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Cheap flights from Portland to Helena from $153

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Helena departing on 9/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Portland to Helena

Cheap round-trip flights

Alaska Airlines Logo
6:05 am - 3:21 pmPDX-HLN
8h 16m1 stop
Alaska Airlines Logo
4:02 pm - 10:47 pmHLN-PDX
7h 45m1 stop
$302Alaska Airlines
Find Deal
Wed, Sep 10 - Wed, Sep 17
Alaska Airlines Logo
7:02 am - 3:21 pmPDX-HLN
7h 19m2 stops
Alaska Airlines Logo
4:02 pm - 10:47 pmHLN-PDX
7h 45m1 stop
$341Alaska Airlines
Find Deal
Wed, Sep 10 - Wed, Sep 17
Alaska Airlines Logo
6:05 am - 3:21 pmPDX-HLN
8h 16m1 stop
Alaska Airlines Logo
6:18 pm - 1:34 pmHLN-PDX
20h 16m2 stops
$351Alaska Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Alaska Airlines Logo
7:10 am - 3:21 pmPDX-HLN
7h 11m2 stops
Alaska Airlines Logo
4:02 pm - 6:20 amHLN-PDX
15h 18m2 stops
$358Alaska Airlines
Find Deal
Wed, Sep 10 - Wed, Sep 17
Delta Logo
5:35 am - 12:20 pmPDX-HLN
5h 45m1 stop
Delta Logo
5:50 am - 8:51 amHLN-PDX
4h 01m1 stop
$372Delta
Find Deal
Wed, Sep 3 - Sat, Sep 6
Delta Logo
5:30 am - 12:20 pmPDX-HLN
5h 50m1 stop
Delta Logo
5:45 am - 8:55 amHLN-PDX
4h 10m1 stop
$403Delta
Find Deal
Thu, Sep 25 - Sun, Sep 28
Delta Logo
5:30 am - 12:20 pmPDX-HLN
5h 50m1 stop
Delta Logo
5:45 am - 8:55 amHLN-PDX
4h 10m1 stop
$439Delta
Find Deal
Thu, Sep 25 - Sun, Sep 28
United Airlines Logo
5:00 am - 9:11 pmPDX-HLN
15h 11m1 stop
United Airlines Logo
5:20 pm - 9:28 amHLN-PDX
17h 08m1 stop
$494United Airlines
Find Deal
Mon, Sep 1 - Fri, Sep 5
United Airlines Logo
5:00 am - 4:04 pmPDX-HLN
10h 04m1 stop
United Airlines Logo
6:30 am - 9:01 pmHLN-PDX
15h 31m1 stop
$515United Airlines
Find Deal
Fri, Sep 5 - Sun, Sep 7
United Airlines Logo
3:44 pm - 9:11 pmPDX-HLN
28h 27m2 stops
United Airlines Logo
5:20 pm - 9:01 pmHLN-PDX
28h 41m1 stop
$555United Airlines
Find Deal
Wed, Sep 3 - Sat, Sep 6

Alaska Airlines flights from Portland to Helena

Our best Alaska Airlines deals on Portland to Helena flight tickets
Alaska Airlines
Sep 10
PDX6:05 amPortland
8h 16m
1 stop
HLN3:21 pmHelena
Sep 17
HLN4:02 pmHelena
7h 45m
1 stop
PDX10:47 pmPortland
$302
Find similar
Alaska Airlines
Sep 10
PDX7:02 amPortland
7h 19m
2 stops
HLN3:21 pmHelena
Sep 17
HLN4:02 pmHelena
7h 45m
1 stop
PDX10:47 pmPortland
$341
Find similar
Alaska Airlines
Sep 30
PDX6:05 amPortland
8h 16m
1 stop
HLN3:21 pmHelena
Oct 4
HLN6:18 pmHelena
20h 16m
2 stops
PDX1:34 pmPortland
$351
Find similar

