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Cheap flights from Portland, Maine to Montana from $159

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Montana departing on 9/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portland, Maine to Montana

Cheap round-trip flights

United Airlines Logo
6:14 am - 11:16 amPWM-BIL
7h 02m1 stop
United Airlines Logo
12:00 pm - 9:59 pmBIL-PWM
7h 59m1 stop
$289United Airlines
Find Deal
Fri, Sep 19 - Tue, Sep 23
United Airlines Logo
3:35 pm - 10:46 pmPWM-BIL
9h 11m1 stop
United Airlines Logo
5:00 am - 6:26 pmBIL-PWM
11h 26m2 stops
$294United Airlines
Find Deal
Fri, Sep 19 - Tue, Sep 23
United Airlines Logo
3:35 pm - 10:46 pmPWM-BIL
9h 11m1 stop
United Airlines Logo
12:00 pm - 9:59 pmBIL-PWM
7h 59m1 stop
$301United Airlines
Find Deal
Fri, Sep 19 - Wed, Sep 24
Delta Logo
12:00 pm - 9:40 pmPWM-MSO
11h 40m2 stops
Delta Logo
8:00 am - 11:09 pmMSO-PWM
13h 09m2 stops
$319Delta
Find Deal
Sat, Nov 1 - Tue, Nov 4
American Airlines Logo
6:15 am - 2:14 pmPWM-BZN
9h 59m1 stop
American Airlines Logo
1:39 pm - 11:59 pmBZN-PWM
8h 20m1 stop
$326American Airlines
Find Deal
Wed, Sep 24 - Mon, Sep 29
American Airlines Logo
7:05 am - 7:17 pmPWM-BZN
14h 12m2 stops
American Airlines Logo
1:39 pm - 11:59 pmBZN-PWM
8h 20m1 stop
$331American Airlines
Find Deal
Wed, Sep 24 - Mon, Sep 29
American Airlines Logo
6:14 am - 1:08 pmPWM-BZN
8h 54m1 stop
American Airlines Logo
12:58 pm - 10:45 pmBZN-PWM
7h 47m1 stop
$343American Airlines
Find Deal
Wed, Oct 22 - Sun, Oct 26
Southwest Logo
10:45 am - 9:25 pmPWM-BZN
12h 40m2 stops
Southwest Logo
5:30 am - 7:55 pmBZN-PWM
12h 25m2 stops
$347Southwest
Find Deal
Sat, Oct 25 - Wed, Oct 29
Southwest Logo
1:30 pm - 12:10 amPWM-BZN
12h 40m2 stops
Southwest Logo
5:30 am - 7:55 pmBZN-PWM
12h 25m2 stops
$359Southwest
Find Deal
Fri, Oct 24 - Wed, Oct 29
Delta Logo
6:00 am - 1:19 pmPWM-BZN
9h 19m1 stop
Delta Logo
6:10 am - 10:19 pmBZN-PWM
14h 09m2 stops
$376Delta
Find Deal
Sat, Oct 25 - Wed, Oct 29

United Airlines flights from Portland, Maine to Montana

Our best United Airlines deals on Portland, Maine to Montana flight tickets
United Airlines
Sep 19
PWM6:14 amPortland
7h 02m
1 stop
BIL11:16 amBillings Logan Intl
Sep 23
BIL12:00 pmBillings Logan Intl
7h 59m
1 stop
PWM9:59 pmPortland
$289
Find similar
United Airlines
Sep 19
PWM3:35 pmPortland
9h 11m
1 stop
BIL10:46 pmBillings Logan Intl
Sep 23
BIL5:00 amBillings Logan Intl
11h 26m
2 stops
PWM6:26 pmPortland
$294
Find similar
United Airlines
Sep 19
PWM3:35 pmPortland
9h 11m
1 stop
BIL10:46 pmBillings Logan Intl
Sep 24
BIL12:00 pmBillings Logan Intl
7h 59m
1 stop
PWM9:59 pmPortland
$301
Find similar

American Airlines flights from Portland, Maine to Montana

Our best American Airlines deals on Portland, Maine to Montana flight tickets
American Airlines
Sep 24
PWM6:15 amPortland
9h 59m
1 stop
BZN2:14 pmBozeman Gallatin Field
Sep 29
BZN1:39 pmBozeman Gallatin Field
8h 20m
1 stop
PWM11:59 pmPortland
$326
Find similar
American Airlines
Sep 24
PWM7:05 amPortland
14h 12m
2 stops
BZN7:17 pmBozeman Gallatin Field
Sep 29
BZN1:39 pmBozeman Gallatin Field
8h 20m
1 stop
PWM11:59 pmPortland
$331
Find similar
American Airlines
Oct 22
PWM6:14 amPortland
8h 54m
1 stop
BZN1:08 pmBozeman Gallatin Field
Oct 26
BZN12:58 pmBozeman Gallatin Field
7h 47m
1 stop
PWM10:45 pmPortland
$343
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine to Montana 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, momondo users made 832,500 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from Portland, Maine to Montana that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandBillings

