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Cheap flights from Helena to Portland from $213

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to Portland departing on 9/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Helena to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
5:18 pm - 10:01 pmHLN  Helena-PDX Portland
5h 43m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
11:48 am - 4:41 pmPDX  Portland-HLN Helena
3h 53m1 stop Seattle/Tacoma Intl
$403Alaska Airlines
Sat, Sep 19 - Tue, Sep 22
Alaska Airlines Logo
4:41 pm - 9:55 pmHLN  Helena-PDX Portland
6h 14m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
5:05 am - 4:04 pmPDX  Portland-HLN Helena
9h 59m1 stop Seattle/Tacoma Intl
$403Alaska Airlines
Sat, Nov 7 - Tue, Nov 10
Alaska Airlines Logo
4:41 pm - 11:00 pmHLN  Helena-PDX Portland
7h 19m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
5:40 pm - 4:04 pmPDX  Portland-HLN Helena
21h 24m1 stop Seattle/Tacoma Intl
$403Alaska Airlines
Sat, Nov 7 - Tue, Nov 10
Alaska Airlines Logo
4:41 pm - 9:55 pmHLN  Helena-PDX Portland
6h 14m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
8:05 am - 4:04 pmPDX  Portland-HLN Helena
6h 59m1 stop Seattle/Tacoma Intl
$403Alaska Airlines
Sat, Nov 7 - Tue, Nov 10
Alaska Airlines Logo
5:18 pm - 1:37 pmHLN  Helena-PDX Portland
21h 19m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
11:48 am - 4:41 pmPDX  Portland-HLN Helena
3h 53m1 stop Seattle/Tacoma Intl
$413Alaska Airlines
Fri, Sep 25 - Tue, Sep 29
Delta Logo
1:04 pm - 11:56 pmHLN  Helena-PDX Portland
11h 52m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
6:00 am - 12:24 pmPDX  Portland-HLN Helena
5h 24m1 stop Salt Lake City
$414Delta
Wed, Dec 9 - Wed, Dec 30
Delta Logo
1:04 pm - 9:56 pmHLN  Helena-PDX Portland
9h 52m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
6:00 am - 12:24 pmPDX  Portland-HLN Helena
5h 24m1 stop Salt Lake City
$414Delta
Sat, Dec 12 - Tue, Dec 29
Delta Logo
1:04 pm - 9:56 pmHLN  Helena-PDX Portland
9h 52m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
6:00 am - 12:24 pmPDX  Portland-HLN Helena
5h 24m1 stop Salt Lake City
$414Delta
Wed, Dec 9 - Tue, Dec 29
Delta Logo
1:04 pm - 9:56 pmHLN  Helena-PDX Portland
9h 52m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
6:00 am - 12:24 pmPDX  Portland-HLN Helena
5h 24m1 stop Salt Lake City
$414Delta
Sat, Dec 12 - Wed, Dec 30
Delta Logo
1:04 pm - 8:52 amHLN  Helena-PDX Portland
20h 48m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
6:00 am - 12:24 pmPDX  Portland-HLN Helena
5h 24m1 stop Salt Lake City
$424Delta
Fri, Dec 11 - Wed, Dec 30

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Delta flights from Helena to Portland

Our best Delta deals on Helena to Portland flight tickets
Delta
Dec 9
HLN1:04 pmHelena
11h 52m
2 stops
PDX11:56 pmPortland
Dec 30
PDX6:00 amPortland
5h 24m
1 stop
HLN12:24 pmHelena
$414
Delta
Dec 11
HLN1:04 pmHelena
20h 48m
2 stops
PDX8:52 amPortland
Dec 30
PDX6:00 amPortland
5h 24m
1 stop
HLN12:24 pmHelena
$424
Delta
Dec 9
HLN7:00 amHelena
6h 08m
1 stop
PDX12:08 pmPortland
Dec 29
PDX6:00 amPortland
5h 24m
1 stop
HLN12:24 pmHelena
$425

