HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho Falls

$149+ Cheap flights from Portland to Idaho Falls (PDX - IDA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — IDA
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Idaho Falls with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Portland to Idaho Falls Fanning Field are usually found in June or February, booked 83 days in advance, depart on a Friday or Wednesday and return on a Monday

Cheap flight deals from Portland to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Idaho Falls (IDA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 29, 2025.

Round-trip from

$165
(Gotogate)

One-way from

$149
(Alaska Airlines)

Popular in

September

Cheapest in

June

Average price

$184

Good round-trip deal

$68 or less

Good one-way deal

$114 or less
From Portland to Idaho Falls Fanning Field
Search Deals
One-way flight from Portland to Idaho Falls Fanning Field
Search Deals
Highest demand for flights based on searches. 42% potential increase in price ($177 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Portland to Idaho Falls Fanning Field.
Search Deals
Price to beat on a one-way flight from Portland to Idaho Falls Fanning Field.
Search Deals

Find flight deals from Portland to Idaho Falls

Cheapest flights from Portland to Idaho Falls
Explore the most affordable flight options available from Portland to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Gotogate deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/81:38 pmPDX - IDA
Nonstop1h 36mAllegiant Air
Mon 8/115:04 pmIDA - PDX
Nonstop1h 37mAllegiant Air
Deal found 7/27$165
This Mytrip deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/111:38 pmPDX - IDA
Nonstop1h 36mMultiple Airlines
Fri 8/157:31 pmIDA - PDX
2 stops24h 26mMultiple Airlines
Deal found 7/27$219
This Hawaiian Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/35:47 pmPDX - IDA
1 stop3h 52mHawaiian Airlines
Wed 9/103:57 pmIDA - PDX
1 stop6h 28mHawaiian Airlines
Deal found 7/28$290
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/35:30 amPDX - IDA
2 stops7h 49mDelta
Wed 9/106:52 pmIDA - PDX
2 stops6h 00mDelta
Deal found 7/28$295
This Alaska Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:41 pmPDX - IDA
1 stop18h 57mAlaska Airlines
Sat 10/256:00 amIDA - PDX
1 stop7h 25mAlaska Airlines
Deal found 7/27$304

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from Portland to Idaho Falls that are best for you.

Fly from

Portland

Fly to

Idaho Falls

Route

Depart

Return

Price

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 8/8

1:38 pm-4:14 pm

Nonstop1h 36m

Idaho Falls Fanning Field

Mon 8/11

5:04 pm-5:41 pm

Nonstop1h 37m

$165

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 8/11

1:38 pm-4:14 pm

Nonstop1h 36m

Idaho Falls Fanning Field

Fri 8/15

7:31 pm-6:57 pm

2 stops24h 26m

$219

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Wed 9/3

5:47 pm-10:39 pm

1 stop3h 52m

Idaho Falls Fanning Field

Wed 9/10

3:57 pm-9:25 pm

1 stop6h 28m

$290

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Wed 9/3

5:30 am-2:19 pm

2 stops7h 49m

Idaho Falls Fanning Field

Wed 9/10

6:52 pm-11:52 pm

2 stops6h 00m

$295

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 10/20

7:41 pm-3:38 pm

1 stop18h 57m

Idaho Falls Fanning Field

Sat 10/25

6:00 am-12:25 pm

1 stop7h 25m

$304

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Wed 8/27

4:46 pm-10:39 pm

1 stop4h 53m

$149

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 9/12

5:10 pm-10:25 pm

1 stop4h 15m

$220

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Tue 8/12

5:35 pm-10:39 pm

1 stop4h 04m

$333

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Sat 8/9

6:15 pm-5:04 pm

2 stops21h 49m

$382

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 8/11

5:00 am-3:29 pm

1 stop9h 29m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Best time to book a flight from Portland to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from Portland to Idaho Falls?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Idaho Falls. Price data was last updated on July 25, 2025.

Booking 83 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland to Idaho Falls. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Portland to Idaho Falls?

Currently, October is the cheapest month in which you can book a flight from Portland to Idaho Falls (average of $380). Flying from Portland to Idaho Falls in December is currently the most expensive (average of $578). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PDX to IDA?

Find hourly flight availability from Portland to Idaho Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

It’s typically best to fly out from Portland to Idaho Falls at noon. Doing so could potentially save you 79% on the flight price compared to flying in the evening, which is usually more expensive.

How much does it cost to fly round-trip from Portland to Idaho Falls?

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho Falls. Reviews last updated July 29, 2025.
Read through reviews of airlines operating flights from Portland to Idaho Falls, such as Alaska Airlines, Delta, and Hawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,605 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Allegiant Air
7.2
Good
702 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Portland to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Portland to Idaho Falls flight route?

    Within the past month, 1 users have taken a look at flights from Portland to Idaho Falls Fanning Field.

  • What are the cheapest airlines flying from Portland to Idaho Falls round-trip?

    Our cheapest airline available from Portland to Idaho Falls is Allegiant Air. Our recent data shows that you can find tickets from as low as $165 on this airline. Additional options worth looking into are Hawaiian Airlines and Delta, starting at $290 and $295 round-trip. These flights start at 30% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Portland to Idaho Falls one-way?

    One-way options have recently been found by users for as low as $149 on Alaska Airlines. Other airlines that offer cheap prices include Delta from $220 and Hawaiian Airlines from $333 one-way.

  • What are the cheapest flights from Portland to Idaho Falls?

    While on average a flight from Portland to Idaho Falls is generally $123, our data shows the cheapest flight currently is $68. When looking at the most popular route, (Portland - Idaho Falls Fanning Field), you can expect to pay $165 for that flight.

  • Can I find deals for flights from Portland to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on Portland to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Idaho Falls.

  • Can I find deals for business class flights from Portland to Idaho Falls?

    Yes. Cheapflights offers flight deals from Portland to Idaho Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, October is the cheapest month in which you can book a flight from Portland to Idaho Falls (average of $380). Flying from Portland to Idaho Falls in December is currently the most expensive (average of $578). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 4 airlines flying from Portland to Idaho Falls

Discover the top 4 airlines that operate flights from Portland to Idaho Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$68Average$110FlexibilityNo cancel feeOn-time88%
DeltaCheapest$171Average$389FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$184Average$358FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$267Average$420FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.