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Flights from Portland to Great Falls

We've found these cheap flights for you. You can book one-way or return flight tickets.

      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
        GTF 15:00
        6h
        Direct
        PWM 16:00
        Great Falls - Portland | Mon, Dec 15 | Normal Airline
        Search
        Search
      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
        GTF 15:00
        6h
        Direct
        PWM 16:00
        Great Falls - Portland | Mon, Dec 15 | Normal Airline
        Search
        Search
      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
        GTF 15:00
        6h
        Direct
        PWM 16:00
        Great Falls - Portland | Mon, Dec 15 | Normal Airline
        Search
        Search
      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
        GTF 15:00
        6h
        Direct
        PWM 16:00
        Great Falls - Portland | Mon, Dec 15 | Normal Airline
        Search
        Search
      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
        GTF 15:00
        6h
        Direct
        PWM 16:00
        Great Falls - Portland | Mon, Dec 15 | Normal Airline
        Search
        Search
      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
        GTF 15:00
        6h
        Direct
        PWM 16:00
        Great Falls - Portland | Mon, Dec 15 | Normal Airline
        Search
        Search
      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
        GTF 15:00
        6h
        Direct
        PWM 16:00
        Great Falls - Portland | Mon, Dec 15 | Normal Airline
        Search
        Search
      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
        GTF 15:00
        6h
        Direct
        PWM 16:00
        Great Falls - Portland | Mon, Dec 15 | Normal Airline
        Search
        Search
      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
        GTF 15:00
        6h
        Direct
        PWM 16:00
        Great Falls - Portland | Mon, Dec 15 | Normal Airline
        Search
        Search
      • PWM 12:20
        12h 10m
        2 stops
        GTF 22:30
        Portland - Great Falls | Tue, Jan 20 | Delta Air Lines
        AU$445 AU$815
        45% OFF
        45% OFF
        AU$815 AU$445
      • PWM 09:40
        14h 13m
        2 stops
        GTF 21:53
        Portland - Great Falls | Tue, Jan 20 | United Airlines
        AU$464 AU$815
        43% OFF
        43% OFF
        AU$815 AU$464
      • PWM 06:15
        32h 16m
        2 stops
        GTF 12:31
        Portland - Great Falls | Fri, Dec 12 | Delta Air Lines
        AU$485 AU$815
        40% OFF
        40% OFF
        AU$815 AU$485
      • PWM 14:35
        23h 57m
        2 stops
        GTF 12:32
        Portland - Great Falls | Sat, Jan 24 | Delta Air Lines
        AU$506
        38% OFF
        AU$815 AU$506
      • PWM 08:40
        15h 3m
        2 stops
        GTF 21:43
        Portland - Great Falls | Sat, Jan 24 | United Airlines
        AU$539
        34% OFF
        AU$815 AU$539
      • PWM 06:03
        13h 25m
        2 stops
        GTF 17:28
        Portland - Great Falls | Tue, Dec 16 | Delta Air Lines
        AU$555
        32% OFF
        AU$815 AU$555
      • PWM 08:40
        15h 13m
        2 stops
        GTF 21:53
        Portland - Great Falls | Thu, Jan 15 | United Airlines
        AU$563
        31% OFF
        AU$815 AU$563
      • PWM 15:00
        32h 32m
        2 stops
        GTF 21:32
        Portland - Great Falls | Tue, Dec 16 | United Airlines
        AU$606
        26% OFF
        AU$815 AU$606
      • PWM 06:00
        18h 46m
        2 stops
        GTF 22:46
        Portland - Great Falls | Sat, Dec 27 | United Airlines
        AU$724
        11% OFF
        AU$815 AU$724
      • PWM 06:00
        18h 46m
        2 stops
        GTF 22:46
        Portland - Great Falls | Thu, Jan 1 | United Airlines
        AU$734
        10% OFF
        AU$815 AU$734
      • PWM 13:00
        17h 25m
        1 stop
        GTF Invalid Date
        Portland - Great Falls | Sat, Dec 13 | Normal Airline
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Displayed flight fares from Portland to Great Falls are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Portland to Great Falls

The distance between Portland and Great Falls is 3,186.57 km. Based on Trip.com's data, travel demand peaks in August. The off-season for travel is December.

Cheapest one-way flight priceAU$445
Off-season for travelDecember
Peak season for travelAugust
Flight distance3,186.57 km

Find the best time to fly from Portland to Great Falls

The cheapest time for Portland to Great Falls flights: Jan 18 to Jan 25 — one way flight prices from AU$444.

Cheapest flights
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  • 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 Great Falls, calculated over the upcoming 10 weeks.

Flight FAQs

  • When is the best time to book flights from Portland to Great Falls?

    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 Great Falls 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 Great Falls, 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 Tue, Jan 20, with one-way flights priced at just AU$445.
    · 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 Great Falls travel is around August.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Portland to Great Falls is December, when demand for travel is lower.
  • The time difference between Great Falls and Portland is 2h.
  • 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.