Cheap flights from Montana to Portland from $112

The cheapest month to fly to Portland from Montana is in October. Flight prices, which tend to average around $161, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in October, then you should wait until September to fly from Montana, when ticket prices are also cheap, with an average price of $189.

The cheapest day to depart on your flight to Portland is on a Thursday when prices can be found for as low as $275. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Sunday, with ticket prices averaging around $401.

The cheapest time of day to fly to Portland is at noon when flights can be purchased for as low as $299. In the evening is when there is more demand to fly to Portland, so prices are often more expensive at around $558 per ticket.

Fly from Kalispell Glacier Park to Portland for the best Montana - Portland flight prices

You are more likely to see cheaper flights to Portland from Montana when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $246 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Montana for as low as $147 on momondo.

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

United Airlines, Alaska Airlines, and Southwest are the most popular carriers operating from Montana to Portland

Alaska Airlines, Hawaiian Airlines and Delta are the top three most popular airlines that fly to Portland from Montana according to our data. Alaska Airlines is the first choice among our users, with 74% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 3 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.

The number of flights available between Montana and Portland is 8 per day as of March 2026. The most frequent departure time is 12:00PM, with 100% of daily flights leaving in the afternoon.

59 flights are operational weekly from Montana to Portland as of March 2026. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.