$128 Cheap Flights from Portland (PDX) to Idaho Falls (IDA)

View $128 flight on Wed, May 28, 2025Opens in a new window

Popular airlines from Portland International Airport (PDX) to Idaho Falls Regional Airport (IDA)

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Find available prices by choosing your travel dates.

Cheap Flights from Portland to Idaho Falls (PDX-IDA)

Prices were available within the past 7 days and start at $128 for one-way flights and $256 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, May 20 - Wed, Jun 4
PDX
Portland
IDA
Idaho Falls
$256 Roundtrip, found 3 days ago
$256
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, May 20 from Portland to Idaho Falls, returning Wed, Jun 4, priced at $256 found 3 days ago
Delta
Tue, May 27 - Tue, Jun 10
PDX
Portland
IDA
Idaho Falls
$257 Roundtrip, found 3 days ago
$257
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, May 27 from Portland to Idaho Falls, returning Tue, Jun 10, priced at $257 found 3 days ago
Hawaiian Airlines
Tue, May 13 - Thu, May 22
PDX
Portland
IDA
Idaho Falls
$280 Roundtrip, found 23 hours ago
$280
Roundtrip
found 23 hours ago
Select Hawaiian Airlines flight, departing Tue, May 13 from Portland to Idaho Falls, returning Thu, May 22, priced at $280 found 23 hours ago
Hawaiian Airlines
Tue, Jul 15 - Mon, Jul 21
PDX
Portland
IDA
Idaho Falls
$291 Roundtrip, just found
$291
Roundtrip
just found
Select Hawaiian Airlines flight, departing Tue, Jul 15 from Portland to Idaho Falls, returning Mon, Jul 21, priced at $291 just found
Delta
Tue, Jun 10 - Thu, Jun 12
PDX
Portland
IDA
Idaho Falls
$295 Roundtrip, found 1 hour ago
$295
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Jun 10 from Portland to Idaho Falls, returning Thu, Jun 12, priced at $295 found 1 hour ago
Alaska Airlines
Thu, May 29 - Wed, Jun 11
PDX
Portland
IDA
Idaho Falls
$299 Roundtrip, found 3 days ago
$299
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 29 from Portland to Idaho Falls, returning Wed, Jun 11, priced at $299 found 3 days ago
Alaska Airlines
Tue, May 20 - Wed, May 21
PDX
Portland
IDA
Idaho Falls
$304 Roundtrip, found 6 hours ago
$304
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Tue, May 20 from Portland to Idaho Falls, returning Wed, May 21, priced at $304 found 6 hours ago
United
Wed, May 21 - Tue, Jun 10
PDX
Portland
IDA
Idaho Falls
$305 Roundtrip, found 5 days ago
$305
Roundtrip
found 5 days ago
Select United flight, departing Wed, May 21 from Portland to Idaho Falls, returning Tue, Jun 10, priced at $305 found 5 days ago
Alaska Airlines
Wed, Jul 16 - Mon, Jul 21
PDX
Portland
IDA
Idaho Falls
$306 Roundtrip, just found
$306
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jul 16 from Portland to Idaho Falls, returning Mon, Jul 21, priced at $306 just found
American Airlines
Wed, Feb 18 - Tue, Feb 24
PDX
Portland
IDA
Idaho Falls
$450 Roundtrip, found 3 days ago
$450
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Feb 18 from Portland to Idaho Falls, returning Tue, Feb 24, priced at $450 found 3 days ago
Flights from Portland (PDX) to Idaho Falls (IDA)
Origin airport
Portland Intl.
Destination airport
Idaho Falls Regional
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$256
Distance
536 mi

Portland to Idaho Falls Flights

The cheapest times to fly from Portland to Idaho Falls

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to Idaho Falls are during the month of May. You can find some of the cheapest flights from Portland to Idaho Falls with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Portland to Idaho Falls

Sunday is one of the best days to book for cheap flights from Portland to Idaho Falls: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Portland to Idaho Falls

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to Idaho Falls in 2025. You can also book with separate airlines for your outbound and return journeys, from $128 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to Idaho Falls flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to Idaho Falls airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA) cost?
Discover the latest flight deals from PDX to IDA by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from PDX to IDA?
The cheapest flights from PDX to IDA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from PDX to IDA?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from PDX to IDA. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA)?
On average, Portland Intl. Airport (PDX) offers 2 nonstop flights to Idaho Falls Regional Airport (IDA) per week. If you’re looking for more choice, use Expedia’s filters to look for flights with layovers. Squeeze in a quick visit to another location or simply break up your travels.
What are the most popular departure times for flights from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA)?
Flights between PDX and IDA are their busiest at 11 AM. If you’d like a less crowded experience and potentially cheaper prices, choose a time when demand is lower.
What day of the week has the most flights from PDX to IDA?
If you jet off on a Friday, you’ll get the greatest range of options for flights from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA).
What is the earliest flight from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA)?
Portland Intl. Airport (PDX)’s first flight to Idaho Falls Regional Airport (IDA) departs at approximately 11:15AM UTC-8. With a total flight time of 1h 41m, you’ll land at around 1:56PM UTC-7.
How long does it take to fly from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA)?
It takes around 1 hour and 41 minutes to travel the 540 mi from PDX to IDA.
What is the best time to fly from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA)?
Choose a flight from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Idaho Falls from Portland Intl. Airport (PDX)?
If you’re boarding a direct flight from Portland Intl. Airport (PDX) to Idaho Falls, Idaho Falls Regional Airport (IDA) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA) last-minute?
Holding off until right before your break to book a ticket from PDX to IDA generally means paying more. While you might find some last-minute discounts, they’re not always guaranteed. Be flexible with your travel plans for the best chance of snagging a bargain.
Is it cheaper to book a PDX to IDA flight and hotel package?
Securing a PDX to IDA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our wide range of accommodations and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Idaho Falls Regional Airport (IDA)?
You can usually reschedule or cancel your PDX to IDA flight. However, if it’s been more than 24 hours since booking, additional charges may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and if any costs are involved. You’ll also find more information on our Customer Service portal.

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*Available to One Key members.