Alaska Airlines flights from Helena to Portland

Our best Alaska Airlines deals on Helena to Portland flight tickets
Alaska Airlines
Nov 7
HLN4:41 pmHelena
6h 14m
1 stop
PDX9:55 pmPortland
Nov 10
PDX8:05 amPortland
6h 59m
1 stop
HLN4:04 pmHelena
$403
Alaska Airlines
Sep 25
HLN5:18 pmHelena
21h 19m
1 stop
PDX1:37 pmPortland
Sep 29
PDX11:48 amPortland
3h 53m
1 stop
HLN4:41 pmHelena
$413
Alaska Airlines
Nov 7
HLN4:41 pmHelena
5h 09m
1 stop
PDX8:50 pmPortland
Nov 10
PDX2:47 pmPortland
24h 17m
2 stops
HLN4:04 pmHelena
$465

momondo Fare Finder

 
Customize your flight search to find flights from Helena to Portland 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 11, 2026.
Use the filters below to find and compare flights from Helena to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Sat 9/19

5:18 pm-10:01 pm

1 stop5h 43m

Portland

Tue 9/22

11:48 am-4:41 pm

1 stop3h 53m

$403

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Sat 11/7

4:41 pm-9:55 pm

1 stop6h 14m

Portland

Tue 11/10

5:05 am-4:04 pm

1 stop9h 59m

$403

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Sat 11/7

4:41 pm-11:00 pm

1 stop7h 19m

Portland

Tue 11/10

5:40 pm-4:04 pm

1 stop21h 24m

$403

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Sat 11/7

4:41 pm-9:55 pm

1 stop6h 14m

Portland

Tue 11/10

8:05 am-4:04 pm

1 stop6h 59m

$403

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Fri 9/25

5:18 pm-1:37 pm

1 stop21h 19m

Portland

Tue 9/29

11:48 am-4:41 pm

1 stop3h 53m

$413

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Wed 12/9

1:04 pm-11:56 pm

2 stops11h 52m

Portland

Wed 12/30

6:00 am-12:24 pm

1 stop5h 24m

$414

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Sat 12/12

1:04 pm-9:56 pm

2 stops9h 52m

Portland

Tue 12/29

6:00 am-12:24 pm

1 stop5h 24m

$414

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Wed 12/9

1:04 pm-9:56 pm

2 stops9h 52m

Portland

Tue 12/29

6:00 am-12:24 pm

1 stop5h 24m

$414

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Sat 12/12

1:04 pm-9:56 pm

2 stops9h 52m

Portland

Wed 12/30

6:00 am-12:24 pm

1 stop5h 24m

$414

HelenaPortland

HLN Helena - PDX Portland

HLNPDX

Helena

Fri 12/11

1:04 pm-8:52 am

2 stops20h 48m

Portland

Wed 12/30

6:00 am-12:24 pm

1 stop5h 24m

$424

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 Portland from

How to get the cheapest flight ticket from Helena to Portland

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 airline that flies from Helena to Portland?

Delta is the most popular carrier operating from Helena to Portland

When to book flights from Helena to Portland

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

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

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

Fastest flight time

3h 40m

Direct flights

None
The fastest flight from Helena to Portland takes 3h 40m
There are no direct flights from Helena to Portland. There are no popular flight routes from Helena to Portland.
Search flight deals

Frequently asked questions about flying from Helena to Portland

  • How far is Helena to Portland by plane?

    Portland is 514.7 mi away from Helena. By plane, this route typically takes 3h 40m.

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

    Prices for flights from Helena Airport to Portland Airport were last updated today.

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

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

  • What documentation or ID do you need to fly to Portland Airport?

    The required travel and health documents for your Portland 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 Portland 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 Helena to Portland?

Best airlines flying from Helena to Portland

Compare and see reviews for airlines that fly from Helena to Portland with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $183Free CancellationRating
7.8
8,505 reviews
Search Delta flights

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Lincoln City
Seaside
Vancouver
Cannon Beach
Salem
Astoria
Long Beach
Beaverton
Rockaway Beach
Hillsboro
Tigard
Depoe Bay
Longview
Hood River
Newberg
Clackamas
Troutdale
Gresham
Kelso
Wilsonville

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Helena to Portland. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Helena to Portland on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Portland from Helena.

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

Yes momondo offers price alerts on flights to Portland from Helena. 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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