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Flights from Portland to Helena

Find the cheapest flight options from Portland to Helena over the next three months. Book one-way tickets from NZD 703 and round-trip tickets from NZD 446.

      • PDX 10:45
        6h 10m
        1 stop
        HLN 17:55
        Portland - Helena | Mon, Jan 5 | Hawaiian Airlines
        HLN 17:59
        5h 47m
        1 stop
        PDX 22:46
        Helena - Portland | Fri, Jan 9 | Hawaiian Airlines
        NZD 446 NZD 1,894
        76% OFF
        76% OFF
        NZD 1,894 NZD 446
      • PDX 05:50
        5h 37m
        1 stop
        HLN 12:27
        Portland - Helena | Mon, Jan 5 | Delta Air Lines
        HLN 05:30
        4h 33m
        1 stop
        PDX 09:03
        Helena - Portland | Tue, Jan 13 | Delta Air Lines
        NZD 533 NZD 1,894
        72% OFF
        72% OFF
        NZD 1,894 NZD 533
      • PDX 10:45
        6h 10m
        1 stop
        HLN 17:55
        Portland - Helena | Mon, Jan 5 | Alaska Airlines
        HLN 17:59
        5h 47m
        1 stop
        PDX 22:46
        Helena - Portland | Fri, Jan 9 | Hawaiian Airlines
        NZD 585 NZD 1,894
        69% OFF
        69% OFF
        NZD 1,894 NZD 585
      • PDX 05:30
        6h
        1 stop
        HLN 12:30
        Portland - Helena | Sun, Jan 4 | Delta Air Lines
        HLN 05:30
        4h 33m
        1 stop
        PDX 09:03
        Helena - Portland | Sat, Jan 10 | Delta Air Lines
        NZD 644
        66% OFF
        NZD 1,894 NZD 644
      • PDX 17:00
        4h 29m
        1 stop
        HLN 22:29
        Portland - Helena | Sat, Jan 17 | Delta Air Lines
        HLN 05:30
        4h 39m
        1 stop
        PDX 09:09
        Helena - Portland | Sun, Jan 25 | Delta Air Lines
        NZD 716
        62% OFF
        NZD 1,894 NZD 716
      • PDX 05:30
        6h
        1 stop
        HLN 12:30
        Portland - Helena | Mon, Dec 29 | Delta Air Lines
        HLN 13:11
        10h 47m
        1 stop
        PDX 22:58
        Helena - Portland | Sat, Jan 3 | Delta Air Lines
        NZD 942
        50% OFF
        NZD 1,894 NZD 942
      • PDX 05:00
        15h 26m
        1 stop
        HLN 21:26
        Portland - Helena | Thu, Jan 15 | United Airlines
        HLN 06:15
        28h 30m
        1 stop
        PDX 09:45
        Helena - Portland | Fri, Jan 16 | United Airlines
        NZD 1,088
        43% OFF
        NZD 1,894 NZD 1,088
      • PDX 05:30
        6h
        1 stop
        HLN 12:30
        Portland - Helena | Mon, Dec 22 | Delta Air Lines
        HLN 05:30
        4h 38m
        1 stop
        PDX 09:08
        Helena - Portland | Fri, Dec 26 | Delta Air Lines
        NZD 1,248
        34% OFF
        NZD 1,894 NZD 1,248
      • PDX 17:06
        4h 24m
        1 stop
        HLN 22:30
        Portland - Helena | Sat, Dec 20 | Delta Air Lines
        HLN 13:11
        6h 3m
        1 stop
        PDX 18:14
        Helena - Portland | Fri, Dec 26 | Delta Air Lines
        NZD 1,357
        28% OFF
        NZD 1,894 NZD 1,357
      • PDX 05:00
        15h 31m
        1 stop
        HLN 21:31
        Portland - Helena | Fri, Dec 26 | United Airlines
        HLN 14:26
        24h 9m
        1 stop
        PDX 13:35
        Helena - Portland | Tue, Dec 30 | United Airlines
        NZD 1,383
        27% OFF
        NZD 1,894 NZD 1,383
      • PDX 13:00
        17h 25m
        1 stop
        HLN Invalid Date
        Portland - Helena | Sun, Dec 14 | Normal Airline
        HLN 15:00
        6h
        Direct
        PDX 16:00
        Helena - Portland | Tue, Dec 16 | Normal Airline
        Find More Flights
        Find More Flights
      • PDX 10:40
        6h 11m
        1 stop
        HLN 17:51
        Portland - Helena | Sun, Dec 14 | Hawaiian Airlines
        NZD 703 NZD 2,005
        65% OFF
        65% OFF
        NZD 2,005 NZD 703
      • PDX 05:30
        5h 55m
        1 stop
        HLN 12:25
        Portland - Helena | Fri, Dec 19 | Delta Air Lines
        NZD 703 NZD 2,005
        65% OFF
        65% OFF
        NZD 2,005 NZD 703
      • PDX 10:40
        6h 11m
        1 stop
        HLN 17:51
        Portland - Helena | Sun, Dec 14 | Alaska Airlines
        NZD 704 NZD 2,005
        65% OFF
        65% OFF
        NZD 2,005 NZD 704
      • PDX 05:30
        5h 55m
        1 stop
        HLN 12:25
        Portland - Helena | Sun, Dec 14 | Delta Air Lines
        NZD 707
        65% OFF
        NZD 2,005 NZD 707
      • PDX 10:45
        6h 10m
        1 stop
        HLN 17:55
        Portland - Helena | Fri, Dec 19 | Alaska Airlines
        NZD 831
        59% OFF
        NZD 2,005 NZD 831
      • PDX 18:27
        18h 18m
        1 stop
        HLN 13:45
        Portland - Helena | Fri, Dec 19 | United Airlines
        NZD 839
        57% OFF
        NZD 2,005 NZD 839
      • PDX 16:02
        28h 20m
        1 stop
        HLN 21:22
        Portland - Helena | Sun, Dec 14 | United Airlines
        NZD 1,121
        44% OFF
        NZD 2,005 NZD 1,121
      • PDX 15:59
        24h 56m
        1 stop
        HLN 17:55
        Portland - Helena | Fri, Dec 19 | Hawaiian Airlines
        NZD 1,464
        27% OFF
        NZD 2,005 NZD 1,464
      • PDX 13:00
        17h 25m
        1 stop
        HLN Invalid Date
        Portland - Helena | Sun, Dec 14 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Portland to Helena are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Portland to Helena

