Cheap flights from Idaho Falls to Portland from $134

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 $153.

The cheapest day to depart on your flight to Portland is on a Monday when prices can be found for as low as $240. 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 $387.

The cheapest time of day to fly to Portland is at noon when flights can be purchased for as low as $255. In the afternoon is when there is more demand to fly to Portland, so prices are often more expensive at around $317 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 $302 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 $123 on momondo.

There are 4 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 November 2026, prices for Idaho Falls to Portland flights are approximately 34% more expensive when compared to flights at the same time last year.

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

Alaska Airlines, Allegiant Air and Delta are the top three most popular airlines that fly to Portland from Idaho Falls according to our data. Alaska Airlines is the first choice among our users, with 40% 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.

As of November 2026, 1 flights take off from Idaho Falls and land in Portland each day. The most common flight departure time for this route is 3:00PM, with 100% of daily flights taking off in the afternoon.

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