YUL - ORD

$174 Find Cheap Flights from Montreal to Chicago O'Hare Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Montreal to O'Hare Intl departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago O'Hare Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to Chicago, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to Chicago, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$291
Typical prices: $420-$277
Air Canada, Porter Airlines
Fri 9/4Tue 9/8
YUL - ORD • 2 stops
Cheapest non-stop
$292
Typical prices: $425-$284
United Airlines
Thu 9/3Mon 9/7
YUL - ORD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
United Economy Plus adds legroom; American Main Cabin Extra adds early boarding.
At YUL, allow time for US preclearance; Air Canada Wi-Fi is only on select flights.
Expert advice
Expert advice
+1
+1
Expert advice
Expert advice
+1
Top airlines
Cheapest • from $292 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Air Canada, American Airlines and United Airlines. Average duration is 2h 38m
Direct flights
Direct flights
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Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $189 (round-trip)
Shortest trip • 5h 05m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 57% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 25% price drop
Most popular
Good to know
Good to know
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Good to know
Good to know
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to O'Hare Intl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Montreal to O'Hare Intl (YUL-ORD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Montreal to O'Hare Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Montreal to O'Hare Intl

Fri, Sep 4 - Tue, Sep 8
Multiple Airlines Logo
8:40 am - 1:22 pm
YUL
-
ORD
5h 42m
2 stops
Multiple Airlines Logo
3:20 pm - 8:10 pm
ORD
-
YUL
3h 50m
1 stop
$291Multiple Airlines
Sat, Jun 27 - Wed, Jul 1
Air Canada Logo
11:10 am - 2:55 pm
YUL
-
ORD
4h 45m
1 stop
Air Canada Logo
7:25 am - 1:47 pm
ORD
-
YUL
5h 22m
1 stop
$292Air Canada
Thu, Sep 3 - Sun, Sep 6
United Airlines Logo
9:45 am - 11:21 am
YUL
-
ORD
2h 36mnonstop
United Airlines Logo
8:45 am - 2:40 pm
ORD
-
YUL
4h 55m
1 stop
$293United Airlines
Fri, Sep 4 - Mon, Sep 7
Delta Logo
6:00 am - 1:08 pm
YUL
-
ORD
8h 08m
1 stop
Delta Logo
7:00 am - 4:20 pm
ORD
-
YUL
8h 20m
1 stop
$294Delta
Thu, Jun 25 - Mon, Jun 29
Air Canada Logo
8:45 am - 1:19 pm
YUL
-
ORD
5h 34m
1 stop
Air Canada Logo
8:35 am - 11:58 am
ORD
-
YUL
2h 23mnonstop
$295Air Canada
Tue, Jul 21 - Sun, Jul 26
Air Canada Logo
4:30 pm - 8:29 pm
YUL
-
ORD
4h 59m
1 stop
Air Canada Logo
2:00 pm - 9:47 pm
ORD
-
YUL
6h 47m
1 stop
$296Air Canada
Thu, Jun 25 - Tue, Jun 30
United Airlines Logo
6:10 am - 7:50 am
YUL
-
ORD
2h 40mnonstop
United Airlines Logo
6:30 am - 7:45 pm
ORD
-
YUL
12h 15m
1 stop
$297United Airlines
Tue, Jun 30 - Sat, Jul 4
Air Canada Logo
7:30 am - 1:19 pm
YUL
-
ORD
6h 49m
1 stop
Air Canada Logo
7:25 am - 1:47 pm
ORD
-
YUL
5h 22m
1 stop
$298Air Canada
Thu, Sep 3 - Mon, Sep 7
Air Canada Logo
8:40 am - 10:16 am
YUL
-
ORD
2h 36mnonstop
Air Canada Logo
9:50 am - 5:27 pm
ORD
-
YUL
6h 37m
1 stop
$300Air Canada
Thu, Sep 3 - Mon, Sep 7
Air Canada Logo
8:40 am - 10:16 am
YUL
-
ORD
2h 36mnonstop
Air Canada Logo
9:50 am - 5:27 pm
ORD
-
YUL
6h 37m
1 stop
$301Air Canada
Booking Insights

KAYAK's insights & trends for Montreal to O'Hare Intl flights

Get data-powered insights and trends into flights from Montreal to O'Hare Intl 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 Chicago O'Hare Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport departing in September.

What’s the cheapest day of the week to fly from Montreal to Chicago O'Hare Airport?

The average price of all round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Montreal to Chicago O'Hare Airport, look for departures on Thursdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Chicago O'Hare Airport, Thursday is the cheapest day to fly and Sunday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport is April, where tickets cost $265 (return) on average. On the other hand, the most expensive months are June and October, where the average cost of round-trip tickets is $473 and $402 respectively.

