How do I get Price Alerts for flights from Portland, Maine to Great Falls?

Search flight deals from Portland, Maine to Great Falls . While viewing offers you’ll have the option to create a Price Alert.

How can I save money on flights from Portland, Maine to Great Falls with momondo?

Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

How does momondo find its flight prices?

We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

When did momondo last update prices for flights from Portland Airport to Great Falls Airport?

Prices for flights from Portland Airport to Great Falls Airport refresh daily.

How old do you have to be to fly from Portland Airport to Great Falls Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Great Falls Airport.

What documentation or ID do you need to fly to Great Falls Airport?

The required travel and health documents for your Great Falls 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 Great Falls Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$705 Cheap Flights from Portland, Maine to Great Falls in 2026

1 adult

0 bags

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Find the cheapest flights from Portland, Maine to Great Falls

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:15 pm - 1:32 pm

PWM

GTF

19h 17m

2 stops

2:31 pm - 10:02 am

GTF

PWM

17h 31m

2 stops

$705United Airlines

Tue, Sep 8 - Tue, Sep 15

8:15 pm - 1:32 pm

PWM

GTF

19h 17m

2 stops

6:15 am - 3:43 pm

GTF

PWM

7h 28m

1 stop

$721United Airlines

Tue, Sep 8 - Tue, Sep 15

5:06 pm - 10:30 pm

PWM

GTF

31h 24m

2 stops

2:25 pm - 9:19 am

GTF

PWM

16h 54m

2 stops

$760United Airlines

Tue, Oct 27 - Sat, Oct 31

11:17 am - 10:30 pm

PWM

GTF

13h 13m

2 stops

2:25 pm - 11:57 pm

GTF

PWM

31h 32m

2 stops

$797United Airlines

Tue, Oct 27 - Sat, Oct 31

5:06 pm - 10:30 pm

PWM

GTF

31h 24m

2 stops

2:25 pm - 4:49 pm

GTF

PWM

24h 24m

1 stop

$821United Airlines

Tue, Oct 27 - Sat, Oct 31

11:17 am - 10:30 pm

PWM

GTF

13h 13m

2 stops

2:25 pm - 4:49 pm

GTF

PWM

24h 24m

1 stop

$858United Airlines

Tue, Oct 27 - Sat, Oct 31

3:31 pm - 9:28 pm

PWM

GTF

7h 57m

1 stop

6:15 am - 3:43 pm

GTF

PWM

7h 28m

1 stop

$862United Airlines

Tue, Sep 8 - Tue, Sep 15

3:35 pm - 10:30 pm

PWM

GTF

8h 55m

1 stop

6:15 am - 3:49 pm

GTF

PWM

7h 34m

1 stop

$1,264United Airlines

Tue, Oct 27 - Sat, Oct 31

United Airlines flights from Portland, Maine to Great Falls

Our best United Airlines deals on Portland, Maine to Great Falls flight tickets

United Airlines

Sep 8

PWM8:15 pmPortland

19h 17m

2 stops

GTF1:32 pmGreat Falls

Sep 15

GTF2:31 pmGreat Falls

17h 31m

2 stops

PWM10:02 amPortland

$705

United Airlines

Sep 8

PWM8:15 pmPortland

19h 17m

2 stops

GTF1:32 pmGreat Falls

Sep 15

GTF6:15 amGreat Falls

7h 28m

1 stop

PWM3:43 pmPortland

$721

United Airlines

Oct 27

PWM5:06 pmPortland

31h 24m

2 stops

GTF10:30 pmGreat Falls

Oct 31

GTF2:25 pmGreat Falls

16h 54m

2 stops

PWM9:19 amPortland

$760

momondo Fare Finder

Use the filters below to find and compare flights from Portland, Maine to Great Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

Tue 9/8

8:15 pm-1:32 pm

2 stops19h 17m

Great Falls

Tue 9/15

2:31 pm-10:02 am

2 stops17h 31m

$705

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

Tue 9/8

8:15 pm-1:32 pm

2 stops19h 17m

Great Falls

Tue 9/15

6:15 am-3:43 pm

1 stop7h 28m

$721

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

Tue 10/27

5:06 pm-10:30 pm

2 stops31h 24m

Great Falls

Sat 10/31

2:25 pm-9:19 am

2 stops16h 54m

$760

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

Tue 10/27

11:17 am-10:30 pm

2 stops13h 13m

Great Falls

Sat 10/31

2:25 pm-11:57 pm

2 stops31h 32m

$797

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

Tue 10/27

5:06 pm-10:30 pm

2 stops31h 24m

Great Falls

Sat 10/31

2:25 pm-4:49 pm

1 stop24h 24m

$821

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

Tue 10/27

11:17 am-10:30 pm

2 stops13h 13m

Great Falls

Sat 10/31

2:25 pm-4:49 pm

1 stop24h 24m

$858

Quickest round-trip

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

Tue 9/8

3:31 pm-9:28 pm

1 stop7h 57m

Great Falls

Tue 9/15

6:15 am-3:43 pm

1 stop7h 28m

$862

PortlandGreat Falls

PWM - GTF

PWMGTF

Portland

Tue 10/27

3:35 pm-10:30 pm

1 stop8h 55m

Great Falls

Sat 10/31

6:15 am-3:49 pm

1 stop7h 34m

$1,264

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Portland, Maine to Great Falls

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to Great Falls according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Portland, Maine to Great Falls (PWM to GTF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to Great Falls

Fastest flight time	19h 17m
Direct flights	None

The fastest flight from Portland, Maine to Great Falls takes 19h 17m

There are no direct flights from Portland, Maine to Great Falls. There are no popular flight routes from Portland, Maine to Great Falls.

Search flight deals

Frequently asked questions about flying from Portland, Maine to Great Falls

How far is Portland to Great Falls by plane?
The straight-line distance from Portland to Great Falls is 1977.7 mi. In terms of flight time, this usually takes a little over 19h 17m.
When did momondo last update prices for flights from Portland Airport to Great Falls Airport?
Prices for flights from Portland Airport to Great Falls Airport refresh daily.
How old do you have to be to fly from Portland Airport to Great Falls Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Great Falls Airport.
What documentation or ID do you need to fly to Great Falls Airport?
The required travel and health documents for your Great Falls 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 Great Falls Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Frequently asked questions about flying from Portland, Maine to Great Falls

How do I get Price Alerts for flights from Portland, Maine to Great Falls?
Search flight deals from Portland, Maine to Great Falls. While viewing offers you’ll have the option to create a Price Alert.
How can I save money on flights from Portland, Maine to Great Falls with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

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Why use momondo?

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

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

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

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

How can momondo help me find flights from Portland to Great Falls?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Portland to Great Falls.

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

If you are not ready to book a flight from Portland to Great Falls now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Great Falls and let you know when they change.