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Cheap flights from Portland to Idaho Falls from $127

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

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Find the cheapest flights from Portland to Idaho Falls

Cheap round-trip flights

Logo
7:22 pm - 4:05 pmPDX-IDA
19h 43m1 stop
Logo
9:39 pm - 11:11 amIDA-PDX
14h 32m1 stop
$310
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Thu, Sep 25 - Mon, Sep 29
Alaska Airlines Logo
10:00 pm - 10:38 pmPDX-IDA
23h 38m1 stop
Alaska Airlines Logo
4:15 pm - 9:00 amIDA-PDX
17h 45m1 stop
$362Alaska Airlines
Find Deal
Fri, Oct 17 - Mon, Oct 20
Alaska Airlines Logo
6:00 pm - 3:38 pmPDX-IDA
20h 38m1 stop
Alaska Airlines Logo
4:15 pm - 1:43 pmIDA-PDX
22h 28m1 stop
$363Alaska Airlines
Find Deal
Tue, Oct 21 - Fri, Oct 24
Logo
7:22 pm - 4:05 pmPDX-IDA
19h 43m1 stop
Logo
9:39 pm - 10:34 pmIDA-PDX
25h 55m2 stops
$371
Find Deal
Thu, Sep 25 - Mon, Sep 29
Alaska Airlines Logo
1:25 pm - 3:38 pmPDX-IDA
25h 13m1 stop
Alaska Airlines Logo
6:00 am - 6:20 amIDA-PDX
25h 20m1 stop
$382Alaska Airlines
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Fri, Oct 17 - Mon, Oct 20
United Airlines Logo
5:00 am - 8:52 pmPDX-IDA
14h 52m1 stop
United Airlines Logo
5:56 pm - 9:30 amIDA-PDX
16h 34m1 stop
$446United Airlines
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Tue, Sep 30 - Fri, Oct 3
Delta Logo
11:10 am - 6:13 pmPDX-IDA
6h 03m2 stops
Delta Logo
6:53 pm - 11:43 pmIDA-PDX
5h 50m1 stop
$475Delta
Find Deal
Fri, Oct 17 - Mon, Oct 20
Hawaiian Airlines Logo
3:30 pm - 10:38 pmPDX-IDA
6h 08m1 stop
Hawaiian Airlines Logo
6:00 am - 10:53 amIDA-PDX
5h 53m1 stop
$476Hawaiian Airlines
Find Deal
Thu, Oct 9 - Thu, Oct 16
Delta Logo
1:40 pm - 10:25 pmPDX-IDA
7h 45m2 stops
Delta Logo
1:15 pm - 8:51 pmIDA-PDX
8h 36m2 stops
$484Delta
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Fri, Sep 26 - Sat, Nov 8
Hawaiian Airlines Logo
3:30 pm - 10:38 pmPDX-IDA
6h 08m1 stop
Hawaiian Airlines Logo
6:00 am - 9:00 amIDA-PDX
4h 00m1 stop
$510Hawaiian Airlines
Find Deal
Thu, Oct 9 - Mon, Oct 13

United Airlines flights from Portland to Idaho Falls

Our best United Airlines deals on Portland to Idaho Falls flight tickets
United Airlines
Sep 30
PDX5:00 amPortland
14h 52m
1 stop
IDA8:52 pmIdaho Falls Fanning Field
Oct 3
IDA5:56 pmIdaho Falls Fanning Field
16h 34m
1 stop
PDX9:30 amPortland
$446
Find similar
United Airlines
Sep 19
PDX5:00 amPortland
14h 54m
1 stop
IDA8:54 pmIdaho Falls Fanning Field
Sep 23
IDA4:00 pmIdaho Falls Fanning Field
18h 28m
1 stop
PDX9:28 amPortland
$630
Find similar
United Airlines
Sep 17
PDX6:27 pmPortland
14h 20m
1 stop
IDA9:47 amIdaho Falls Fanning Field
Sep 19
IDA4:15 pmIdaho Falls Fanning Field
21h 48m
1 stop
PDX1:03 pmPortland
$789
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Hawaiian Airlines flights from Portland to Idaho Falls

Our best Hawaiian Airlines deals on Portland to Idaho Falls flight tickets
Hawaiian Airlines
Oct 9
PDX3:30 pmPortland
6h 08m
1 stop
IDA10:38 pmIdaho Falls Fanning Field
Oct 16
IDA6:00 amIdaho Falls Fanning Field
5h 53m
1 stop
PDX10:53 amPortland
$476
Find similar
Hawaiian Airlines
Oct 9
PDX3:30 pmPortland
6h 08m
1 stop
IDA10:38 pmIdaho Falls Fanning Field
Oct 13
IDA6:00 amIdaho Falls Fanning Field
4h 00m
1 stop
PDX9:00 amPortland
$510
Find similar
Hawaiian Airlines
Nov 26
PDX5:30 pmPortland
5h 32m
1 stop
IDA12:02 amIdaho Falls Fanning Field
Nov 30
IDA6:00 amIdaho Falls Fanning Field
4h 50m
1 stop
PDX9:50 amPortland
$671
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Portland to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Thu 9/25

7:22 pm-4:05 pm

1 stop19h 43m

Idaho Falls Fanning Field

Mon 9/29

9:39 pm-11:11 am

1 stop14h 32m

$310

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 10/17

10:00 pm-10:38 pm

1 stop23h 38m

Idaho Falls Fanning Field

Mon 10/20

4:15 pm-9:00 am

1 stop17h 45m

$362

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Tue 10/21

6:00 pm-3:38 pm

1 stop20h 38m

Idaho Falls Fanning Field

Fri 10/24

4:15 pm-1:43 pm

1 stop22h 28m

$363

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Thu 9/25

7:22 pm-4:05 pm

1 stop19h 43m

Idaho Falls Fanning Field

Mon 9/29

9:39 pm-10:34 pm

2 stops25h 55m

$371

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 10/17

1:25 pm-3:38 pm

1 stop25h 13m

Idaho Falls Fanning Field

Mon 10/20

6:00 am-6:20 am

1 stop25h 20m

$382

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Tue 9/30

5:00 am-8:52 pm

1 stop14h 52m

Idaho Falls Fanning Field

Fri 10/3

5:56 pm-9:30 am

1 stop16h 34m

$446

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 10/17

11:10 am-6:13 pm

2 stops6h 03m

Idaho Falls Fanning Field

Mon 10/20

6:53 pm-11:43 pm

1 stop5h 50m

$475

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Thu 10/9

3:30 pm-10:38 pm

1 stop6h 08m

Idaho Falls Fanning Field

Thu 10/16

6:00 am-10:53 am

1 stop5h 53m

$476

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 9/26

1:40 pm-10:25 pm

2 stops7h 45m

Idaho Falls Fanning Field

Sat 11/8

1:15 pm-8:51 pm

2 stops8h 36m

$484

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Thu 10/9

3:30 pm-10:38 pm

1 stop6h 08m

Idaho Falls Fanning Field

Mon 10/13

6:00 am-9:00 am

1 stop4h 00m

$510

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Idaho Falls from

How to get the cheapest flight ticket from Portland to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of June, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $126.

What is the cheapest day to depart on your flight to Idaho Falls?

Our data shows that Monday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $89. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Friday is $105.

What is the cheapest time of day to depart on your flight to Idaho Falls?

Our most recent data shows that the best time of day to fly to Idaho Falls is at noon. Flights from Portland to Idaho Falls during this time can be as low as $90. Try not to purchase tickets in the evening because they tend to be around $413. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Portland to Idaho Falls Fanning Field flight route?

Fly from Portland to Idaho Falls Fanning Field for the best Portland - Idaho Falls Fanning Field flight prices

What cabin class options are available on Portland to Idaho Falls Fanning Field flights?

There is only 1 cabin class available to choose from on Portland to Idaho Falls Fanning Field flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Portland to Idaho Falls flight prices changed over time?

As of September 2025, prices for Portland to Idaho Falls flights are approximately 147% more expensive when compared to flights at the same time last year.

When to book flights from Portland to Idaho Falls

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Idaho Falls according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to Idaho Falls (PDX to IDA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Idaho Falls

Fastest flight time

1h 35m

Direct flights

Sat

Airports in Idaho Falls

1 airport
The fastest flight from Portland to Idaho Falls takes 1h 35m
Direct flights go from Portland to Idaho Falls on Saturday. The only airline offering direct flights is Allegiant Air.
There is 1 airport near Idaho Falls: Idaho Falls Fanning Field (IDA)
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  • How far is Portland to Idaho Falls Fanning Field by plane?

    Idaho Falls Fanning Field is 542.6 mi away from Portland. Typically, this will take 3h 52m by plane in normal conditions.

  • When did momondo last update prices for flights from Portland Airport to Idaho Falls Fanning Field Airport?

    Prices for flights from Portland Airport to Idaho Falls Fanning Field Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Portland Airport to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from Portland Airport to Idaho Falls Fanning Field Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The travel and health documents you'll need for your trip to Idaho Falls Fanning Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Portland to Idaho Falls?

  • What is the most popular airline from Portland to Idaho Falls?

Best airlines flying from Portland to Idaho Falls

Compare and see reviews for airlines that fly from Portland to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $56Free CancellationRating
7.2
702 reviews
Search Allegiant Air flights
DeltaPriceFrom $171Free CancellationRating
7.9
7,960 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $184Free CancellationRating
7.8
2,723 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $256Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

Traveling to a place near Idaho Falls?

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

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Idaho Falls?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Idaho Falls from Portland.

Can I find flights from Portland to Idaho Falls with flexible booking policies on momondo?

All flight searches from Portland to Idaho Falls on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Portland to Idaho Falls?

momondo provides multiple filters to help you find the best flight to Idaho Falls from Portland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Portland to Idaho Falls right now. Can momondo alert me if prices change?

Price alerts on flights to Idaho Falls from Portland are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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