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Cheap flights from Portland to Idaho Falls from $68

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

Enter your travel dates to find the best prices.
Allegiant Air Logo
10:01 am - 12:36 pm
PDX
-
IDA
1h 35mnonstop
Allegiant Air Logo
1:26 pm - 2:11 pm
IDA
-
PDX
1h 45mnonstop
$158Allegiant Air
Mon, Dec 29 - Fri, Jan 2
Alaska Airlines Logo
5:35 pm - 6:18 pm
PDX
-
IDA
23h 43m1 stop
Alaska Airlines Logo
6:58 pm - 8:47 pm
IDA
-
PDX
26h 49m1 stop
$275Alaska Airlines
Fri, Jan 23 - Sun, Jan 25
Multiple Airlines Logo
9:26 am - 2:32 pm
PDX
-
IDA
4h 06m1 stop
Multiple Airlines Logo
1:26 pm - 2:11 pm
IDA
-
PDX
1h 45mnonstop
$285Multiple Airlines
Wed, Dec 31 - Fri, Jan 2
Alaska Airlines Logo
5:35 pm - 10:59 pm
PDX
-
IDA
4h 24m1 stop
Alaska Airlines Logo
6:58 pm - 1:30 pm
IDA
-
PDX
19h 32m2 stops
$331Alaska Airlines
Fri, Jan 23 - Sun, Jan 25
Multiple Airlines Logo
9:26 am - 2:06 pm
PDX
-
IDA
3h 40m1 stop
Multiple Airlines Logo
1:26 pm - 2:11 pm
IDA
-
PDX
1h 45mnonstop
$343Multiple Airlines
Tue, Dec 30 - Fri, Jan 2
Multiple Airlines Logo
9:26 am - 2:06 pm
PDX
-
IDA
3h 40m1 stop
Multiple Airlines Logo
1:26 pm - 2:11 pm
IDA
-
PDX
1h 45mnonstop
$347Multiple Airlines
Tue, Dec 30 - Fri, Jan 2
Multiple Airlines Logo
10:45 pm - 12:07 am
PDX
-
IDA
24h 22m2 stops
Multiple Airlines Logo
1:26 pm - 2:11 pm
IDA
-
PDX
1h 45mnonstop
$365Multiple Airlines
Wed, Dec 31 - Fri, Jan 2
Multiple Airlines Logo
10:45 pm - 2:32 pm
PDX
-
IDA
14h 47m2 stops
Multiple Airlines Logo
1:26 pm - 2:11 pm
IDA
-
PDX
1h 45mnonstop
$391Multiple Airlines
Tue, Dec 30 - Fri, Jan 2
Multiple Airlines Logo
10:45 pm - 2:32 pm
PDX
-
IDA
14h 47m2 stops
Multiple Airlines Logo
1:26 pm - 2:11 pm
IDA
-
PDX
1h 45mnonstop
$396Multiple Airlines
Tue, Dec 30 - Fri, Jan 2
Alaska Airlines Logo
7:30 am - 6:18 pm
PDX
-
IDA
9h 48m2 stops
Alaska Airlines Logo
9:00 am - 4:46 pm
IDA
-
PDX
8h 46m2 stops
$413Alaska Airlines
Fri, Jan 23 - Sun, Jan 25

Alaska Airlines flights from Portland to Idaho Falls

Our best Alaska Airlines deals on Portland to Idaho Falls flight tickets
Alaska Airlines
Jan 23
PDX5:35 pmPortland
23h 43m
1 stop
IDA6:18 pmIdaho Falls Fanning Field
Jan 25
IDA6:58 pmIdaho Falls Fanning Field
26h 49m
1 stop
PDX8:47 pmPortland
$275
Find similar
Alaska Airlines
Jan 23
PDX5:35 pmPortland
4h 24m
1 stop
IDA10:59 pmIdaho Falls Fanning Field
Jan 25
IDA6:58 pmIdaho Falls Fanning Field
19h 32m
2 stops
PDX1:30 pmPortland
$331
Find similar
Alaska Airlines
Jan 23
PDX7:30 amPortland
9h 48m
2 stops
IDA6:18 pmIdaho Falls Fanning Field
Jan 25
IDA9:00 amIdaho Falls Fanning Field
8h 46m
2 stops
PDX4:46 pmPortland
$413
Find similar

