HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Helena

$155+ Cheap flights from Portland to Helena (PDX - HLN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — HLN
May 23 — May 301
Sat 5/23
Sat 5/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Helena with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Portland to Helena

Cheapest flights from Portland to Helena
Explore the most affordable flight options available from Portland to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.

This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:05 pm
PDX
-
HLN
1 stop4h 28m
Delta
Tue 5/265:45 am
HLN
-
PDX
1 stop4h 07m
Delta
Deal found 4/19$376
This Alaska Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:00 am
PDX
-
HLN
1 stop10h 06m
Alaska Airlines
Tue 5/194:43 pm
HLN
-
PDX
1 stop5h 45m
Alaska Airlines
Deal found 4/20$383
This Alaska Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:46 pm
PDX
-
HLN
1 stop21h 20m
Alaska Airlines
Tue 5/194:43 pm
HLN
-
PDX
1 stop16h 19m
Alaska Airlines
Deal found 4/20$393
This Alaska Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:46 pm
PDX
-
HLN
1 stop21h 20m
Alaska Airlines
Sun 5/174:43 pm
HLN
-
PDX
1 stop5h 45m
Alaska Airlines
Deal found 4/20$403
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:45 am
PDX
-
HLN
1 stop5h 38m
Delta
Tue 5/195:45 am
HLN
-
PDX
1 stop4h 07m
Delta
Deal found 4/20$414
This Alaska Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/199:44 am
PDX
-
HLN
1 stop5h 22m
Alaska Airlines
Tue 5/264:43 pm
HLN
-
PDX
2 stops18h 06m
Alaska Airlines
Deal found 4/21$415
This Expedia deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/158:44 am
PDX
-
HLN
1 stop6h 22m
Alaska Airlines
Sat 5/164:43 pm
HLN
-
PDX
1 stop5h 45m
Alaska Airlines
Deal found 4/20$419
This Delta deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:05 pm
PDX
-
HLN
1 stop4h 36m
Delta
Tue 10/135:45 am
HLN
-
PDX
1 stop4h 31m
Delta
Deal found 4/18$429
This Expedia deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/109:49 am
PDX
-
HLN
1 stop6h 56m
Alaska Airlines
Sat 5/164:43 pm
HLN
-
PDX
1 stop5h 45m
Alaska Airlines
Deal found 4/22$432
This Alaska Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/119:19 am
PDX
-
HLN
1 stop6h 13m
Alaska Airlines
Mon 6/155:09 pm
HLN
-
PDX
1 stop6h 16m
Alaska Airlines
Deal found 4/20$443

Find flight deals from Portland to Helena

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Helena (HLN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$376
(Delta)

One-way from

$155
(Delta)

Popular in

January

Cheapest in

October

Average price

$421
Provider with most accurate pricing for Portland-Helena flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Helena flights.
Search Deals
From Portland to Helena
Search Deals
One-way flight from Portland to Helena
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated April 23, 2026.
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

