$145 Cheap Flights from Portland (PDX) to Helena (HLN)

View $145 flight on Wed, Dec 3, 2025Opens in a new window

Popular airlines from Portland International Airport (PDX) to Helena, MT (HLN-Helena Regional)

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Cheap Flights from Portland to Helena (PDX-HLN)

Prices were available within the past 7 days and start at $145 for one-way flights and $262 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Sat, Nov 1 - Tue, Nov 4
PDX
Portland
HLN
Helena
$262 Roundtrip, found 3 hours ago
$262
Roundtrip
found 3 hours ago
Select Hawaiian Airlines flight, departing Sat, Nov 1 from Portland to Helena, returning Tue, Nov 4, priced at $262 found 3 hours ago
Delta
Tue, Nov 4 - Sat, Nov 8
PDX
Portland
HLN
Helena
$274 Roundtrip, found 3 hours ago
$274
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Nov 4 from Portland to Helena, returning Sat, Nov 8, priced at $274 found 3 hours ago
Delta
Wed, Oct 29 - Sat, Nov 1
PDX
Portland
HLN
Helena
$282 Roundtrip, found 3 hours ago
$282
Roundtrip
found 3 hours ago
Select Delta flight, departing Wed, Oct 29 from Portland to Helena, returning Sat, Nov 1, priced at $282 found 3 hours ago
Alaska Airlines
Tue, Nov 11 - Sat, Nov 22
PDX
Portland
HLN
Helena
$290 Roundtrip, found 15 hours ago
$290
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Tue, Nov 11 from Portland to Helena, returning Sat, Nov 22, priced at $290 found 15 hours ago
Alaska Airlines
Sat, Nov 8 - Sat, Nov 15
PDX
Portland
HLN
Helena
$292 Roundtrip, found 15 hours ago
$292
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Sat, Nov 8 from Portland to Helena, returning Sat, Nov 15, priced at $292 found 15 hours ago
Hawaiian Airlines
Sat, Oct 11 - Tue, Oct 14
PDX
Portland
HLN
Helena
$297 Roundtrip, found 1 day ago
$297
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Sat, Oct 11 from Portland to Helena, returning Tue, Oct 14, priced at $297 found 1 day ago
Hawaiian Airlines
Wed, Oct 8 - Tue, Oct 14
PDX
Portland
HLN
Helena
$301 Roundtrip, found 5 days ago
$301
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Wed, Oct 8 from Portland to Helena, returning Tue, Oct 14, priced at $301 found 5 days ago
Alaska Airlines
Sat, Nov 1 - Tue, Nov 4
PDX
Portland
HLN
Helena
$302 Roundtrip, found 3 hours ago
$302
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Sat, Nov 1 from Portland to Helena, returning Tue, Nov 4, priced at $302 found 3 hours ago
Delta
Sat, Oct 11 - Sat, Oct 18
PDX
Portland
HLN
Helena
$302 Roundtrip, found 1 day ago
$302
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Oct 11 from Portland to Helena, returning Sat, Oct 18, priced at $302 found 1 day ago
United
Tue, Jan 13 - Tue, Jan 27
PDX
Portland
HLN
Helena
$471 Roundtrip, found 5 days ago
$471
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jan 13 from Portland to Helena, returning Tue, Jan 27, priced at $471 found 5 days ago

Find the cheapest month to fly from Portland (PDX) to Helena (HLN)

January is typically the cheapest month to fly

From $202 - $467 per traveler.

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Helena Regional Airport (HLN) cost?
Get a cheap one-way flight from $145 or cheap return flight from $262 from Portland Intl. Airport (PDX) 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 Portland Intl. Airport (PDX) to Helena Regional Airport (HLN)?
The cheapest month to fly from PDX to HLN is November, when demand is low. Off-peak season is usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Helena Regional Airport (HLN)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest PDX to HLN flight.
How many flights per day from Portland Intl. Airport (PDX) to Helena Regional Airport (HLN)?
You'll have to catch a flight with a layover if you're traveling from Portland Intl. Airport (PDX) to Helena Regional Airport (HLN). There are no daily direct flights on this route. However, just filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from PDX to HLN?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Portland Intl. Airport (PDX) to Helena Regional Airport (HLN)?
To avoid possible delays on the Portland Intl. Airport (PDX) to Helena Regional Airport (HLN) route, aim to travel 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 Portland Intl. Airport (PDX) to Helena Regional Airport (HLN) last-minute?
Last-minute bookings from PDX to HLN are typically more expensive. To secure the best prices, start looking for flights early. That said, if you're flexible with your travel dates, it's possible to find a cheap ticket just before your departure.
Is it cheaper to book a PDX to HLN flight and hotel package?
You'll generally save money by securing a PDX to HLN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After selecting your preferred flights and accommodations, consider other add-ons like car rentals, tours and activities.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Helena Regional Airport (HLN)?
If you reserved your PDX to HLN flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare 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, visit our Customer Service portal for more information.

Travel information

Travel information

Origin airport
Portland Intl.
Destination airport
Helena Regional
Airlines serving
Alaska Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$262
Distance
512 mi

Book with confidence

Book with confidence

Portland to Helena Flights

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

 

The best time to book a flight from Portland to Helena

Sunday is one of the best days to book for cheap flights from Portland 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 Portland 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 Portland to Helena in 2025. You can also book with separate airlines for your outbound and return journeys, from $145 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 Portland 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 Portland 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.

 

Portland to Helena Flights

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*Available to One Key members.