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 $319. Other airlines that can offer you cheap pricing are American Airlines, from $434, and United Airlines, from $490. These flights start at 50% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Portland, Maine to Missoula one-way?

$280 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $281 and $541, respectively.

What is the cheapest day to fly from Portland, Maine to Missoula?

Travelers seeking maximum savings on their Portland, Maine to Missoula flight should consider departing on Saturday mornings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Missoula ranges from 0.7 - 2.1 inches per month. June is typically the wettest month, when rainfall can reach 2.1 in. February is typically the driest time to visit Missoula when rainfall is around 0.7 in.

If weather is an important factor for your trip to Missoula, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 24.8 F).

What is the cheapest day to fly round-trip from Portland, Maine to Missoula?

Departing on a Friday is a good option for securing a great price. You can expect to save up to 50% when planning your travel around this day of the week.

What is the cheapest month to fly from Portland, Maine to Missoula?

April is one of the best times of the year to fly to Missoula from Portland, Maine. Prices for April average $648 per person but you can even find prices for as low as $520. The most expensive prices can be found in the month of March. Opting for a April flight can save you 37% on your journey compared to booking in March

What is the cheapest time of day to fly from PWM to MSO?

One of the essential ways to save on airfare from Portland, Maine to Missoula is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 6% on airfare.

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.

$280+ Flights from Portland, ME to Missoula

Q: How much does it cost to fly round-trip from Portland, Maine to Missoula?

Airfare is below average for this route at the moment. Portland, Maine to Missoula flights typically cost between $442 and $709 in November. The cheapest round-trip price found within the last 3 days was $319 on Delta (Nov 1-Nov 4).

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Cheap flight deals from Portland to Missoula

Round-trip from	$319 (Delta)
One-way from	$280 (American Airlines)
Popular in	March
Cheapest in	April
Average price	$565

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. 0% potential increase in price ($4 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).

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Average for round-trip flights in July 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 julio 30, 2025.

sáb. 11/112:45 pmPWM - MSO

2 stops12h 28mDelta

mar. 11/48:00 amMSO - PWM

2 stops12h 19mDelta

Deal found 7/28

$319

vie. 9/123:28 pmPWM - MSO

1 stop9h 50mAmerican Airlines

vie. 9/1912:50 pmMSO - PWM

1 stop9h 09mAmerican Airlines

Deal found 7/29

$434

mar. 8/126:10 amPWM - MSO

1 stop7h 28mUnited Airlines

mar. 8/196:30 amMSO - PWM

1 stop7h 26mUnited Airlines

Deal found 7/30

$490

Best flights from Portland to Missoula
Discover carefully curated flight deals from Portland to Missoula that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 30, 2025.

sáb. 11/112:45 pmPWM - MSO

2 stops12h 28mDelta

mar. 11/48:00 amMSO - PWM

2 stops12h 19mDelta

Deal found 7/28

$319

vie. 9/123:28 pmPWM - MSO

1 stop9h 50mAmerican Airlines

vie. 9/1912:50 pmMSO - PWM

1 stop9h 09mAmerican Airlines

Deal found 7/29

$434

mar. 8/126:10 amPWM - MSO

1 stop7h 28mUnited Airlines

mar. 8/196:30 amMSO - PWM

1 stop7h 26mUnited Airlines

Deal found 7/30

$490

Last-minute flights from Portland to Missoula
Discover last-minute flight deals from Portland to Missoula. Data last updated julio 30, 2025 and is based on user searches.

mié. 7/306:15 amPWM - MSO

1 stop8h 00mAmerican Airlines

sáb. 8/212:47 pmMSO - PWM

1 stop8h 05mAmerican Airlines

Deal found 7/29

$539

mié. 8/66:10 amPWM - MSO

1 stop7h 28mUnited Airlines

lun. 8/116:15 amMSO - PWM

1 stop7h 34mUnited Airlines

Deal found 7/29

$727

mié. 8/611:21 amPWM - MSO

2 stops14h 08mAmerican Airlines

lun. 8/116:45 amMSO - PWM

2 stops12h 58mAmerican Airlines

Deal found 7/29

$754

mar. 8/126:10 amPWM - MSO

1 stop7h 28mUnited Airlines

mar. 8/196:30 amMSO - PWM

1 stop7h 26mUnited Airlines

Deal found 7/30

$490

One-way flights from Portland to Missoula
Search for one-way flight options from Portland to Missoula. Find affordable one-way fares based on user searches. Data last updated julio 30, 2025.

lun. 9/83:28 pmPWM - MSO

1 stop9h 50mAmerican Airlines

Deal found 7/30

$280

lun. 9/16:14 amPWM - MSO

1 stop7h 13mUnited Airlines

Deal found 7/30

$281

vie. 8/812:51 pmPWM - MSO

2 stops12h 55mDelta

Deal found 7/29

$541

Fly from

Fly to

Route

Depart

Return

Price

PortlandMissoula

PWM - MSO

PWMMSO

Portland

sáb. 11/1

12:45 pm-11:13 pm

2 stops12h 28m

Missoula Johnson-Bell Field

mar. 11/4

8:00 am-10:19 pm

2 stops12h 19m

$319

PortlandMissoula

PWM - MSO

PWMMSO

Portland

vie. 9/12

3:28 pm-11:18 pm

1 stop9h 50m

Missoula Johnson-Bell Field

vie. 9/19

12:50 pm-11:59 pm

1 stop9h 09m

$434

PortlandMissoula

PWM - MSO

PWMMSO

Portland

mar. 8/12

6:10 am-11:38 am

1 stop7h 28m

Missoula Johnson-Bell Field

mar. 8/19

6:30 am-3:56 pm

1 stop7h 26m

$490

PortlandMissoula

PWM - MSO

PWMMSO

Portland

lun. 9/8

3:28 pm-11:18 pm

1 stop9h 50m

$280

PortlandMissoula

PWM - MSO

PWMMSO

Portland

lun. 9/1

6:14 am-11:27 am

1 stop7h 13m

$281

PortlandMissoula

PWM - MSO

PWMMSO

Portland

vie. 8/8

12:51 pm-11:46 pm

2 stops12h 55m

$541

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 $506). 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.

How much does it cost to fly round-trip from Portland, Maine to Missoula?

Reviews of airlines servicing Missoula

Peruse reviews from past customers who have flown with Delta, 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.

Delta

8.0

Very good

7,980 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,980 reviews

Delta

8.0

Very good

7,980 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,896 reviews

Delta

8.0

Very good

7,980 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,980 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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 $319. Other airlines that can offer you cheap pricing are American Airlines, from $434, and United Airlines, from $490. These flights start at 50% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Portland, Maine to Missoula one-way?
$280 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $281 and $541, respectively.
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 $506). 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.

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Browse thousands of different options on Cheapflights for your next trip

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Other flights to Missoula

Top 2 airlines flying from Portland to Missoula

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$429	Average$678	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$463	Average$658	FlexibilityNo cancel fee	On-time69%

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$280+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.

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Find flight deals from Portland to Missoula

Cheapest flights from Portland to MissoulaExplore 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 julio 30, 2025.

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 julio 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Missoula that are best for you.

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.

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?

How much does it cost to fly round-trip from Portland, Maine to Missoula?

Reviews of airlines servicing Missoula

Peruse reviews from past customers who have flown with Delta, 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.

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.

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

What are the cheapest airlines to fly from Portland, Maine to Missoula one-way?

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

How can I find direct flights from Portland to Missoula?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to Missoula

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Portland to Missoula

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Travel Smart

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 julio 30, 2025.