$126 Cheap Flights from Helena (HLN) to Boise (BOI)

View $126 flight on Tue, Jun 3, 2025Opens in a new window

Popular airlines from Helena, MT (HLN-Helena Regional) to Boise Airport (BOI)

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Find available prices by choosing your travel dates.

Cheap Flights from Helena to Boise (HLN-BOI)

Prices were available within the past 7 days and start at $126 for one-way flights and $253 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, May 20 - Wed, May 28
HLN
Helena
BOI
Boise
$253 Roundtrip, found 2 days ago
$253
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, May 20 from Helena to Boise, returning Wed, May 28, priced at $253 found 2 days ago
Alaska Airlines
Tue, May 20 - Tue, Jun 10
HLN
Helena
BOI
Boise
$273 Roundtrip, found 2 days ago
$273
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, May 20 from Helena to Boise, returning Tue, Jun 10, priced at $273 found 2 days ago
Delta
Tue, Jun 17 - Tue, Jun 24
HLN
Helena
BOI
Boise
$275 Roundtrip, found 3 days ago
$275
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Jun 17 from Helena to Boise, returning Tue, Jun 24, priced at $275 found 3 days ago
Hawaiian Airlines
Tue, May 20 - Tue, May 27
HLN
Helena
BOI
Boise
$277 Roundtrip, found 2 days ago
$277
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, May 20 from Helena to Boise, returning Tue, May 27, priced at $277 found 2 days ago
Alaska Airlines
Tue, May 20 - Mon, Jun 9
HLN
Helena
BOI
Boise
$283 Roundtrip, found 2 days ago
$283
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, May 20 from Helena to Boise, returning Mon, Jun 9, priced at $283 found 2 days ago
Delta
Tue, Jun 10 - Wed, Jun 18
HLN
Helena
BOI
Boise
$295 Roundtrip, found 1 day ago
$295
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Jun 10 from Helena to Boise, returning Wed, Jun 18, priced at $295 found 1 day ago
Alaska Airlines
Tue, Sep 2 - Tue, Sep 9
HLN
Helena
BOI
Boise
$296 Roundtrip, found 5 days ago
$296
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Sep 2 from Helena to Boise, returning Tue, Sep 9, priced at $296 found 5 days ago
Hawaiian Airlines
Wed, May 14 - Sat, May 31
HLN
Helena
BOI
Boise
$297 Roundtrip, found 5 days ago
$297
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Wed, May 14 from Helena to Boise, returning Sat, May 31, priced at $297 found 5 days ago
Delta
Wed, May 21 - Wed, May 28
HLN
Helena
BOI
Boise
$303 Roundtrip, found 2 days ago
$303
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, May 21 from Helena to Boise, returning Wed, May 28, priced at $303 found 2 days ago
Alaska Airlines
Mon, May 19 - Tue, Jun 10
HLN
Helena
BOI
Boise
$304 Roundtrip, found 2 days ago
$304
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, May 19 from Helena to Boise, returning Tue, Jun 10, priced at $304 found 2 days ago
Flights from Helena (HLN) to Boise (BOI)
Origin airport
Helena Regional
Destination airport
Boise
Airlines serving
Alaska Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$252
Distance
294 mi

Helena to Boise Flights

The cheapest times to fly from Helena to Boise

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

 

The best time to book a flight from Helena to Boise

Sunday is one of the best days to book for cheap flights from Helena to Boise: 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 Helena to Boise

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 Helena to Boise in 2025. You can also book with separate airlines for your outbound and return journeys, from $126 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 Helena to Boise 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 Helena to Boise 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.

 

Frequently asked questions

How much does a flight from Helena Regional Airport (HLN) to Boise Airport (BOI) cost?
Discover the latest flight deals from HLN to BOI by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from HLN to BOI?
The cheapest flights from HLN to BOI are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from HLN to BOI?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from HLN to BOI. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Helena Regional Airport (HLN) to Boise Airport (BOI)?
There aren’t any daily nonstop flights departing from Helena Regional Airport (HLN) to Boise Airport (BOI). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you’ll be cruising above the clouds in no time.
What day of the week has the most flights from HLN to BOI?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary based on a range of factors, including the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Helena Regional Airport (HLN) to Boise Airport (BOI)?
To avoid potential delays on the Helena Regional Airport (HLN) to Boise Airport (BOI) route, fly before 3 PM. Flights after this time are 22% more likely to be canceled.**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 Helena Regional Airport (HLN) to Boise Airport (BOI) last-minute?
Last-minute bookings from HLN to BOI are generally more expensive. For the best rates, start searching for flights well ahead of time. That said, if your travel plans are flexible, it’s possible to score a cheap ticket right before your journey.
Is it cheaper to book a HLN to BOI flight and hotel package?
Booking a HLN to BOI flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Select from our extensive range of stays and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Helena Regional Airport (HLN) to Boise Airport (BOI)?
If you booked your HLN to BOI flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

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*Available to One Key members.