What is the cheapest airline that flies from Portland to Helena?

Delta, Alaska Airlines, and United Airlines are the most popular carriers operating from Portland to Helena

What airlines fly to Helena?

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to Helena from Portland according to our data. Alaska Airlines is the first choice among our users, with 73% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 4 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Portland Airport to Helena Airport?

Prices for flights from Portland Airport to Helena Airport refresh daily.

How many operators does momondo search for flights from Portland Airport to Helena Airport?

The number of operators available for flights from Portland Airport to Helena Airport is 2 as of November 2025.

How old do you have to be to fly from Portland Airport to Helena Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Helena Airport.

What documentation or ID do you need to fly to Helena Airport?

The required travel and health documents for your Helena Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Helena Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$230 Cheap Flights from Portland to Helena in 2025/26

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Find the cheapest flights from Portland to Helena

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:30 am - 3:59 pmPDX-HLN

4h 29m1 stop

4:36 pm - 11:46 pmHLN-PDX

8h 10m1 stop

$293Alaska Airlines

Find Deal

Sun, Mar 8 - Sat, Mar 14

5:49 pm - 5:51 pmPDX-HLN

23h 02m1 stop

6:32 pm - 1:50 pmHLN-PDX

20h 18m2 stops

$313Alaska Airlines

Find Deal

Fri, Dec 12 - Fri, Dec 19

5:49 pm - 5:51 pmPDX-HLN

23h 02m1 stop

6:32 pm - 12:12 amHLN-PDX

6h 40m1 stop

$314Alaska Airlines

Find Deal

Fri, Dec 12 - Fri, Dec 19

7:15 am - 3:59 pmPDX-HLN

31h 44m2 stops

4:36 pm - 7:15 pmHLN-PDX

3h 39m1 stop

$326Alaska Airlines

Find Deal

Sun, Mar 8 - Sat, Mar 14

7:15 am - 3:59 pmPDX-HLN

31h 44m2 stops

4:36 pm - 9:42 amHLN-PDX

18h 06m2 stops

$375Alaska Airlines

Find Deal

Sun, Mar 8 - Sat, Mar 14

9:40 am - 3:38 pmPDX-HLN

4h 58m1 stop

4:10 pm - 8:43 pmHLN-PDX

5h 33m1 stop

$396Hawaiian Airlines

Find Deal

Wed, Apr 15 - Sat, Apr 18

7:18 am - 5:51 pmPDX-HLN

9h 33m2 stops

6:32 pm - 1:50 pmHLN-PDX

20h 18m2 stops

$430Alaska Airlines

Find Deal

Fri, Dec 12 - Fri, Dec 19

9:40 am - 3:38 pmPDX-HLN

4h 58m1 stop

4:10 pm - 11:20 pmHLN-PDX

8h 10m2 stops

$446Alaska Airlines

Find Deal

Wed, Apr 15 - Sat, Apr 18

6:14 am - 5:55 pmPDX-HLN

10h 41m1 stop

6:32 pm - 12:13 pmHLN-PDX

18h 41m1 stop

$483Alaska Airlines

Find Deal

Fri, Dec 19 - Fri, Jan 2

5:10 am - 5:55 pmPDX-HLN

11h 45m1 stop

6:32 pm - 6:18 amHLN-PDX

12h 46m2 stops

$502Alaska Airlines

Find Deal

Fri, Dec 19 - Fri, Jan 2

Alaska Airlines flights from Portland to Helena

Our best Alaska Airlines deals on Portland to Helena flight tickets

Alaska Airlines

Mar 8

PDX10:30 amPortland

4h 29m

1 stop

HLN3:59 pmHelena

Mar 14

HLN4:36 pmHelena

8h 10m

1 stop

PDX11:46 pmPortland

$293

Find similar

Alaska Airlines

Dec 12

PDX5:49 pmPortland

23h 02m

1 stop

HLN5:51 pmHelena

Dec 19

HLN6:32 pmHelena

20h 18m

2 stops

PDX1:50 pmPortland

$313

Find similar

Alaska Airlines

Dec 12

PDX5:49 pmPortland

23h 02m

1 stop

HLN5:51 pmHelena

Dec 19

HLN6:32 pmHelena

6h 40m

1 stop

PDX12:12 amPortland

$314

Find similar

United Airlines flights from Portland to Helena

Our best United Airlines deals on Portland to Helena flight tickets

United Airlines

Dec 2

PDX6:00 amPortland

30h 47m

3 stops

HLN1:47 pmHelena

Dec 6

HLN6:30 amHelena

29h 33m

2 stops

PDX11:03 amPortland

$688

Find similar

United Airlines

Nov 22

PDX3:54 pmPortland

20h 33m

2 stops

HLN1:27 pmHelena

Nov 29

HLN6:40 amHelena

20h 23m

1 stop

PDX2:03 amPortland

$872

Find similar

United Airlines

Nov 22

PDX6:00 amPortland

30h 27m

3 stops

HLN1:27 pmHelena

Nov 29

HLN6:40 amHelena

15h 46m

1 stop

PDX9:26 pmPortland

$923

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandHelena

PDX - HLN

PDXHLN

Portland

Sun 3/8

10:30 am-3:59 pm

1 stop4h 29m

Helena

Sat 3/14

4:36 pm-11:46 pm

1 stop8h 10m

$293

PortlandHelena

PDX - HLN

PDXHLN

Portland

Fri 12/12

5:49 pm-5:51 pm

1 stop23h 02m

Helena

Fri 12/19

6:32 pm-1:50 pm

2 stops20h 18m

$313

PortlandHelena

PDX - HLN

PDXHLN

Portland

Fri 12/12

5:49 pm-5:51 pm

1 stop23h 02m

Helena

Fri 12/19

6:32 pm-12:12 am

