What airlines fly to Helena?

Alaska Airlines, Delta and United 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 85% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 3 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

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

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

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 September 2026.

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.

$213 Cheap Flights from Portland to Helena in 2026

Discover deals from 900+ travel sites with momondo.

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.

5:00 am - 3:31 pmPDX Portland-HLN Helena

9h 31m1 stop Seattle/Tacoma Intl

4:08 pm - 12:10 amHLN Helena-PDX Portland

9h 02m1 stop Seattle/Tacoma Intl

$313Alaska Airlines

Sat, Dec 12 - Tue, Dec 15

9:40 am - 3:31 pmPDX Portland-HLN Helena

4h 51m1 stop Seattle/Tacoma Intl

4:08 pm - 4:50 pmHLN Helena-PDX Portland

25h 42m2 stops Seattle/Tacoma Intl San Francisco

$351Alaska Airlines

Sat, Dec 12 - Tue, Dec 15

11:03 am - 4:49 pmPDX Portland-HLN Helena

4h 46m1 stop Seattle/Tacoma Intl

5:26 pm - 8:28 amHLN Helena-PDX Portland

16h 02m1 stop Seattle/Tacoma Intl

$404Alaska Airlines

Fri, Oct 16 - Sun, Oct 18

5:00 am - 3:31 pmPDX Portland-HLN Helena

9h 31m1 stop Seattle/Tacoma Intl

4:08 pm - 12:10 amHLN Helena-PDX Portland

9h 02m1 stop Seattle/Tacoma Intl

$413Alaska Airlines

Sat, Dec 12 - Tue, Dec 15

9:31 am - 4:49 pmPDX Portland-HLN Helena

6h 18m1 stop Seattle/Tacoma Intl

5:26 pm - 11:02 pmHLN Helena-PDX Portland

6h 36m1 stop Seattle/Tacoma Intl

$419Alaska Airlines

Tue, Oct 20 - Sat, Oct 24

8:44 pm - 12:28 pmPDX Portland-HLN Helena

14h 44m2 stops Seattle/Tacoma Intl Salt Lake City

1:08 pm - 8:00 pmHLN Helena-PDX Portland

7h 52m2 stops Salt Lake City Seattle/Tacoma Intl

$433Delta

Tue, Oct 20 - Sat, Oct 24

5:15 pm - 10:24 pmPDX Portland-HLN Helena

4h 09m1 stop Salt Lake City

1:08 pm - 9:56 pmHLN Helena-PDX Portland

9h 48m2 stops Salt Lake City Seattle/Tacoma Intl

$464Delta

Wed, Oct 21 - Fri, Oct 23

5:33 am - 12:28 pmPDX Portland-HLN Helena

5h 55m1 stop Salt Lake City

1:08 pm - 9:56 pmHLN Helena-PDX Portland

9h 48m2 stops Salt Lake City Seattle/Tacoma Intl

$464Delta

Tue, Oct 20 - Fri, Oct 23

5:15 pm - 10:24 pmPDX Portland-HLN Helena

4h 09m1 stop Salt Lake City

7:15 am - 12:03 pmHLN Helena-PDX Portland

5h 48m1 stop Salt Lake City

$465Delta

Tue, Oct 20 - Fri, Oct 23

5:00 am - 9:18 pmPDX Portland-HLN Helena

15h 18m1 stop Denver Intl

6:25 am - 9:10 pmHLN Helena-PDX Portland

15h 45m1 stop Denver Intl

$895United Airlines

Thu, Sep 24 - Sun, Sep 27

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Alaska Airlines flights from Portland to Helena

