Cheap Flights from Montreal to Chicago O'Hare International

Compare Montreal to Chicago O'Hare International flight deals

Find the cheapest month or even day of the year to fly to Chicago O'Hare International

Book the best Chicago O'Hare International fare with no extra fees

Flight deals from Montreal to Chicago O'Hare International

Looking for a cheap last-minute deal or the best return flight from Montreal to Chicago O'Hare International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Montreal to Chicago O'Hare International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Montreal to Chicago O'Hare International flights are currently cheapest in November.

Direct flights from Montreal to Chicago O'Hare International

Montreal to Chicago O'Hare International: Alternative routes

Compare routes from Montreal to Chicago below. You may find an airport to fly into that's cheaper, faster, or easier than Chicago O'Hare International.

Montreal to Chicago: Flight information

The things to know before you go.
Cheapest flight foundر.ق.‏ 371
Cheapest month to flyNovember
Average flight time2 hrs, 41 mins
Most popular airlineAir Canada
Average flights per week192

Finding cheap flights from Montreal to Chicago O'Hare International: Frequently asked questions

The best price we found for a return flight from Montreal to Chicago O'Hare International is ر.ق.‏ 562. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 41 minutes is the average flight time from Montreal to Chicago O'Hare International.
Air Canada, United and Alaska Airlines fly direct from Montreal to Chicago O'Hare International.
As of July 2025, there are 192 flights per week flying from Montreal to Chicago O'Hare International.
The cheapest month to fly from Montreal to Chicago O'Hare International is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Montreal to Chicago O'Hare International Airport on Saturday, 27 September 2025.
Yes – the average flight time is 2 hours and 41 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Chicago O'Hare International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Chicago is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Chicago O'Hare International is Air Canada .

Travelling from Montreal to O'Hare International Airport (ORD): What you need to know

  • Planning your trip begins with figuring out where you'll leave from in Montreal. Montreal-Pierre Elliott Trudeau International Airport (YUL) is the city's main base, so explore your options for booking a flight from Montreal to O'Hare International Airport (ORD) leaving from here.

  • The average length of a direct Montreal to O'Hare International Airport flight is 2 hours 40 minutes.

  • Chicago is one hour behind Montreal. O'Hare International Airport is located in Chicago, which runs on the UTC-5 timezone.

  • Montreal-Pierre Elliott Trudeau International Airport (YUL) to O'Hare International Airport (ORD) is the most popular route. There are 46 direct departures a week to choose from. If you have plans before you fly, hop on the last flight with Air Canada at 6:50pm. Opt for the first YUL to ORD departure with United Airlines at 6am if you'd rather get a move on.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Get to the airport on time to board your flight from Montreal to ORD.

  • With more people on the move during high season, aim to get to your terminal even earlier. Two hours for domestic flights and up to four for international journeys will allow extra time for delays.

Airports in Montreal

Montreal-Pierre Elliott Trudeau International Airport (YUL)

  • You can take a direct flight from Montreal to O'Hare International Airport (ORD) out of Montreal-Pierre Elliott Trudeau International Airport (YUL).

  • Pick from a variety of airlines offering direct flights from Montreal to O'Hare International Airport departing from YUL. Book your ticket with one of these:

  • The majority of travellers choose to fly with Air Canada from YUL to ORD.

  • The carrier with the most consistent on-time arrival rate on this route is American Airlines.

  • Travelling from central Montreal to YUL takes around 45 minutes on public transport. If you ride-share, drive or take a cab, you'll cover the 26 kilometres in 25 minutes or so, depending on traffic.

  • Looking for a comfortable hotel near Montreal-Pierre Elliott Trudeau International Airport? If you're catching an early flight from Montreal to O'Hare International Airport, these accommodation options will put you just around the corner from the terminal:

  • When it comes to Montreal-Pierre Elliott Trudeau International Airport's on-time performance, data shows 64.89% of flights arrive within the expected time frame.

  • The address for YUL is 975 Romeo Vachon Street North.

St. Hubert Airport (YHU)

About O'Hare International Airport (ORD)

Getting from O'Hare International Airport (ORD) to central Chicago

  • O'Hare International Airport to central Chicago is roughly 26 kilometres. If you're renting a car or taking a cab, plan in advance to make your trip as easy as possible. Journey times can vary based on traffic and the time of day.

  • Travelling on public transport takes about 55 minutes.

How to find the cheapest flights from Montreal to O'Hare International Airport (ORD)

  • ر.ق.‏ 371 is currently the best price for a one-way ticket from Montreal to O'Hare International Airport. A return flight starts at ر.ق.‏ 562. These fares can change depending on demand.

  • Don't wait until the last minute. You're more likely to walk away with cheap flights from Montreal to ORD if you book ahead. Airlines often have some amazing early bird deals.

  • Cheap Montreal to O'Hare International Airport tickets are easier to find when your travel dates are flexible. Try using the 'Whole month' search tool to compare fares across the month and then choose the cheapest day.

  • Stay on top of deals for flight tickets from Montreal to ORD by setting up a Price Alert. We'll send you an email or notification on the app when prices go down.

  • Hunt for savings on a flight from Montreal to O'Hare International Airport with the help of the filters. Pick your preferred departure and arrival times, airlines and number of stops. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best.'

The best time to fly from Montreal to O'Hare International Airport (ORD)

  • February is the quietest month for flights from Montreal to O'Hare International Airport (ORD), while August is the busiest. Figure out the best time to visit Chicago based on whether you prefer a laid-back vibe or a lively atmosphere.

  • The warmest month in Chicago is July, with temperatures ranging between 15ºC and 29ºC. Lock in your Montreal to ORD flight ticket then if that's your idea of comfortable weather.

  • Search for cheap tickets from Montreal to O'Hare International Airport in January if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between -12ºC and 3ºC.

More about Chicago

Explore more of the United States

  • You've visited Chicago, now it's time to explore more of the United States. Journey about 290 kilometres south-east to Indianapolis to check off its top sights. From 9-11 Memorial to Lucas Oil Stadium and Eiteljorg Museum, you'll have a packed itinerary ahead.

  • Milwaukee is another favourite destination in the United States and is around 121 kilometres north of Chicago. No trip is complete without seeing Richards Duplex Apartments by Frank Lloyd Wright, Miller Park and Milwaukee County Zoo.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.