Cheap flights from Idaho Falls to Portland from $43

The cheapest month to fly to Portland from Idaho Falls is in June. Flight prices, which tend to average around $119, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in June, then you should wait until July to fly from Idaho Falls, when ticket prices are also cheap, with an average price of $129.

The cheapest day to depart on your flight to Portland is on a Friday when prices can be found for as low as $148. 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 Tuesday, with ticket prices averaging around $483.

The cheapest time of day to fly to Portland is in the afternoon when flights can be purchased for as low as $246. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $255 per ticket.

Fly from Idaho Falls Fanning Field to Portland for the best Idaho Falls Fanning Field - Portland flight prices

You are more likely to see cheaper flights to Portland from Idaho Falls when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $321 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Idaho Falls for as low as $105 on momondo.

There are 2 cabin classes available to choose from on Idaho Falls to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Idaho Falls to Portland.

As of June 2026, prices for Idaho Falls to Portland flights are approximately 19% more expensive when compared to flights at the same time last year.

Allegiant Air is the most popular carrier operating from Idaho Falls Fanning Field to Portland

Allegiant Air, Delta and Alaska Airlines are the top three most popular airlines that fly to Portland from Idaho Falls according to our data. Allegiant Air is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 4 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.

As of June 2026, 1 flights take off from Idaho Falls and land in Portland each day. The most common flight departure time for this route is 4:00PM, with 75% of daily flights taking off in the afternoon.

8 flights are operational weekly from Idaho Falls to Portland as of June 2026. The most popular departure day for this route is Mon, with 25% of flights per week taking off on this day.