canada, definitely not a good first impression.

When we got to the airport for our flight from Chicago to Montreal which was scheduled for 2.00 p.m. they had no record of it and booked us on a flight at 3.30 very disappointing . We also had to pay 50.00 each for a seat. All things considered ,I will never book thru Kayak again. Next time I will only book directly thru Air Canada no second party booking Sue

There were changes to my flight with many email and very difficult to keep up with details of changes. I consulted Air Canada website that said I was to depart Casablanca at 9:35 but when I got to airport that take off time was delayed by 2 hours. That's 2 hours at an airport instead of bed. I don't understand why Air Canada website didn't show the change in take off like they showed the change in transfer. Do better.

I liked that the flight was on time for departure and arrival

Flight takeoff delayed as second plane needed to be towed to the gate. At my check in kiosk, an Air Canada staffer was walking by and paused to help me. Flight attendant was careful and helpful with my carry on. Spectacular customer service. No food. It was a short flight.

2 hour delay in Montreal sitting in the planes and then 50 minutes waiting for a gate in Chicago. The least they could do was to give us snacks while we sat in the plane over the dinner hour. Instead they wanted $6 for pretzels, chips or crackers. Come on at least give us those for free while we wait on a 3 hour delay.

Booked through Kayak and what I thought was Air Canada. Had a United flight number and needed to check in with United. Not even in AC system. At O hare we arrived at terminal 2 and sent our bags to terminal 1. Fun way to end a trip, walk two blocks to get your bags, then 2 blocks back to get picked up.

Limited legroom and old direct tv technology made for a very uncomfortable 4 hour flight. Delays getting out of the gate were not communicated adequately, so there was unrest at the start.

Never made ir to Chicago. I had to take a flight to Columbus Ohio, to get the closest possible. Because, the flight they booked, and rebooted for us 4 times ended up canceled, or delayed making us missed our connection or returned to where we came from.

More options for your flight from Montreal to Illinois

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