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$439+ Cheap flights from Portland, ME to Great Falls (PWM - GTF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — GTF
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from Portland to Great Falls

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Great Falls (GTF). 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 septiembre 11, 2025.

Round-trip from

$439
(United Airlines)

Popular in

March

Cheapest in

January

Average price

$724
From Portland to Great Falls
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Highest demand for flights based on searches. 17% potential increase in price ($118 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Portland to Great Falls

Cheapest flights from Portland to Great Falls
Explore the most affordable flight options available from Portland to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/263:39 pmPWM - GTF
1 stop7h 32mUnited Airlines
mar. 9/307:00 amGTF - PWM
2 stops14h 13mUnited Airlines
Deal found 9/11$439
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/410:30 amPWM - GTF
2 stops12h 41mUnited Airlines
mar. 10/72:31 pmGTF - PWM
2 stops29h 13mUnited Airlines
Deal found 9/9$475
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/2310:19 amPWM - GTF
2 stops14h 27mUnited Airlines
mar. 12/306:15 amGTF - PWM
2 stops10h 10mUnited Airlines
Deal found 9/10$1,724

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Great Falls 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 septiembre 11, 2025.
Use the filters below to find and compare flights from Portland to Great Falls that are best for you.

Fly from

Portland

Fly to

Great Falls

Route

Depart

Return

Price

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

vie. 9/26

3:39 pm-9:11 pm

1 stop7h 32m

Great Falls

mar. 9/30

7:00 am-11:13 pm

2 stops14h 13m

$439

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

sáb. 10/4

10:30 am-9:11 pm

2 stops12h 41m

Great Falls

mar. 10/7

2:31 pm-9:44 pm

2 stops29h 13m

$475

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

mar. 12/23

10:19 am-10:46 pm

2 stops14h 27m

Great Falls

mar. 12/30

6:15 am-6:25 pm

2 stops10h 10m

$1,724

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Best time to book a flight from Portland to Great Falls

Have a flexible travel schedule? Discover the best time to fly to Great Falls 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 Great Falls

What is the cheapest month to book a flight from Portland, Maine to Great Falls?

Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Great Falls (average of $367). Flying from Portland, Maine to Great Falls in July is currently the most expensive (average of $574). 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.

Reviews of airlines servicing Great Falls

Get insights into the airlines that provide service to Great Falls. 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 Great Falls. Reviews last updated septiembre 11, 2025.
Read through reviews of airlines operating flights from Portland to Great Falls, such as Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Portland to Great Falls. 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, Maine to Great Falls?

    Airlines like United Airlines fly from Portland, Maine to Great Falls in about 7h 32m. The time it takes to get you to your destination can typically vary by up to . The distance between Portland, Maine and Great Falls is about 1979 mi.

  • What are the cheapest airlines flying from Portland, Maine to Great Falls round-trip?

    According to our current data, United Airlines ($340), and Delta ($347) offers the cheapest pricing from Portland, Maine to Great Falls. United Airlines is priced at 41% lower than the current average price of a flight leaving 3 months from now.

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

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

  • How can I find direct flights from Portland to Great Falls?

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

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

    Yes. Cheapflights offers flight deals from Portland to Great Falls 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, Maine to Great Falls?

    Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Great Falls (average of $367). Flying from Portland, Maine to Great Falls in July is currently the most expensive (average of $574). 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

Traveling to a place near Great Falls?

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Top 2 airlines flying from Portland to Great Falls

Discover the top 2 airlines that operate flights from Portland to Great Falls. 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$340Average$608FlexibilityNo cancel feeOn-time69%
DeltaCheapest$347Average$658FlexibilityNo cancel feeOn-timeN/A

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