$132 Cheap Flights from Portland (PDX) to Helena (HLN)

View $132 flight on Tue, Jun 3, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Portland to Helena (PDX-HLN)

Prices were available within the past 7 days and start at $132 for one-way flights and $265 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, May 28 - Tue, Jun 3
PDX
Portland
HLN
Helena
$265 Roundtrip, found 1 day ago
$265
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, May 28 from Portland to Helena, returning Tue, Jun 3, priced at $265 found 1 day ago
Alaska Airlines
Wed, Jun 4 - Tue, Jun 10
PDX
Portland
HLN
Helena
$283 Roundtrip, found 5 days ago
$283
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Wed, Jun 4 from Portland to Helena, returning Tue, Jun 10, priced at $283 found 5 days ago
Hawaiian Airlines
Tue, May 27 - Wed, Jun 4
PDX
Portland
HLN
Helena
$283 Roundtrip, found 1 day ago
$283
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, May 27 from Portland to Helena, returning Wed, Jun 4, priced at $283 found 1 day ago
Hawaiian Airlines
Tue, May 13 - Wed, May 14
PDX
Portland
HLN
Helena
$284 Roundtrip, found 1 day ago
$284
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, May 13 from Portland to Helena, returning Wed, May 14, priced at $284 found 1 day ago
Delta
Wed, Jun 4 - Tue, Jun 17
PDX
Portland
HLN
Helena
$292 Roundtrip, found 3 days ago
$292
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Jun 4 from Portland to Helena, returning Tue, Jun 17, priced at $292 found 3 days ago
Hawaiian Airlines
Wed, Jun 4 - Wed, Jun 11
PDX
Portland
HLN
Helena
$293 Roundtrip, found 5 days ago
$293
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Wed, Jun 4 from Portland to Helena, returning Wed, Jun 11, priced at $293 found 5 days ago
Hawaiian Airlines
Wed, May 28 - Sat, May 31
PDX
Portland
HLN
Helena
$294 Roundtrip, found 1 day ago
$294
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Wed, May 28 from Portland to Helena, returning Sat, May 31, priced at $294 found 1 day ago
Hawaiian Airlines
Tue, May 27 - Mon, Jun 2
PDX
Portland
HLN
Helena
$303 Roundtrip, found 1 day ago
$303
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, May 27 from Portland to Helena, returning Mon, Jun 2, priced at $303 found 1 day ago
Hawaiian Airlines
Wed, May 21 - Sun, May 25
PDX
Portland
HLN
Helena
$308 Roundtrip, found 6 days ago
$308
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Wed, May 21 from Portland to Helena, returning Sun, May 25, priced at $308 found 6 days ago
United
Fri, May 30 - Sun, Jun 1
PDX
Portland
HLN
Helena
$505 Roundtrip, found 1 day ago
$505
Roundtrip
found 1 day ago
Select United flight, departing Fri, May 30 from Portland to Helena, returning Sun, Jun 1, priced at $505 found 1 day ago
Flights from Portland (PDX) to Helena (HLN)
Origin airport
Portland Intl.
Destination airport
Helena Regional
Airlines serving
Alaska Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$264
Distance
512 mi

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 May. 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 $132 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.

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Helena Regional Airport (HLN) cost?
Discover the latest flight deals from PDX to HLN 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 PDX to HLN?
The cheapest flights from PDX to HLN 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 PDX to HLN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from PDX to HLN. Sort your results by “Price (lowest to highest)” to snap up a great deal.
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.

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*Available to One Key members.