1 stop6h 40m

$314

PortlandHelena

PDX - HLN

PDXHLN

Portland

Sun 3/8

7:15 am-3:59 pm

2 stops31h 44m

Helena

Sat 3/14

4:36 pm-7:15 pm

1 stop3h 39m

$326

PortlandHelena

PDX - HLN

PDXHLN

Portland

Sun 3/8

7:15 am-3:59 pm

2 stops31h 44m

Helena

Sat 3/14

4:36 pm-9:42 am

2 stops18h 06m

$375

PortlandHelena

PDX - HLN

PDXHLN

Portland

Wed 4/15

9:40 am-3:38 pm

1 stop4h 58m

Helena

Sat 4/18

4:10 pm-8:43 pm

1 stop5h 33m

$396

PortlandHelena

PDX - HLN

PDXHLN

Portland

Fri 12/12

7:18 am-5:51 pm

2 stops9h 33m

Helena

Fri 12/19

6:32 pm-1:50 pm

2 stops20h 18m

$430

PortlandHelena

PDX - HLN

PDXHLN

Portland

Wed 4/15

9:40 am-3:38 pm

1 stop4h 58m

Helena

Sat 4/18

4:10 pm-11:20 pm

2 stops8h 10m

$446

PortlandHelena

PDX - HLN

PDXHLN

Portland

Fri 12/19

6:14 am-5:55 pm

1 stop10h 41m

Helena

Fri 1/2

6:32 pm-12:13 pm

1 stop18h 41m

$483

PortlandHelena

PDX - HLN

PDXHLN

Portland

Fri 12/19

5:10 am-5:55 pm

1 stop11h 45m

Helena

Fri 1/2

6:32 pm-6:18 am

2 stops12h 46m

$502

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

How to get the cheapest flight ticket from Portland to Helena

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Helena?

If you aren’t able to travel to Helena during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $326.

What is the cheapest day to depart on your flight to Helena?

The cheapest day to depart from Portland to Helena is on a Saturday. Travelers who choose to depart for Helena on a Saturday will often find tickets for as low as $321. The most expensive day to fly to Helena is Monday, with ticket prices averaging around $611.

What is the cheapest time of day to depart on your flight to Helena?

According to our data, the cheapest time of day to fly to Helena is in the afternoon. momondo users have found flights departing from Portland to Helena in the afternoon for as low as $354. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Helena is in the morning when prices are around $443.

When to book flights from Portland to Helena

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Helena according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Portland to Helena (PDX to HLN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Helena

Direct flights	None

There are no direct flights from Portland to Helena. There are no popular flight routes from Portland to Helena.

Search flight deals

How far is Portland to Helena by plane?
Helena is 514.7 mi away from Portland. A reasonable flight in good conditions will take 4h 29m.
When did momondo last update prices for flights from Portland Airport to Helena Airport?
Prices for flights from Portland Airport to Helena Airport refresh daily.
How many operators does momondo search for flights from Portland Airport to Helena Airport?
The number of operators available for flights from Portland Airport to Helena Airport is 2 as of November 2025.
How old do you have to be to fly from Portland Airport to Helena Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Helena Airport.
What documentation or ID do you need to fly to Helena Airport?
The required travel and health documents for your Helena Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Helena Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Portland to Helena?
momondo data reveals that the most frequently booked airline on the route from Portland to Helena is Delta, representing 53% of all bookings. The subsequent popular airline is Alaska Airlines at 47%.

Best airlines flying from Portland to Helena

Compare and see reviews for airlines that fly from Portland to Helena with momondo

Airline	Rating	Free Cancellation	Price
Alaska Airlines	PriceFrom $286	Free Cancellation	Rating 8.0 11,309 reviews		Search Alaska Airlines flights
Delta	PriceFrom $288	Free Cancellation	Rating 7.9 8,006 reviews		Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Helena?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Helena from Portland.

Can I find flights from Portland to Helena with flexible booking policies on momondo?

Flights from Portland to Helena with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Portland to Helena?

momondo helps you find the best flight between Portland and Helena by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Portland to Helena right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Helena from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.