Delta flights from Portland to Helena

Our best Delta deals on Portland to Helena flight tickets
Delta
Sep 3
PDX5:35 amPortland
5h 45m
1 stop
HLN12:20 pmHelena
Sep 6
HLN5:50 amHelena
4h 01m
1 stop
PDX8:51 amPortland
$372
Find similar
Delta
Sep 25
PDX5:30 amPortland
5h 50m
1 stop
HLN12:20 pmHelena
Sep 28
HLN5:45 amHelena
4h 10m
1 stop
PDX8:55 amPortland
$403
Find similar
Delta
Sep 25
PDX5:30 amPortland
5h 50m
1 stop
HLN12:20 pmHelena
Sep 28
HLN5:45 amHelena
4h 10m
1 stop
PDX8:55 amPortland
$439
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland to Helena that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 14, 2025.
Use the filters below to find and compare flights from Portland to Helena that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandHelena

PDX - HLN

PDXHLN

Portland

Wed 9/10

6:05 am-3:21 pm

1 stop8h 16m

Helena

Wed 9/17

4:02 pm-10:47 pm

1 stop7h 45m

$302

PortlandHelena

PDX - HLN

PDXHLN

Portland

Wed 9/10

7:02 am-3:21 pm

2 stops7h 19m

Helena

Wed 9/17

4:02 pm-10:47 pm

1 stop7h 45m

$341

PortlandHelena

PDX - HLN

PDXHLN

Portland

Tue 9/30

6:05 am-3:21 pm

1 stop8h 16m

Helena

Sat 10/4

6:18 pm-1:34 pm

2 stops20h 16m

$351

PortlandHelena

PDX - HLN

PDXHLN

Portland

Wed 9/10

7:10 am-3:21 pm

2 stops7h 11m

Helena

Wed 9/17

4:02 pm-6:20 am

2 stops15h 18m

$358

PortlandHelena

PDX - HLN

PDXHLN

Portland

Wed 9/3

5:35 am-12:20 pm

1 stop5h 45m

Helena

Sat 9/6

5:50 am-8:51 am

1 stop4h 01m

$372

PortlandHelena

PDX - HLN

PDXHLN

Portland

Thu 9/25

5:30 am-12:20 pm

1 stop5h 50m

Helena

Sun 9/28

5:45 am-8:55 am

1 stop4h 10m

$403

PortlandHelena

PDX - HLN

PDXHLN

Portland

Thu 9/25

5:30 am-12:20 pm

1 stop5h 50m

Helena

Sun 9/28

5:45 am-8:55 am

1 stop4h 10m

$439

PortlandHelena

PDX - HLN

PDXHLN

Portland

Mon 9/1

5:00 am-9:11 pm

1 stop15h 11m

Helena

Fri 9/5

5:20 pm-9:28 am

1 stop17h 08m

$494

PortlandHelena

PDX - HLN

PDXHLN

Portland

Fri 9/5

5:00 am-4:04 pm

1 stop10h 04m

Helena

Sun 9/7

6:30 am-9:01 pm

1 stop15h 31m

$515

PortlandHelena

PDX - HLN

PDXHLN

Portland

Wed 9/3

3:44 pm-9:11 pm

2 stops28h 27m

Helena

Sat 9/6

5:20 pm-9:01 pm

1 stop28h 41m

$555

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Helena from

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

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 December is also cheap. Prices for this month can be found on momondo for an average of $288.

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

Best Price Found

$153

Fastest flight time

4h 04m

Direct flights

None

Airports in Helena

1 airport
The best one-way flight to Helena from Portland in the past 72 hours is $153. The best round-trip flight deal from Portland to Helena found on momondo in the last 72 hours is $302.
The fastest flight from Portland to Helena takes 4h 04m
There are no direct flights from Portland to Helena. Popular non-direct route for this connection is Portland Airport - Helena Airport.
There is 1 airport near Helena: Helena (HLN)
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 5h 45m.

  • 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?

  • 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?

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 AirlinesPriceFrom $287Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
DeltaPriceFrom $288Free CancellationRating
8.0
7,980 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.

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