Cheap Flights from Montreal to Illinois from $154 Roundtrip

Flight deals from Montreal to Illinois

Looking for cheap flights from Montreal to Illinois, or a last-minute trip? Find the lowest prices on one-way and round-trip flights right here.

Chicago.$154 per passenger.Departing Fri, Feb 20, returning Mon, Feb 23.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Montreal Pierre Elliott Trudeau on Fri, Feb 20, arriving in Chicago Midway.Inbound indirect flight with Porter Airlines, departing from Chicago Midway on Mon, Feb 23, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $154, select.

Chicago.$173 per passenger.Departing Tue, Feb 10, returning Wed, Feb 25.Round-trip flight with Air Canada.Outbound direct flight with Air Canada departing from Montreal Pierre Elliott Trudeau on Tue, Feb 10, arriving in Chicago O'Hare International.Inbound direct flight with Air Canada departing from Chicago O'Hare International on Wed, Feb 25, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $173, select.

Peoria.$586 per passenger.Departing Sun, Jan 18, returning Fri, Jan 23.Round-trip flight with Air Transat and Allegiant Air.Outbound indirect flight with Air Transat, departing from Montreal Pierre Elliott Trudeau on Sun, Jan 18, arriving in Greater Peoria.Inbound indirect flight with Allegiant Air, departing from Greater Peoria on Fri, Jan 23, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $586, select.

Moline.$586 per passenger.Departing Mon, Feb 2, returning Fri, Feb 6.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Montreal Pierre Elliott Trudeau on Mon, Feb 2, arriving in Moline.Inbound indirect flight with Delta, departing from Moline on Fri, Feb 6, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $586, select.

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Flying from Montreal to Illinois

Arm yourself with these facts on the fly.

Cheapest flight found	$154
Cheapest month to fly	February
Average flight time	2 hrs, 48 mins
Cheapest airport to fly from	Montreal Pierre Elliott Trudeau
Most popular airline	Air Canada

How to find cheap flights from Montreal to Illinois

We've compared the best online travel agents and flight providers on the Internet to find the cheapest plane tickets from Montreal to Illinois. Other savvy travelers recently found round-trip flights from $154 and one-way tickets from $103. Ready to join them? Here are a few tips to help you do it the smart way.

Fly from Montreal Pierre Elliott Trudeau into Chicago Midway

At the moment, the lowest-priced flight tickets to Illinois are from Montreal Pierre Elliott Trudeau Airport to Chicago Midway Airport.

Fly in February

We crunched the flight calendar and found the cheapest time to fly from Montreal to Illinois is currently February.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from Montreal to anywhere you choose in Illinois.

Watch as flight prices go up and down

With Price Alerts, we'll let you know when flight prices from Montreal to Illinois go up or down so you can book when the time is just right.

Relax – these are fee-free plane tickets

With us, there are no added fees – the Illinois to Illinois flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

What's the average Montreal to Illinois flight price?

We looked at all of the upcoming round-trip flights from Montreal to Illinois we could find over the next 12 months. It looks like $154 is the best price. This is good, compared to the average Illinois ticket price of $375.

What is the cheapest month to fly from Montreal to Illinois?

The cheapest month to fly from Montreal to Greater Peoria Airport is usually January. The cheapest month to fly from Montreal to Moline Airport is usually February. The cheapest month to fly from Montreal to Chicago Midway Airport is usually February. And the cheapest month to fly from Montreal to Chicago O'Hare International Airport is usually February.

On which upcoming date is it cheapest to fly from Montreal to Illinois?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Montreal to Illinois on Friday, February 20, 2026.

Are there any direct flights from Montreal to Illinois?

Montreal Pierre Elliott Trudeau Airport offers direct flights to Illinois.

If I'm flying from Montreal, where in Illinois is cheapest to fly to?

If you're flying from Montreal, the cheapest city in Illinois to fly into is Chicago. The cheapest airport serving Chicago at the moment is Chicago Midway.