Our best Alaska Airlines deals on Portland to Helena flight tickets

Alaska Airlines

Dec 12

PDX5:00 amPortland

9h 31m

1 stop

HLN3:31 pmHelena

Dec 15

HLN4:08 pmHelena

9h 02m

1 stop

PDX12:10 amPortland

$313

Alaska Airlines

Dec 12

PDX9:40 amPortland

4h 51m

1 stop

HLN3:31 pmHelena

Dec 15

HLN4:08 pmHelena

25h 42m

2 stops

PDX4:50 pmPortland

$351

Alaska Airlines

Oct 16

PDX11:03 amPortland

4h 46m

1 stop

HLN4:49 pmHelena

Oct 18

HLN5:26 pmHelena

16h 02m

1 stop

PDX8:28 amPortland

$404

Delta flights from Portland to Helena

Our best Delta deals on Portland to Helena flight tickets

Delta

Oct 20

PDX8:44 pmPortland

14h 44m

2 stops

HLN12:28 pmHelena

Oct 24

HLN1:08 pmHelena

7h 52m

2 stops

PDX8:00 pmPortland

$433

Delta

Oct 20

PDX5:15 pmPortland

4h 09m

1 stop

HLN10:24 pmHelena

Oct 23

HLN7:15 amHelena

5h 48m

1 stop

PDX12:03 pmPortland

$465

Delta

Oct 22

PDX5:33 amPortland

5h 55m

1 stop

HLN12:28 pmHelena

Oct 23

HLN1:08 pmHelena

9h 48m

2 stops

PDX9:56 pmPortland

$484

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Sat 12/12

5:00 am-3:31 pm

1 stop9h 31m

Helena

Tue 12/15

4:08 pm-12:10 am

1 stop9h 02m

$313

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Sat 12/12

9:40 am-3:31 pm

1 stop4h 51m

Helena

Tue 12/15

4:08 pm-4:50 pm

2 stops25h 42m

$351

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Fri 10/16

11:03 am-4:49 pm

1 stop4h 46m

Helena

Sun 10/18

5:26 pm-8:28 am

1 stop16h 02m

$404

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Sat 12/12

5:00 am-3:31 pm

1 stop9h 31m

Helena

Tue 12/15

4:08 pm-12:10 am

1 stop9h 02m

$413

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Tue 10/20

9:31 am-4:49 pm

1 stop6h 18m

Helena

Sat 10/24

5:26 pm-11:02 pm

1 stop6h 36m

$419

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Tue 10/20

8:44 pm-12:28 pm

2 stops14h 44m

Helena

Sat 10/24

1:08 pm-8:00 pm

2 stops7h 52m

$433

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Wed 10/21

5:15 pm-10:24 pm

1 stop4h 09m

Helena

Fri 10/23

1:08 pm-9:56 pm

2 stops9h 48m

$464

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Tue 10/20

5:33 am-12:28 pm

1 stop5h 55m

Helena

Fri 10/23

1:08 pm-9:56 pm

2 stops9h 48m

$464

Quickest round-trip

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Tue 10/20

5:15 pm-10:24 pm

1 stop4h 09m

Helena

Fri 10/23

7:15 am-12:03 pm

1 stop5h 48m

$465

PortlandHelena

PDX Portland - HLN Helena

PDXHLN

Portland

Thu 9/24

5:00 am-9:18 pm

1 stop15h 18m

Helena

Sun 9/27

6:25 am-9:10 pm

1 stop15h 45m

$895

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 October, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $367.

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

Best Price Found	$213
Fastest flight time	5h 37m
Direct flights	None

The best one-way flight to Helena from Portland in the past 72 hours is $213. The best round-trip flight deal from Portland to Helena found on momondo in the last 72 hours is $313.

The fastest flight from Portland to Helena takes 5h 37m

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

Search flight deals

Frequently asked questions about flying from Portland to Helena

How far is Portland to Helena by plane?
Helena is 514.7 mi away from Portland. A reasonable flight in good conditions will take 5h 37m.
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 September 2026.
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 Alaska Airlines, representing 73% of all bookings. The subsequent popular airline is Delta at 27%.

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
Delta	PriceFrom $158	Free Cancellation	Rating 7.8 8,552 reviews		Search Delta flights
Alaska Airlines	PriceFrom $367	Free Cancellation	Rating 7.9 12,887 reviews		Search Alaska Airlines 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.