Can I save money by flying with a layover from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $318, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport, you should book around 5 weeks before departure, which saves you about 57% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Expert advice

Expert advice for your flight from Montreal to O'Hare Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, United Airlines and ORD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Brandon Schultz

Brandon Schultz

Expert on YUL

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Good to know

Low seasonFebruary
Cheapest flight$174
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from Montreal to Chicago O'Hare Airport

When to book flights from Montreal to O'Hare Intl

Are your dates flexible? Find out the best times to travel from Montreal to O'Hare Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from Montreal to O'Hare Intl: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Montreal to O'Hare Intl 
Steven AnthonyFlew with United AirlinesAug 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 AirlinesApr 2024
Come prepared with your own entertainment as the flight did not offer in flight entertainment

FAQs for booking Montreal to Chicago O'Hare Airport flights

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

    In the last 5 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport was $174 for a one-way ticket and $291 for a round-trip.

  • Do I need a passport to fly between Montreal and Chicago O'Hare Airport?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Montreal and on arrival in Chicago O'Hare Airport.

  • Which airlines offer Wi-Fi service onboard planes from Montreal to Chicago O'Hare Airport?

    All the following airlines offer inflight Wi-Fi service on the Montreal to Chicago O'Hare Airport flight route: Air Canada, United Airlines, American Airlines, WestJet, Delta, and Porter Airlines.

  • Which aircraft models fly most regularly from Montreal to Chicago O'Hare Airport?

    The Embraer 175 (Enhanced Winglets) is the aircraft model that flies most regularly on the Montreal to Chicago O'Hare Airport flight route.

  • Which airline alliances offer flights from Montreal to Chicago O'Hare Airport?

    oneworld, and Star Alliance are the airline alliances operating flights between Montreal and Chicago O'Hare Airport, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from Montreal to Chicago O'Hare Airport?

    There are nonstop flights from Montreal to Chicago O'Hare Airport on a daily basis.

  • Which is the best airline for flights from Montreal to Chicago, United Airlines or Air Canada?

    The two airlines most popular with KAYAK users for flights from Montreal to Chicago are United Airlines and Air Canada. With an average price for the route of $384 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of $321 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Montreal to Chicago O'Hare Airport?

    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 Chicago O'Hare Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Montreal 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 Chicago O'Hare Airport?

    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 to Chicago O'Hare Airport with an airline and back to Montreal with another airline. Booking your flights between Montreal and ORD can sometimes prove cheaper using this method.

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

    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 to Chicago O'Hare Airport from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $252 or less one-way and $332 or less round-trip.

Prefer to fly direct from Montreal to Chicago O'Hare Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl.
Find which airlines fly direct from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport, which days they fly and book direct flights.

Direct departures

Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl

Monday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Tuesday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Wednesday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Thursday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Friday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Saturday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Sunday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

See more direct flights

Direct returns

Chicago O'Hare Intl to Montreal Pierre Elliott Trudeau Intl

Monday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Tuesday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Wednesday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Thursday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Friday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Saturday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

Sunday

Air Canada,American Airlines,United Airlines

Air Canada,American Airlines, +1 more

See more direct flights

Reviews of the top 3 airlines serving from Montreal to O'Hare Intl

 
See real verified KAYAK customer reviews for airlines flying from Montreal to Chicago. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Montreal to O'Hare Intl? 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.
7.4
United AirlinesOverall score based on 9830 reviews
7.7Boarding
6.6Food
8.1Crew
7.1Entertainment
7.3Comfort
Airline reviews

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

2.0 MediocreLynn, Jun 2026
DCA - ORD
Read more United Airlines reviews

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

I flew from Barcelona to Chicago on UA yesterday. The flight was on time, the pilots did a great job and the flight attendants were super nice. All of them. Also food was good, and the drinks, including wine were served a few times during our flight. I highly recommend this airline.

Boarded early, left early, arrived 40 mins early! A win win for me!

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

This flight is a quick way to get to Chicago, but a bit expensive.

The clerk at check in for my bags was very rude. My credit card was hacked during my vacation and she told me it was not possible to pay in cash for my bag. “You bought the cheapest ticket, you should have bought a ticket that included a bag. If you cannot pay with a credit card, we will not let you on this flight”. She spoke to her supervisor and then told me , I could ask other passengers, if they would use their credit card to check my bag. I had to beg 5 different people, till one agreed to use their credit card. I payed them cash of course. This was a very stressful and humiliating experience for me. I strongly suggest you build in some kind of provision for travelers who got robbed.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Flight crew was super friendly and helpful. Food was frequent and honestly pretty good. Plenty of on-board entertainment. Economy seats are super cramped for such a long flight, but the crew allowed people to get up and stretch, and kids could wander with their parents, so we all made it work. Overall a very good experience.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

The flight from LA to Chicago was smooth and service was very good overall.