PWM - BIL

PWMBIL

Portland

Fri 9/19

6:14 am-11:16 am

1 stop7h 02m

Billings Logan Intl

Tue 9/23

12:00 pm-9:59 pm

1 stop7h 59m

$289

PortlandBillings

PWM - BIL

PWMBIL

Portland

Fri 9/19

3:35 pm-10:46 pm

1 stop9h 11m

Billings Logan Intl

Tue 9/23

5:00 am-6:26 pm

2 stops11h 26m

$294

PortlandBillings

PWM - BIL

PWMBIL

Portland

Fri 9/19

3:35 pm-10:46 pm

1 stop9h 11m

Billings Logan Intl

Wed 9/24

12:00 pm-9:59 pm

1 stop7h 59m

$301

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Sat 11/1

12:00 pm-9:40 pm

2 stops11h 40m

Missoula Johnson-Bell Field

Tue 11/4

8:00 am-11:09 pm

2 stops13h 09m

$319

PortlandBozeman

PWM - BZN

PWMBZN

Portland

Wed 9/24

6:15 am-2:14 pm

1 stop9h 59m

Bozeman Gallatin Field

Mon 9/29

1:39 pm-11:59 pm

1 stop8h 20m

$326

PortlandBozeman

PWM - BZN

PWMBZN

Portland

Wed 9/24

7:05 am-7:17 pm

2 stops14h 12m

Bozeman Gallatin Field

Mon 9/29

1:39 pm-11:59 pm

1 stop8h 20m

$331

PortlandBozeman

PWM - BZN

PWMBZN

Portland

Wed 10/22

6:14 am-1:08 pm

1 stop8h 54m

Bozeman Gallatin Field

Sun 10/26

12:58 pm-10:45 pm

1 stop7h 47m

$343

PortlandBozeman

PWM - BZN

PWMBZN

Portland

Sat 10/25

10:45 am-9:25 pm

2 stops12h 40m

Bozeman Gallatin Field

Wed 10/29

5:30 am-7:55 pm

2 stops12h 25m

$347

PortlandBozeman

PWM - BZN

PWMBZN

Portland

Fri 10/24

1:30 pm-12:10 am

2 stops12h 40m

Bozeman Gallatin Field

Wed 10/29

5:30 am-7:55 pm

2 stops12h 25m

$359

PortlandBozeman

PWM - BZN

PWMBZN

Portland

Sat 10/25

6:00 am-1:19 pm

1 stop9h 19m

Bozeman Gallatin Field

Wed 10/29

6:10 am-10:19 pm

2 stops14h 09m

$376

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Montana from

How to get the cheapest flight ticket from Portland, Maine to Montana

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Montana?

The cheapest month to fly to Montana from Portland, Maine is in September. Flight prices, which tend to average around $478, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Montana, with average flight prices from Portland, Maine averaging around $482.

What is the cheapest day to depart on your flight to Montana?

Our data shows that Tuesday is the least expensive day to fly to Montana. Tickets to fly out on this day can be as low as $613. The most expensive day to fly to Montana is Sunday, with ticket prices averaging around $752.

What is the cheapest time of day to depart on your flight to Montana?

The cheapest time of day to fly to Montana is in the morning when flights can be purchased for as low as $635. In the afternoon is when there is more demand to fly to Montana, so prices are often more expensive at around $765 per ticket.

How far in advance should I book a flight to Montana?

You are more likely to see cheaper flights to Montana from Portland, Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to Montana for around $592 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montana from Portland, Maine for as low as $458 on momondo.

Can stopping save me money on Portland, Maine to Montana flights?

You could potentially save up to 25% on your flight if you consider stops on a Portland, Maine to Montana flight.

Cheap Portland, Maine to Montana flight deals and tips

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

Direct flights

None
There are no direct flights from Portland, Maine to Montana. There are no popular flight routes from Portland, Maine to Montana.
Search flight deals

  • When did momondo last update prices for flights from Portland Airport to Montana?

    Prices for flights from Portland Airport to Montana are updated daily.

  • How many operators does momondo search for flights from Portland Airport to Montana?

  • How old do you have to be to fly from Portland Airport to Montana?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Montana.

  • What documentation or ID do you need to fly to Montana?

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

Best airlines flying from Portland, Maine to Montana

Compare and see reviews for airlines that fly from Portland, Maine to Montana with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $263Free CancellationRating
7.9
7,982 reviews
Search Delta flights
American AirlinesPriceFrom $311Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $340Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
SouthwestPriceFrom $416Free CancellationRating
8.0
4,246 reviews
Search Southwest flights

Why use momondo?

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

It is quick and easy to find Portland to Montana flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Montana that suits you.

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

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

How can momondo help me find flights from Portland to Montana?

Once all potential Portland to Montana flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Montana, momondo offers a useful price alert feature which will track prices for flights to Montana from Portland and alert you when they change.

An easier way to manage your Montana trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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