Cheap Flights from Portland to Idaho Falls

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Compare Portland to Idaho Falls flight deals

Find the cheapest month or even day of the year to fly to Idaho Falls

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Find the cheapest month to fly from Portland to Idaho Falls

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Portland to Idaho Falls flights are currently cheapest in July.

Direct flights from Portland to Idaho Falls

Portland to Idaho Falls: Alternative routes

Compare routes from Portland to Idaho Falls below. You may find an airport to fly into that's cheaper, faster, or easier than Idaho Falls.

Portland to Idaho Falls: Flight information

The things to know before you go.
Cheapest flight foundRs11,531
Cheapest month to flyJuly
Average flight time1 hr, 37 mins
Most popular airlineAllegiant Air
Average flights per week3

Finding cheap flights from Portland to Idaho Falls: Frequently asked questions

The best price we found for a return flight from Portland to Idaho Falls is Rs24,004. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 37 minutes is the average flight time from Portland to Idaho Falls.
Allegiant Air flies direct from Portland to Idaho Falls.
As of June 2025, there are 3 flights per week flying from Portland to Idaho Falls.
The cheapest month to fly from Portland to Idaho Falls is usually June 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Portland Airport to Idaho Falls Airport on Friday, 18 July 2025.
Yes – the average flight time is 1 hour and 37 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Idaho Falls but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Idaho Falls is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Allegiant Air offers the cheapest flight tickets to Idaho Falls.

Travelling from Portland International Airport (PDX) to Idaho Falls Regional Airport (IDA): what you need to know

  • The average length of a direct flight from Portland International Airport to Idaho Falls Regional Airport is 1 hour 35 minutes.

  • To ensure you catch your PDX to IDA flight, allow plenty of time to check in and drop off your luggage. Arriving two hours ahead of international departures and an hour before domestic flights is the general rule.

  • Flying during a peak month like July? School holidays and other popular seasons can lead to longer lines and delays at airport checkpoints. Be extra cautious and get there up to four hours ahead of an international flight and two hours before domestic departures.

  • Flying into Idaho Falls (and then exploring more of United States!) is a breeze with Allegiant Air. This popular airline has direct flights from Portland International Airport to Idaho Falls Regional Airport.

  • Allegiant Air is the airline most travellers choose for this route.

  • With 66.67% of services landing on schedule, Allegiant Air is the most punctual carrier offering PDX to IDA flights.

  • If you want to add a stop to your trip, simply deselect 'Direct flights only' when searching for your ticket from Portland International Airport to Idaho Falls Regional Airport. Here are the most popular stopovers between PDX and IDA:

    • Denver International Airport

    • Metropolitan Oakland International Airport

    • Phoenix Sky Harbour International Airport

How to find the cheapest flights from Portland International Airport (PDX) to Idaho Falls Regional Airport (IDA)

  • The cheapest price we've seen for a one-way Portland International Airport to Idaho Falls Regional Airport flight is Rs11,531. A round-trip fare right now is Rs24,004. Depending on the availability and when you book, these fares could change.

  • Score cheap tickets from PDX to IDA by booking at least eight months ahead. Based on our research, that's the sweet spot for finding the biggest deals.

  • July is the cheapest month for flights from Portland International Airport to Idaho Falls Regional Airport. If you prefer to travel during a different time of year, the 'Whole month' tool will show you the lowest prices for each month.

  • There's no need to check every day to see if fares have dropped when you create a Price Alert. We'll let you know as soon as the price changes on cheap flights from PDX to IDA.

  • Tailor your flights using filters. Choose your ideal departure and arrival times, total journey duration and airlines. You can also sort your results by 'Fastest,' 'Best' or 'Cheapest' flights from Portland International Airport to Idaho Falls Regional Airport.

Handy information about Portland International Airport (PDX)

  • PDX is located at 7000 NE Airport Way.

  • Portland International Airport scores top marks for its on-time performance. 83.65% of flights that depart PDX reach their destination on time.

  • To get to Portland International Airport from central Portland, it'll take about 20 minutes if you're planning to drive. This depends on traffic though. It's approximately 19 kilometres from the airport to the city centre.

  • Taking public transport? You can expect a journey time of around 45 minutes.

  • Get your journey off to a relaxed start by staying near PDX. Whether you're taking an early flight from Portland International Airport to Idaho Falls Regional Airport or just don't like being rushed, these stays are the answer:

Arriving at Idaho Falls Regional Airport (IDA)

  • The last thing you need is a long trip to your hotel if you're arriving on a late Portland International Airport to Idaho Falls Regional Airport flight. Reserve one of these accommodation options near IDA instead:

  • Pick up an Idaho Falls Regional Airport rental car and discover Idaho Falls and beyond with your own wheels. Budget, Avis and Alamo are popular providers you can book with here.

  • Increase the odds of getting the best deal by booking as early as you can. Reserving your ride from Idaho Falls Regional Airport at least a couple of weeks ahead is a smart idea.

Getting from Idaho Falls Regional Airport (IDA) to central Idaho Falls

  • You'll find IDA at 2140 North Skyline.

  • Idaho Falls Regional Airport is approximately 5 kilometres from the centre of Idaho Falls. The drive time takes about 10 minutes.

  • Getting there on public transport will take you around 1 hour.

When to fly to Idaho Falls Regional Airport (IDA)

  • July is the most popular month for flights from Portland International Airport to Idaho Falls Regional Airport. For smaller crowds, travel to Idaho Falls in February.

  • Before locking in your flight from Portland International Airport to Idaho Falls Regional Airport, think about the type of weather you like. July is the warmest month in Idaho Falls, with the temperature ranging from 11ºC to 35ºC.

  • Look for cheap tickets from PDX to IDA in January if you like cooler conditions. Temperatures are at their lowest around then, ranging between -15ºC and 1ºC on average.

Explore more of United States

  • Idaho Falls has its own special appeal, but there are so many other corners of United States just waiting to be explored. Around 306 kilometres south of Idaho Falls, a trip to Salt Lake City will keep you busy. Start with attractions like Temple Square, Utah State Capitol and Red Butte Garden.

  • Boise is another sought-after destination in United States and is around 338 kilometres west of Idaho Falls. No journey is complete without visiting Idaho State Capitol Building, Old Idaho Penitentiary and Zoo Boise.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.