$388 Cheap Flights from Montreal (YUL) to Helena (HLN)

View $388 flight on Fri, May 22, 2026Opens in a new window

Popular airlines from Montreal–Trudeau Intl. Airport (YUL) to Helena, MT (HLN-Helena Regional)

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Cheap Flights from Montreal to Helena (YUL-HLN)

Prices were available within the past 7 days and start at $388 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN) cost?
Snag a cheap one-way flight from $388 or cheap return flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN)?
The cheapest month to fly from YUL to HLN is , when demand is low. Off-peak season is usually when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from YUL to HLN. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN)?
There aren't any daily direct flights departing from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from YUL to HLN?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN)?
Choose a flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN) that takes off before 3 PM to reduce the risk of cancellations. Later departures have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN) last-minute?
Last-minute bookings from YUL to HLN are usually more expensive. For the best prices, start looking for flights well in advance. That said, if you're flexible with your travel dates, you may score a cheap ticket right before your journey.
Is it cheaper to book a YUL to HLN flight and hotel package?
Securing a YUL to HLN flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Helena Regional Airport (HLN)?
If you booked your YUL to HLN flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

Travel information

Origin airport
Pierre Elliott Trudeau Intl.
Destination airport
Helena Regional
Distance
1817 mi

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Montreal to Helena Flights

The cheapest times to fly from Montreal to Helena

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Montreal to Helena are during the month of . You can find some of the cheapest flights from Montreal to Helena with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Montreal to Helena

Sunday is one of the best days to book for cheap flights from Montreal to Helena: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Montreal to Helena

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Montreal to Helena in 2025. You can also book with separate airlines for your outbound and return journeys, from $388 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Montreal to Helena flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Montreal to Helena airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Montreal to Helena Flights

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*Available to One Key members.