Cheap flights from Portland to Missoula from $139

The month of April is, on average, the cheapest month to fly to Missoula from Portland, with most prices found around $237. If you are unable to visit Missoula during the month of April, then departing from Portland during the month September is also very affordable. Most momondo users find prices during this month for around $278.

On average, the least expensive day to fly to Missoula from Portland is on a Saturday. momondo users have found tickets for Saturday departures for as low as $331. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Portland because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $458.

The cheapest time of day to fly to Missoula is in the evening when flights can be purchased for as low as $307. Flights at noon are often more expensive with an average ticket price of $518.

Fly from Portland to Missoula Johnson-Bell Field for the best Portland - Missoula Johnson-Bell Field flight prices

You are more likely to see cheaper flights to Missoula from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Missoula for around $373 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missoula from Portland for as low as $298 on momondo.

There are 4 cabin classes available to choose from on Portland to Missoula flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 33% on your flight if you consider stops on a Portland to Missoula flight.

As of August 2026, 1 flights take off from Portland and land in Missoula each day. The most common flight departure time for this route is 2:00PM, with 100% of daily flights taking off in the afternoon.

7 flights are operational weekly from Portland to Missoula as of August 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.