Cheapest round-trip

PortlandHelena

PDX - HLN

PDXHLN

Portland

Tue 5/19

9:44 am-4:06 pm

1 stop5h 22m

Helena

Tue 5/26

4:43 pm-9:49 am

2 stops18h 06m

$415

PortlandHelena

PDX - HLN

PDXHLN

Portland

Fri 5/15

9:26 pm-4:06 pm

2 stops17h 40m

Helena

Tue 5/19

4:43 pm-9:28 pm

1 stop5h 45m

$442

PortlandHelena

PDX - HLN

PDXHLN

Portland

Mon 6/8

5:46 pm-4:06 pm

1 stop21h 20m

Helena

Fri 6/26

5:09 pm-10:25 pm

1 stop6h 16m

$463

PortlandHelena

PDX - HLN

PDXHLN

Portland

Thu 5/14

5:00 am-4:06 pm

1 stop10h 06m

Helena

Sat 5/16

4:43 pm-9:28 pm

1 stop5h 45m

$483

PortlandHelena

PDX - HLN

PDXHLN

Portland

Sun 5/10

2:30 pm-5:45 pm

2 stops26h 15m

Helena

Sat 5/16

4:43 pm-9:28 pm

1 stop5h 45m

$502

PortlandHelena

PDX - HLN

PDXHLN

Portland

Fri 5/15

9:07 pm-4:06 pm

2 stops17h 59m

Helena

Mon 5/18

4:43 pm-9:28 pm

1 stop5h 45m

$509

PortlandHelena

PDX - HLN

PDXHLN

Portland

Thu 6/11

9:19 am-4:32 pm

1 stop6h 13m

Helena

Mon 6/15

5:09 pm-9:21 am

2 stops17h 12m

$510

PortlandHelena

PDX - HLN

PDXHLN

Portland

Tue 5/5

10:35 am-5:45 pm

1 stop6h 10m

Helena

Sat 5/9

6:22 pm-10:53 pm

1 stop5h 31m

$555
Quickest round-trip

PortlandHelena

PDX - HLN

PDXHLN

Portland

Mon 5/4

5:45 am-12:24 pm

1 stop5h 39m

Helena

Fri 5/8

5:45 am-8:52 am

1 stop4h 07m

$651

PortlandHelena

PDX - HLN

PDXHLN

Portland

Wed 5/6

6:00 am-5:45 pm

1 stop10h 45m

Helena

Sat 5/9

6:22 pm-10:53 pm

1 stop5h 31m

$651

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/20

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Portland to Helena

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Helena in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Helena flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Helena flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Helena flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Helena flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Helena flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Helena

Have a flexible travel schedule? Discover the best time to fly to Helena from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Helena

What is the cheapest month to book a flight from Portland to Helena?

Currently, October is the cheapest month in which you can book a flight from Portland to Helena (average of $326). Flying from Portland to Helena in January is currently the most expensive (average of $810). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Portland to Helena?

Reviews of airlines servicing Helena

Get insights into the airlines that provide service to Helena. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Helena. Reviews last updated April 23, 2026.
Read through reviews of airlines operating flights from Portland to Helena, such as Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,275 reviews

Crew

8.5

Boarding

8.1

Food

7.0

Entertainment

7.0

Overall

7.9

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Alaska Airlines
7.9
Good
12,275 reviews
Alaska Airlines
7.9
Good
12,275 reviews

Crew

8.5

Boarding

8.1

Food

7.0

Entertainment

7.0

Overall

7.9

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Delta
7.9
Good
8,438 reviews
Alaska Airlines
7.9
Good
12,275 reviews

Crew

8.5

Boarding

8.1

Food

7.0

Entertainment

7.0

Overall

7.9

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Related info for your journey

Find useful and relevant information for your journey from Portland to Helena. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland to Helena?

    Airlines like Alaska Airlines fly from Portland to Helena in about 5h 22m. The time it takes to get you to your destination can typically vary by up to . Portland and Helena are separated by a distance of 512 mi.

  • What are the cheapest airlines flying from Portland to Helena round-trip?

    Cheapflights users have booked flights from Portland to Helena round-trip from $158. Another airline that can offer you cheap pricing is Alaska Airlines. You may be able to fly from Portland to Helena for 68% less than the average price by searching for these airlines.

  • Can I find deals for flights from Portland to Helena that include hotel bookings?

    Yes. In addition to deals on Portland to Helena flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Helena?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Helena.

  • Can I find deals for business class flights from Portland to Helena?

    Yes. Cheapflights offers flight deals from Portland to Helena by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Helena?

    Currently, October is the cheapest month in which you can book a flight from Portland to Helena (average of $326). Flying from Portland to Helena in January is currently the most expensive (average of $810). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Portland to Helena

Discover the top 2 airlines that operate flights from Portland to Helena. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$158Average$443FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$335Average$455FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights