PDX - IDA

$116 Find Cheap Flights from Portland to Idaho Falls

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Idaho Falls departing on 12/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Idaho Falls, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Idaho Falls, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Idaho Falls that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Idaho Falls

Mon, Dec 15 - Fri, Dec 19
Allegiant Air Logo
12:01 pm - 2:36 pmPDX-IDA
1h 35mnonstop
Allegiant Air Logo
4:26 pm - 5:11 pmIDA-PDX
1h 45mnonstop
$274Allegiant Air
Find Deal
Tue, Oct 21 - Sat, Oct 25
Hawaiian Airlines Logo
3:30 pm - 10:38 pmPDX-IDA
6h 08m1 stop
Hawaiian Airlines Logo
6:00 am - 1:43 pmIDA-PDX
8h 43m1 stop
$302Hawaiian Airlines
Find Deal
Wed, Oct 15 - Fri, Oct 17
Alaska Airlines Logo
1:25 pm - 10:38 pmPDX-IDA
8h 13m1 stop
Alaska Airlines Logo
4:15 pm - 6:20 amIDA-PDX
15h 05m1 stop
$332Alaska Airlines
Find Deal
Tue, Oct 21 - Sat, Oct 25
Delta Logo
5:30 am - 12:33 pmPDX-IDA
6h 03m2 stops
Delta Logo
1:15 pm - 7:19 pmIDA-PDX
7h 04m2 stops
$334Delta
Find Deal
Tue, Oct 21 - Sat, Oct 25
Alaska Airlines Logo
3:30 pm - 10:38 pmPDX-IDA
6h 08m1 stop
Alaska Airlines Logo
6:00 am - 1:25 pmIDA-PDX
8h 25m2 stops
$341Alaska Airlines
Find Deal
Sat, Oct 11 - Sat, Oct 18
Alaska Airlines Logo
6:00 am - 3:38 pmPDX-IDA
8h 38m1 stop
Alaska Airlines Logo
6:00 am - 12:25 pmIDA-PDX
7h 25m1 stop
$342Alaska Airlines
Find Deal
Sat, Oct 11 - Tue, Oct 14
Delta Logo
5:00 pm - 10:30 pmPDX-IDA
4h 30m1 stop
Delta Logo
6:00 am - 9:03 amIDA-PDX
4h 03m1 stop
$357Delta
Find Deal
Fri, Oct 24 - Mon, Oct 27
Alaska Airlines Logo
3:30 pm - 3:38 pmPDX-IDA
23h 08m1 stop
Alaska Airlines Logo
3:50 pm - 6:17 amIDA-PDX
15h 27m1 stop
$362Alaska Airlines
Find Deal
Mon, Dec 15 - Fri, Dec 19
 Logo
12:01 pm - 2:36 pmPDX-IDA
1h 35mnonstop
 Logo
9:20 pm - 3:33 pmIDA-PDX
19h 13m2 stops
Mon, Dec 15 - Fri, Dec 19
 Logo
12:01 pm - 2:36 pmPDX-IDA
1h 35mnonstop
 Logo
9:20 pm - 10:53 amIDA-PDX
38h 33m3 stops

Everything you should know

Top airlines
Allegiant Air
Cheapest • from $274 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
June
Cheapest • 58% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Nonstop flights
4 days a week
There are direct flights from Portland to Idaho Falls 4 days a week: Mon, Wed, Fri, Sat.
Direct flights
Direct flights
Direct flights
Direct flights
Cheapest round-trip
$274
Typical prices: $139-400
Allegiant Air
Mon 12/15Fri 12/19
PDX - IDA • Non-stop
Cheapest one-way
$116
Typical prices: $71-217
Allegiant Air
Fri 12/19
PDX - IDA • Non-stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Idaho Falls!
Booking Insights

KAYAK's insights & trends for Portland to Idaho Falls flights

Get data-powered insights and trends into flights from Portland to Idaho Falls to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Portland to Idaho Falls?

What’s the cheapest day of the week to fly from Portland to Idaho Falls?

The average price of all round-trip flights from Portland to Idaho Falls clicked on KAYAK for each day over the last 12 months.

For Portland to Idaho Falls, Monday is the cheapest day to fly on average and Friday is the most expensive. Flying from Idaho Falls back to Portland, the best deals are generally found on Monday, with Saturday being the most expensive.

What is the cheapest month to fly from Portland to Idaho Falls?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Idaho Falls, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Idaho Falls is June, where tickets cost $101 (return) on average. On the other hand, the most expensive months are September and November, where the average cost of round-trip tickets is $501 and $481 respectively.

Good to know

Low seasonOctober
Cheapest flight$116
Best time to beat the crowds but there is an average 61% increase in price.
Most popular time to fly and prices are also 42% lower on average.
Flight from Portland to Idaho Falls

When to book flights from Portland to Idaho Falls

Are your dates flexible? Find out the best times to travel from Portland to Idaho Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Idaho Falls

  • Will I be able to find any hotels with a location close to the Idaho Falls Regional Airport (IDA)?

    One option that sits just to the south of the entrance to the airport at the junction of Interstate 15 and Highway 20 is the Best Western Plus Cottontree Inn.

  • What types of rental car choices are available to me at the Idaho Falls Regional Airport, and where will I find a rental car company after my flight?

    There are roughly six different major rental car companies that operate at this airport, and all of them sit on the arrival side of the airport as you make your way to the baggage claim area. Once you have picked up your contract and your keys, you will find that all rental cars have a location in the parking lot adjacent to the terminal, right outside the exit of the baggage claim.

  • What are some transportation choices to get me from the Idaho Falls Regional Airport to the center of Idaho Falls after your flight?

    One option that utilizes public transportation is to travel on the Salt Lake Express buses that make the trip from the airport to the downtown area in around 5min. If you would instead like to take a taxi on this route, you should expect a travel time of about 9min.

  • If someone will be dropping me off at the Portland International Airport before a flight, where's the best place for them to drop me off?

    Drivers looking to drop off passengers can use one of the dedicated drop-off areas in front of the terminal building on both the upper and lower-level roadways. It is important to remember that only active unloading of passengers can occur in this location, and drivers cannot leave their vehicles unattended for any amount of time.

  • What is the cheapest flight from Portland to Idaho Falls?

    In the last 3 days, the lowest price for a flight from Portland to Idaho Falls was $116 for a one-way ticket and $274 for a round-trip.

  • Do I need a passport to fly between Portland and Idaho Falls?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from Portland to Idaho Falls?

    The Airbus A320-100/200 is the aircraft model that flies most regularly on the Portland to Idaho Falls flight route.

  • Which airline alliances offer flights from Portland to Idaho Falls?

    oneworld, and SkyTeam are the airline alliances operating flights between Portland and Idaho Falls, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Portland to Idaho Falls, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Portland to Idaho Falls are Alaska Airlines and Delta. With an average price for the route of $403 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $392 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Portland to Idaho Falls?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Idaho Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Idaho Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Idaho Falls from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Idaho Falls?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Idaho Falls with an airline and back to Portland with another airline. Booking your flights between Portland and IDA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Idaho Falls?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Idaho Falls from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Portland to Idaho Falls

  • Looking for a cheap flight? 25% of our users found flights on this route for $215 or less one-way.
  • One of the best ways for travelers to get from the downtown Portland area to the Portland International Airport (PDX) without having to drive in your own car is to take the Portland TriMet MAX Red Line that travels from the Old Town Station in downtown Portland to the airport in around 33 minutes.
  • If you want to drive your own car to the Portland International Airport, this airport offers the convenience of its valet parking system, where you can drop off your car right adjacent to the ticket counter. For an even faster service, passengers can check in on the airport website to notify staff of their arrival time at the airport.
  • If you want to find a way to pass some time at the Portland International Airport before a flight, The Art Program at Portland International Airport has a program that rotates works of art in nine different exhibits scattered throughout the terminal buildings.
  • For those passengers that may have difficulty hearing when traveling through the Portland International Airport, this airport features a visual paging system that shows all audio messages on flight information displayed scattered throughout the terminal buildings.
  • If you are making a plan to take a pet or a service animal with you on your trip through the Portland International Airport, this airport features an outdoor pet relief area as well as two indoor relief areas. The outdoor area is just outside of the baggage claim level in the southern part of the terminal building, and the two indoor areas sit near the Alaska Lounge in Concourse C and near Gate D5.

Prefer to fly direct from Portland to Idaho Falls?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Portland to Idaho Falls Fanning Field.
Find which airlines fly direct from Portland Airport to Idaho Falls Fanning Field Airport, which days they fly and book direct flights.

Direct departures

Portland to Idaho Falls Fanning Field

Monday

Allegiant Air

Allegiant Air

Wednesday

Allegiant Air

Allegiant Air

Friday

Allegiant Air

Allegiant Air

Saturday

Allegiant Air

Allegiant Air

See more direct flights

Direct returns

Idaho Falls Fanning Field to Portland

Monday

Allegiant Air

Allegiant Air

Wednesday

Allegiant Air

Allegiant Air

Friday

Allegiant Air

Allegiant Air

Saturday

Allegiant Air

Allegiant Air

See more direct flights

Reviews of the top 4 airlines serving from Portland to Idaho Falls

 
See real verified KAYAK customer reviews for airlines flying from Portland to Idaho Falls. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Idaho Falls? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.8Comfort
8.1Boarding
7.1Food
8.5Crew
7.0Entertainment
Airline reviews