The distance between Portland and Helena is 825.61 km. Based on Trip.com's data, travel demand peaks in August. The off-season for travel is September.

Cheapest one-way flight priceNZD 703
Cheapest round-trip ticket priceNZD 446
Off-season for travelSeptember
Peak season for travelAugust
Flight distance825.61 km

Find the best time to fly from Portland to Helena

The cheapest time for Portland to Helena flights: Dec 7 to Dec 14 — one way flight prices from NZD 702.

Cheapest flights
From price
Search
  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Portland to Helena, calculated over the upcoming 10 weeks.

Flight FAQs

  • What are the cheapest flights from Portland to Helena (PDX-HLN)?

    Based on Trip.com data, Hawaiian Airlines offers one-way fares as low as NZD 703 on Cheapest nonstop routes (e.g. PDX to HLN on Sun, Dec 14), while Hawaiian Airlines offers Cheapest nonstop round-trips from NZD 446 departing on Mon, Jan 5 and returning on Fri, Jan 9.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Portland to Helena is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Portland to Helena, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sun, Dec 14, with one-way flights priced at just NZD 703.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Hawaiian Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Helena travel is around August.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Portland to Helena is September, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Portland to Helena on December 29, 2025 with Delta Air Lines, with prices starting at NZD 941.
  • The time difference between Helena and Portland is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.