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$241+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — MSO
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
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 septiembre 11, 2025.

Round-trip from

$319
(Delta)

One-way from

$241
(United Airlines)

Popular in

March

Cheapest in

August

Average price

$678
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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High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($25 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 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 septiembre 11, 2025.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/112:00 pmPWM - MSO
2 stops11h 40mDelta
mar. 11/48:00 amMSO - PWM
2 stops12h 19mDelta
Deal found 9/11$319
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/263:28 pmPWM - MSO
1 stop9h 50mAmerican Airlines
sáb. 10/412:50 pmMSO - PWM
1 stop7h 53mAmerican Airlines
Deal found 9/10$339
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.
sáb. 9/276:14 amPWM - MSO
1 stop7h 36mUnited Airlines
mié. 10/110:38 amMSO - PWM
2 stops10h 35mUnited Airlines
Deal found 9/11$374
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.
sáb. 11/13:20 pmPWM - MSO
1 stop8h 27mUnited Airlines
mar. 11/46:20 amMSO - PWM
1 stop7h 28mUnited Airlines
Deal found 9/10$409

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 septiembre 11, 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

sáb. 11/1

12:00 pm-9:40 pm

2 stops11h 40m

Missoula Johnson-Bell Field

mar. 11/4

8:00 am-10:19 pm

2 stops12h 19m

$319

PortlandMissoula

PWM - MSO

PWMMSO

Portland

vie. 9/26

3:28 pm-11:18 pm

1 stop9h 50m

Missoula Johnson-Bell Field

sáb. 10/4

12:50 pm-10:43 pm

1 stop7h 53m

$339

PortlandMissoula

PWM - MSO

PWMMSO

Portland

sáb. 9/27

6:14 am-11:50 am

1 stop7h 36m

Missoula Johnson-Bell Field

mié. 10/1

10:38 am-11:13 pm

2 stops10h 35m

$374

PortlandMissoula

PWM - MSO

PWMMSO

Portland

sáb. 11/1

3:20 pm-9:47 pm

1 stop8h 27m

Missoula Johnson-Bell Field

mar. 11/4

6:20 am-3:48 pm

1 stop7h 28m

$409

PortlandMissoula

PWM - MSO

PWMMSO

Portland

mar. 10/21

6:14 am-11:50 am

1 stop7h 36m

$241

PortlandMissoula

PWM - MSO

PWMMSO

Portland

mié. 10/22

2:38 pm-12:27 pm

2 stops23h 49m

$252

PortlandMissoula

PWM - MSO

PWMMSO

Portland

vie. 10/24

2:38 pm-12:27 pm

2 stops23h 49m

$252

PortlandMissoula

PWM - MSO

PWMMSO

Portland

sáb. 11/1

12:00 pm-9:40 pm

2 stops11h 40m

$254

PortlandMissoula

PWM - MSO

PWMMSO

Portland

jue. 10/23

5:00 pm-9:40 pm

2 stops30h 40m

$284

PortlandMissoula

PWM - MSO

PWMMSO

Portland

sáb. 11/1

3:20 pm-9:47 pm

1 stop8h 27m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 15 results
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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, October is the cheapest month in which you can book a flight from Portland, Maine to Missoula (average of $365). Flying from Portland, Maine to Missoula in March is currently the most expensive (average of $505). 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 septiembre 11, 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
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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?

    Delta and American Airlines can get you from Portland, Maine to Missoula in just under 9h 50m. Your travel time can differ by up to 1h 50m. 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 $429. Another airline that can offer you cheap pricing is United Airlines. These flights start at 36% 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, October is the cheapest month in which you can book a flight from Portland, Maine to Missoula (average of $365). Flying from Portland, Maine to Missoula in March is currently the most expensive (average of $505). 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$429Average$634FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$438Average$662FlexibilityNo cancel feeOn-time69%

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