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$329+ Cheap flights from Portland, ME to Missoula (PWM - MSO)

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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — MSO
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Portland to Missoula

Cheapest flights from Portland to Missoula
Explore the most affordable flight options available from Portland to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This American Airlines deal was found by Cheapflights users on 1/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:07 am
PWM
-
MSO
1 stop7h 31m
American Airlines
Tue 5/51:10 pm
MSO
-
PWM
1 stop8h 00m
American Airlines
Deal found 1/28$329
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Tue 10/275:30 am
PWM
-
MSO
2 stops12h 40m
United Airlines
Sat 10/316:15 am
MSO
-
PWM
1 stop7h 34m
United Airlines
Deal found 1/28$434
This American Airlines deal was found by Cheapflights users on 1/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:17 am
PWM
-
MSO
1 stop8h 33m
American Airlines
Sun 3/221:21 pm
MSO
-
PWM
1 stop8h 13m
American Airlines
Deal found 1/28$438
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:07 am
PWM
-
MSO
1 stop7h 31m
American Airlines
Tue 5/191:10 pm
MSO
-
PWM
1 stop8h 00m
American Airlines
Deal found 1/27$449
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Sat 5/211:34 am
PWM
-
MSO
2 stops11h 56m
United Airlines
Tue 5/56:15 am
MSO
-
PWM
2 stops10h 49m
United Airlines
Deal found 1/28$470
This Delta deal was found by Cheapflights users on 1/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1112:10 pm
PWM
-
MSO
2 stops14h 18m
Delta
Sun 2/157:30 am
MSO
-
PWM
2 stops13h 50m
Delta
Deal found 1/27$481
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/181:31 pm
PWM
-
MSO
2 stops11h 03m
American Airlines
Tue 8/41:05 pm
MSO
-
PWM
1 stop7h 36m
American Airlines
Deal found 1/27$563

Find flight deals from Portland to Missoula

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Missoula (MSO). 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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$329
(American Airlines)

Popular in

March

Cheapest in

November
Provider with most accurate pricing for Portland-Missoula Johnson-Bell Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Missoula Johnson-Bell Field flights.
Search Deals
From Portland to Missoula Johnson-Bell Field
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($36 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Missoula 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 January 29, 2026.
Use the filters below to find and compare flights from Portland to Missoula that are best for you.

Fly from

Portland

Fly to

Missoula

Route

Depart

Return

Price

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Wed 3/11

6:17 am-12:50 pm

1 stop8h 33m

Missoula Johnson-Bell Field

Sun 3/22

1:21 pm-11:34 pm

1 stop8h 13m

$438

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Sat 5/16

7:07 am-12:38 pm

1 stop7h 31m

Missoula Johnson-Bell Field

Tue 5/19

1:10 pm-11:10 pm

1 stop8h 00m

$449

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Sat 5/2

11:34 am-9:30 pm

2 stops11h 56m

Missoula Johnson-Bell Field

Tue 5/5

6:15 am-7:04 pm

2 stops10h 49m

$470

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Wed 2/11

12:10 pm-12:28 am

2 stops14h 18m

Missoula Johnson-Bell Field

Sun 2/15

7:30 am-11:20 pm

2 stops13h 50m

$481

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Sat 7/18

1:31 pm-10:34 pm

2 stops11h 03m

Missoula Johnson-Bell Field

Tue 8/4

1:05 pm-10:41 pm

1 stop7h 36m

$563

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Mon 7/20

6:00 am-11:34 am

1 stop7h 34m

Missoula Johnson-Bell Field

Tue 8/4

7:15 am-9:27 pm

2 stops12h 12m

$585

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Compare providers for flights from Portland to Missoula

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Missoula in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-Missoula flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Missoula flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-Missoula flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-Missoula flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-Missoula flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Missoula

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

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

Currently, July is the cheapest month in which you can book a flight from Portland, Maine to Missoula (average of $238). Flying from Portland, Maine to Missoula in December is currently the most expensive (average of $440). 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 Missoula

Get insights into the airlines that provide service to Missoula. 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 Missoula. Reviews last updated January 29, 2026.
Peruse reviews from past customers who have flown with United Airlines and American Airlines from Portland to Missoula to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,215 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,215 reviews
United Airlines
7.4
Good
9,215 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,205 reviews
United Airlines
7.4
Good
9,215 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Portland to Missoula. 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 Missoula?

    American Airlines, United Airlines, and Delta can get you from Portland, Maine to Missoula in just under 8h 33m. Your travel time can differ by up to 5h 45m. Airlines will cover a distance of 2111 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Cheapflights users have booked flights from Portland, Maine to Missoula round-trip from $308. Another airline that can offer you cheap pricing is American Airlines. These flights start at 45% lower than the current average price 3 months from now.

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

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

  • How can I find direct flights from Portland to Missoula?

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

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

    Yes. Cheapflights offers flight deals from Portland to Missoula 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 Missoula?

    Currently, July is the cheapest month in which you can book a flight from Portland, Maine to Missoula (average of $238). Flying from Portland, Maine to Missoula in December is currently the most expensive (average of $440). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Portland to Missoula

Discover the top 2 airlines that operate flights from Portland to Missoula. 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$308Average$557FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$429Average$588FlexibilityNo cancel feeOn-time71%

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