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Flights from Portland to Helena

Find flight deals from Portland to Helena for the next 3 months. Book one way flights from US$409 or round trip flights from US$259.

      • PDX 10:45 AM
        6h 10m
        1 stop
        HLN 5:55 PM
        Portland - Helena | Mon, Jan 5 | Hawaiian Airlines
        HLN 5:59 PM
        5h 47m
        1 stop
        PDX 10:46 PM
        Helena - Portland | Fri, Jan 9 | Hawaiian Airlines
        US$259 US$1,101
        76% OFF
        76% OFF
        US$1,101 US$259
      • PDX 5:50 AM
        5h 37m
        1 stop
        HLN 12:27 PM
        Portland - Helena | Mon, Jan 5 | Delta Air Lines
        HLN 5:30 AM
        4h 33m
        1 stop
        PDX 9:03 AM
        Helena - Portland | Tue, Jan 13 | Delta Air Lines
        US$310 US$1,101
        72% OFF
        72% OFF
        US$1,101 US$310
      • PDX 10:45 AM
        6h 10m
        1 stop
        HLN 5:55 PM
        Portland - Helena | Mon, Jan 5 | Alaska Airlines
        HLN 5:59 PM
        5h 47m
        1 stop
        PDX 10:46 PM
        Helena - Portland | Fri, Jan 9 | Hawaiian Airlines
        US$340 US$1,101
        69% OFF
        69% OFF
        US$1,101 US$340
      • PDX 5:30 AM
        6h
        1 stop
        HLN 12:30 PM
        Portland - Helena | Sun, Jan 4 | Delta Air Lines
        HLN 5:30 AM
        4h 33m
        1 stop
        PDX 9:03 AM
        Helena - Portland | Sat, Jan 10 | Delta Air Lines
        US$374
        66% OFF
        US$1,101 US$374
      • PDX 5:00 PM
        4h 29m
        1 stop
        HLN 10:29 PM
        Portland - Helena | Sat, Jan 17 | Delta Air Lines
        HLN 5:30 AM
        4h 39m
        1 stop
        PDX 9:09 AM
        Helena - Portland | Sun, Jan 25 | Delta Air Lines
        US$417
        62% OFF
        US$1,101 US$417
      • PDX 5:30 AM
        6h
        1 stop
        HLN 12:30 PM
        Portland - Helena | Mon, Dec 29 | Delta Air Lines
        HLN 1:11 PM
        10h 47m
        1 stop
        PDX 10:58 PM
        Helena - Portland | Sat, Jan 3 | Delta Air Lines
        US$548
        50% OFF
        US$1,101 US$548
      • PDX 5:00 AM
        15h 26m
        1 stop
        HLN 9:26 PM
        Portland - Helena | Thu, Jan 15 | United Airlines
        HLN 6:15 AM
        28h 30m
        1 stop
        PDX 9:45 AM
        Helena - Portland | Fri, Jan 16 | United Airlines
        US$632
        43% OFF
        US$1,101 US$632
      • PDX 5:30 AM
        6h
        1 stop
        HLN 12:30 PM
        Portland - Helena | Mon, Dec 22 | Delta Air Lines
        HLN 5:30 AM
        4h 38m
        1 stop
        PDX 9:08 AM
        Helena - Portland | Fri, Dec 26 | Delta Air Lines
        US$726
        34% OFF
        US$1,101 US$726
      • PDX 5:06 PM
        4h 24m
        1 stop
        HLN 10:30 PM
        Portland - Helena | Sat, Dec 20 | Delta Air Lines
        HLN 1:11 PM
        6h 3m
        1 stop
        PDX 6:14 PM
        Helena - Portland | Fri, Dec 26 | Delta Air Lines
        US$789
        28% OFF
        US$1,101 US$789
      • PDX 5:00 AM
        15h 31m
        1 stop
        HLN 9:31 PM
        Portland - Helena | Fri, Dec 26 | United Airlines
        HLN 2:26 PM
        24h 9m
        1 stop
        PDX 1:35 PM
        Helena - Portland | Tue, Dec 30 | United Airlines
        US$804
        27% OFF
        US$1,101 US$804
      • PDX 1:00 PM
        17h 25m
        1 stop
        HLN Invalid Date
        Portland - Helena | Sun, Dec 14 | Normal Airline
        HLN 3:00 PM
        6h
        Nonstop
        PDX 4:00 PM
        Helena - Portland | Tue, Dec 16 | Normal Airline
        Find More Flights
        Find More Flights
      • PDX 10:40 AM
        6h 11m
        1 stop
        HLN 5:51 PM
        Portland - Helena | Sun, Dec 14 | Hawaiian Airlines
        US$409 US$1,166
        65% OFF
        65% OFF
        US$1,166 US$409
      • PDX 5:30 AM
        5h 55m
        1 stop
        HLN 12:25 PM
        Portland - Helena | Fri, Dec 19 | Delta Air Lines
        US$409 US$1,166
        65% OFF
        65% OFF
        US$1,166 US$409
      • PDX 10:40 AM
        6h 11m
        1 stop
        HLN 5:51 PM
        Portland - Helena | Sun, Dec 14 | Alaska Airlines
        US$410 US$1,166
        65% OFF
        65% OFF
        US$1,166 US$410
      • PDX 5:30 AM
        5h 55m
        1 stop
        HLN 12:25 PM
        Portland - Helena | Sun, Dec 14 | Delta Air Lines
        US$411
        65% OFF
        US$1,166 US$411
      • PDX 10:45 AM
        6h 10m
        1 stop
        HLN 5:55 PM
        Portland - Helena | Fri, Dec 19 | Alaska Airlines
        US$483
        59% OFF
        US$1,166 US$483
      • PDX 6:27 PM
        18h 18m
        1 stop
        HLN 1:45 PM
        Portland - Helena | Fri, Dec 19 | United Airlines
        US$488
        57% OFF
        US$1,166 US$488
      • PDX 4:02 PM
        28h 20m
        1 stop
        HLN 9:22 PM
        Portland - Helena | Sun, Dec 14 | United Airlines
        US$652
        44% OFF
        US$1,166 US$652
      • PDX 3:59 PM
        24h 56m
        1 stop
        HLN 5:55 PM
        Portland - Helena | Fri, Dec 19 | Hawaiian Airlines
        US$851
        27% OFF
        US$1,166 US$851
      • PDX 1:00 PM
        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.

Flying from Portland to Helena

The distance between Portland and Helena is approximately 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 priceUS$409
Cheapest round-trip ticket priceUS$259
Off-season for travelSeptember
Peak season for travelAugust
Flight distance825.61 km

When is the cheapest 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 US$408.

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.

Frequently Asked Questions

  • 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 US$409 on Cheapest nonstop routes (e.g. PDX to HLN on Sun, Dec 14), while Hawaiian Airlines offers Cheapest nonstop round-trips from US$259 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 US$409.
    · 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 US$547.
  • 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.

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