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$296+ Cheap flights from Portland, ME to Missoula (PWM - MSO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/24. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — MSO
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheap 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 October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$455
(American Airlines)

One-way from

$296
(United Airlines)

Popular in

March

Cheapest in

November

Average price

$769
Provider with most accurate pricing for Portland-Missoula Johnson-Bell Field flight deals.
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Provider most trusted by Cheapflights users for Portland-Missoula Johnson-Bell Field flights.
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From Portland to Missoula Johnson-Bell Field
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One-way flight from Portland to Missoula Johnson-Bell Field
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Highest demand for flights based on searches. 6% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 29, 2025.

This Delta deal was found by Cheapflights users on 10/29. 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.
Mon 12/84:53 pmPWM - MSO
2 stops9h 43mDelta
Sat 12/137:45 amMSO - PWM
2 stops11h 06mDelta
Deal found 10/29$510
This Delta deal was found by Cheapflights users on 10/27. 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.
Sat 11/112:45 pmPWM - MSO
2 stops10h 55mDelta
Tue 11/48:00 amMSO - PWM
2 stops13h 09mDelta
Deal found 10/27$519
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Sun 12/76:00 amPWM - MSO
2 stops15h 49mAmerican Airlines
Fri 12/127:00 amMSO - PWM
2 stops14h 37mAmerican Airlines
Deal found 10/29$591
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Mon 12/86:00 amPWM - MSO
2 stops12h 10mUnited Airlines
Mon 12/155:20 pmMSO - PWM
2 stops13h 50mUnited Airlines
Deal found 10/28$603
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Mon 12/86:00 amPWM - MSO
3 stops17h 18mUnited Airlines
Sat 12/132:46 pmMSO - PWM
2 stops16h 24mUnited Airlines
Deal found 10/29$606
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/13:20 pmPWM - MSO
1 stop8h 27mUnited Airlines
Tue 11/46:20 amMSO - PWM
1 stop7h 28mUnited Airlines
Deal found 10/27$609

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 October 29, 2025.
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

Sun 2/1

7:00 am-8:45 pm

2 stops15h 45m

Missoula Johnson-Bell Field

Sat 2/7

7:00 am-9:37 pm

2 stops12h 37m

$455

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Mon 12/8

4:53 pm-12:36 am

2 stops9h 43m

Missoula Johnson-Bell Field

Sat 12/13

7:45 am-8:51 pm

2 stops11h 06m

$510

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Sun 12/7

6:00 am-7:49 pm

2 stops15h 49m

Missoula Johnson-Bell Field

Fri 12/12

7:00 am-11:37 pm

2 stops14h 37m

$591

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Mon 12/8

6:00 am-4:10 pm

2 stops12h 10m

Missoula Johnson-Bell Field

Mon 12/15

5:20 pm-9:10 am

2 stops13h 50m

$603

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Mon 12/8

6:00 am-9:18 pm

3 stops17h 18m

Missoula Johnson-Bell Field

Sat 12/13

2:46 pm-9:10 am

2 stops16h 24m

$606

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Sun 12/7

9:45 am-9:18 pm

2 stops13h 33m

Missoula Johnson-Bell Field

Fri 12/12

6:15 am-9:17 pm

3 stops13h 02m

$872

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Mon 11/24

6:05 pm-9:35 pm

3 stops53h 30m

$305

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Wed 11/26

3:20 pm-9:47 pm

1 stop8h 27m

$341

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Tue 11/25

7:35 pm-3:13 pm

3 stops45h 38m

$341

PortlandMissoula

PWM - MSO

PWMMSO

Portland

Tue 11/25

6:00 am-4:01 pm

2 stops12h 01m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 14 results
1
2

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland, Maine-Missoula flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 $215). Flying from Portland, Maine to Missoula in April is currently the most expensive (average of $393). 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 October 29, 2025.
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
8,999 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,999 reviews
United Airlines
7.4
Good
8,999 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,032 reviews
United Airlines
7.4
Good
8,999 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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, Delta, and United Airlines can get you from Portland, Maine to Missoula in just under 9h 43m. Your travel time can differ by up to 6h 02m. 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 49% 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 $215). Flying from Portland, Maine to Missoula in April is currently the most expensive (average of $393). 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$308Average$576FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$429Average$634FlexibilityNo cancel feeOn-time71%

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