Website could be better with faster access to specific flight information and boarding pass once reservation is made. Not a fan of no seat selection on line. I had to consult gate agent each time to change seats on flights with lots of open seats. This cannot possibly be cost effective for airline. On plus side, Alaska seat legroom seemed larger than American. ns

10.0 ExcellentAnonymous, Sep 2025PDX - DFW
Read more Alaska Airlines reviews

Website could be better with faster access to specific flight information and boarding pass once reservation is made. Not a fan of no seat selection on line. I had to consult gate agent each time to change seats on flights with lots of open seats. This cannot possibly be cost effective for airline. On plus side, Alaska seat legroom seemed larger than American. ns

Staff inside Portland terminal were rude, made us fell rushed and not at all accommodating to seniors. For this alone I will probably never booked from them again.

It was fine—the seats are not very comfortable and the aisles are very narrow. Nothing different from other airlines

I booked a round trip. I ordered a lunch going and a lunch for the return but got both lunches going. Could have been my error. Both lunches were good.

Well the flight being delayed multiple time really was frustrating. But the crew and flight was good.

generally good. No snacks or drinks on the flight 3379 from Portland to San Jose, CA. Sad.

Everything except for the lack of a choice of the snack provided was great.

I like the friendliness of the staff. The food choices were OK. I wish there was more options. The entertainment through the movie portal was alright.

First time flying with Alaska, and it went great. Thank you for a great experience flying to PDX.

There was a very drunk man behind me who kept talking loudly to no one in particular. He was slurring his words and at times he didn’t know where we were going or whether or not we landed. He was also loudly using a lot of profanity. The attendants didn’t seem to notice or care and in fact continued to serve him alcohol. He was allowed to purchase 4 little bottles.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

They we able to seat my companion and I next to each other. Plane’s temperature was very cool. Willl be more prepared on return trip.

All was good and they were able to seat my travel companion next to me. Thank you.

Like the ample leg room. May as well not bother with snacks if it's only a two ounce bag of pretzels. Didn't use the entertainment option. Was there one?

What an amazing flight. I haven’t experienced this level of service in a flight in years. This will be the only way to fly to Hawaii for me in the future.

Kayak sold me a ticket after check in time. Could not check in. Could not get on flight.

Love you guys are so friendly and kind and wonderful

Agents talk too fast over intercom. I know it’s memorized and we’ve all heard it before. Just slow down a little. Stop charging for checked bags. I was pleased to get my bags promptly at each end of my flight.

Everything was great except having to check in at Alaska. That was a surprise and took extra time and effort. Should have been explained somewhere maybe on the HA electronic ticket.

It was clean and the crew was great. I wish the chairs could recline just a little more and you would provide small pillows for people with bad backs. My back is fused and a little support would be great.

I accidentally made this purchase and they wouldn’t refund me even though I called immediately to cancel it.

Crew was great. No entertainment and food and beverage was for purchase only, even water

It was canceled. The flight wasn’t rescheduled, everyone had to figure out their own new arrangements. They said we would get refunded our original fare and receive an additional $150. We received links for $100 only and they expired before we could activate them.

The plane had originated in Las Vegas at 6:30 in the morning and flew to Moline where we boarded. The flight left around 12:30 PM and there were no boxed snacks available and many of the alcoholic beverages were unavailable. I would find it hard to believe that that many of the passengers coming from Las Vegas at 6:30 in the morning, drank and ate that much of the items. I can only come to the conclusion that someone failed to stock the plane for the round-trip. This is a huge revenue failure for the airline and disappointment for the passengers. The flight crew did not seem happy to be there and did not engage with passengers. Allegiant you can do better.

They did not let my husband on the plane with our service animal at the last minute. Do NOT fly this airline with a service animal!

Tight! Seats are not designed for those of us who wear extra-large clothes.

The non-stop flight from Grand Rapids was excellent. I neither expected or needed a budget flight and Allegiant made the trip easy and for an affordable price, Arriving at the Mesa Airport (AZA) is a delight compared to the international airport. For our return flight, we were able to arrive 75 minutes before the flight, return the rental car, check our bag and make it to the gate in plenty of time. That would never happen at most airports.

Easiest flights I’ve ever taken. Plane was comfortable without overly crowded seating.

Terrible. Still have not received the refund from them. They sent it to some account that I don't even know. Spoke with costumer service and they are unable to help.

I didn’t like it at all. I miss my second flight because of the delay on Allegiant Air now I m stuck in MCO.

Good, but a bit late on take off after loading. Don't like charging for carry ons!

Everything you need to know for your flight from Portland to Idaho Falls

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.