The Mario was so helpful and provided amazing customer service however l have being waiting for a callback for almost a week now and have not heard anything further after l informed them l wanted to change my date of traveling because of my hospital appointment even send them proof and l was unable to use manag your booking on their website is a bit frustrating and l would appreciate an update on My request as soon as possible. And have called them times without numbers no response

Awful, tons of delays, I got into Chicago multiple hours late meaning I hit the very traffic I tried so desperately to avoid. Just empty apologies from American Airlines text alerts. Trash behavior from a trash airline.

They lost my baggage and I am still struggling to the information and update

The homeless eat better than what was served on that plane. Pretzels and ice cream? My last trip to Europe. Everything is small, but the bill.

Awful customer service, horrible experience. We travel a lot domestic & international- worst flights to/from ever. Brief bkgd as Inhate to relive this experience: booked and chose 2 seats 4 months prior in Premium Economy - last row end seats close to bathroom, no one behind us, plenty of legroom;, underwear storage — flown this was on other airlines, love it. We receive notice 4 days before scheduled overseas flight - plane has changed, new seats assigned. Seats are split into single seats, opposites of the plane, FRONT Row so no reachable storage. Called BOTH British Air & America. American “switched planes and the seats you want are taken;” British Air “Yes, we’ll be glad to accommodate you (type type type). Just ask at the Gate and someone will give you new boarding passes with seats together in middle, OK?” — OK. —At Gate the attendant looks us up saying “No, it is an overbooked flight and yours are the only seats available.” But but but wait, “We were TOLD our seats had been switched and seated together?” Gate attendant “Well they were wrong and don’t change your seats. Your original seats are where you’ll sit.”. Right. No help WHATSOEVER. We sit opposite on way there, wife VERY disgruntled, a Tol 5 worst ways to start a 3-week bus tour of UK. We promise to NEVER FLY AMERICAN OR BROTISH AIR EVER, and we have 3 more extensive trips planned..

Requested early boarding to disinfect seat, tray table, etc. before general boarding. Instructed to board after wheelchair passengers. Waited on jet bridge behind 12 wheelchair passengers. Stopped immediately after entering plane to wait for gate agent in rear of plane cleaning a seat that was wet, got to my row and found both seats adjacent to mine already occupied, with the lack of room making it impossible for me to clean my own space and defeating the purpose of my boarding early. Cleaned the armrests and tray table as best I could.

The wifi experience is awful. I had to try again and again, taking over 30 minutes, to connect to the wifi. I had to watch the same two ads over and over until I was finally successful. Once connected, it was anything but "high speed" and disconnected at least three times during the flight.

It was good, the staff was great, and the food, was as usual, tea and biscuit. Bathroom was clean, and the plane was clean as well.

The flight was smooth, the plane was spacious and clean, the staff was kind and the food was decent.

Pretzels were a bit dry and dusty, however it is nice to have a choice between sweet and savory snacks.

Flight crew was great, and even the crew for checking bags! I had a question for a friend of mine flying tomorrow and the man I talked to was awesome and answered my questions and looked up things for me when he didn’t have to! I was able to give her current & accurate info for her flight and she was so appreciative too!!

Another good flight experience with Air Canada. The business section did not feature the full length sleeping arrangement, but this was a shorter trip. The food was excellent. But the flight crew was truly top tier: friendly, cheerful, helpful at all the right times. Air Canada truly outshines all U.S. carriers.

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.

Be careful about the bad policy and when purchasing seats

Very disappointed with premier lounge. Food selection very poor, both coffee machines out of order. For the price you charge for an upgrade, the seats don’t fully recline, movie selection is old. Not very good value. Asian airlines are light years ahead at a more affordable price.

We left over 2 hours late and they didn't even give us a complimentary snack, when getting to the desk I asked if I could be put in a row with only 1 other person or an empt y one I was told the flight was full when the last two rows were empty. All around over it

Air Canada’s problems are not staff related by and large, no. The problem is tiny jets between the U.S. and Canada - yes, believe it or not they are still “international” (just ask our own Mango Maniac in power in the U.S.). The little aisle is compounded by a design flaw of a “dog leg” starting at seat 12. Woe be unto you if you sit here as passengers and attendants do not have sufficient room to not hit you in the face with backpacks. One thing I will say very positively about Air Canada is you still provide pillows and blankets on transcontinental flights to all, not just the elites. Your tiny improperly designed jets are also a problem flying city to city within Canada also. One can only say you remind us of a “Jet Blue” or “Spirit” experience. Also your luggage space is downright Byzantine! We will endeavor to avoid you and use other U.S. carriers, albeit charging more.

Terrible canceled flight and lost my luggage. Flew me to Halifax. Tgat flight was delayed, had to spend night in airport chair.

Everything you need to know for your flight from Montreal to O'Hare Intl

Information on your arrival and departure airports