$488 Cheap Flights from Ottawa (YOW) to Helena (HLN)

View $488 flight on Tue, Dec 23, 2025Opens in a new window

Popular airlines from Ottawa International Airport (YOW) to Helena, MT (HLN-Helena Regional)

Cheap Flights from Ottawa to Helena (YOW-HLN)

Prices were available within the past 7 days and start at $488 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 Macdonald-Cartier Intl. Airport (YOW) to Helena Regional Airport (HLN) cost?
Grab a cheap one-way flight from $488 or cheap return flight from Macdonald-Cartier Intl. Airport (YOW) to Helena Regional Airport (HLN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Macdonald-Cartier Intl. Airport (YOW) to Helena Regional Airport (HLN)?
The cheapest month to fly from YOW to HLN is , when there's less demand. Off-peak months are often when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Macdonald-Cartier Intl. Airport (YOW) to Helena Regional Airport (HLN)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll fly you from YOW to HLN. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Macdonald-Cartier Intl. Airport (YOW) to Helena Regional Airport (HLN)?
You'll have to catch a flight with a layover if you're traveling from Macdonald-Cartier Intl. Airport (YOW) to Helena Regional Airport (HLN). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from YOW to HLN?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on a range of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Macdonald-Cartier Intl. Airport (YOW) to Helena Regional Airport (HLN)?
To arrive at Helena Regional Airport (HLN) without delays, choose a flight that leaves Macdonald-Cartier Intl. Airport (YOW) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Macdonald-Cartier Intl. Airport (YOW) to Helena Regional Airport (HLN) last-minute?
Waiting until right before your break to book a flight from YOW to HLN often results in higher prices. While you might find some last-minute deals, they're not always guaranteed. Keep your travel plans flexible for a better chance of landing a bargain.
Is it cheaper to book a YOW to HLN flight and hotel package?
Securing a YOW to HLN flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Pick from our wide range of accommodations and then add activities, car rentals and flights 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 Macdonald-Cartier Intl. Airport (YOW) to Helena Regional Airport (HLN)?
Typically, it's possible to cancel or reschedule your YOW to HLN flight. However, if it's been more than 24 hours since booking, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Macdonald-Cartier Intl.
Destination airport
Helena Regional
Distance
1731 mi

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Ottawa to Helena Flights

The cheapest times to fly from Ottawa 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 Ottawa to Helena are during the month of . You can find some of the cheapest flights from Ottawa to Helena with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ottawa to Helena

Sunday is one of the best days to book for cheap flights from Ottawa 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 Ottawa 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 Ottawa to Helena in 2025. You can also book with separate airlines for your outbound and return journeys, from $488 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 Ottawa 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 Ottawa 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.

 

Ottawa to Helena Flights

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*Available to One Key members.