Delta flights from Portland to Idaho Falls

Our best Delta deals on Portland to Idaho Falls flight tickets
Delta
Dec 30
PDX5:11 pmPortland
4h 41m
1 stop
IDA10:52 pmIdaho Falls Fanning Field
Jan 3
IDA5:55 amIdaho Falls Fanning Field
4h 10m
1 stop
PDX9:05 amPortland
$429
Find similar
Delta
Dec 22
PDX5:11 pmPortland
4h 41m
1 stop
IDA10:52 pmIdaho Falls Fanning Field
Dec 27
IDA5:55 amIdaho Falls Fanning Field
4h 10m
1 stop
PDX9:05 amPortland
$448
Find similar
Delta
Dec 22
PDX5:11 pmPortland
4h 41m
1 stop
IDA10:52 pmIdaho Falls Fanning Field
Dec 26
IDA5:55 amIdaho Falls Fanning Field
4h 13m
1 stop
PDX9:08 amPortland
$518
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 December 14, 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

Mon 12/29

10:01 am-12:36 pm

Nonstop1h 35m

Idaho Falls Fanning Field

Fri 1/2

1:26 pm-2:11 pm

Nonstop1h 45m

$158

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 1/23

5:35 pm-6:18 pm

1 stop23h 43m

Idaho Falls Fanning Field

Sun 1/25

6:58 pm-8:47 pm

1 stop26h 49m

$275

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Wed 12/31

9:26 am-2:32 pm

1 stop4h 06m

Idaho Falls Fanning Field

Fri 1/2

1:26 pm-2:11 pm

Nonstop1h 45m

$285

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 1/23

5:35 pm-10:59 pm

1 stop4h 24m

Idaho Falls Fanning Field

Sun 1/25

6:58 pm-1:30 pm

2 stops19h 32m

$331

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Tue 12/30

9:26 am-2:06 pm

1 stop3h 40m

Idaho Falls Fanning Field

Fri 1/2

1:26 pm-2:11 pm

Nonstop1h 45m

$343

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Tue 12/30

9:26 am-2:06 pm

1 stop3h 40m

Idaho Falls Fanning Field

Fri 1/2

1:26 pm-2:11 pm

Nonstop1h 45m

$347

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Wed 12/31

10:45 pm-12:07 am

2 stops24h 22m

Idaho Falls Fanning Field

Fri 1/2

1:26 pm-2:11 pm

Nonstop1h 45m

$365

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Tue 12/30

10:45 pm-2:32 pm

2 stops14h 47m

Idaho Falls Fanning Field

Fri 1/2

1:26 pm-2:11 pm

Nonstop1h 45m

$391

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Tue 12/30

10:45 pm-2:32 pm

2 stops14h 47m

Idaho Falls Fanning Field

Fri 1/2

1:26 pm-2:11 pm

Nonstop1h 45m

$396

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 1/23

7:30 am-6:18 pm

2 stops9h 48m

Idaho Falls Fanning Field

Sun 1/25

9:00 am-4:46 pm

2 stops8h 46m

$413

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 $128.

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

Our data shows that Saturday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $94. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Wednesday is $221.

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 $91. 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.

Can stopping save me money on Portland to Idaho Falls flights?

No. A direct flight is the cheapest option for a flight between Portland to Idaho Falls.

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

As of December 2025, prices for Portland to Idaho Falls flights are approximately 25% 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

Best Price Found

$73

Fastest flight time

4h 06m

Direct flights

Tue and Sat

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from Portland in the past 72 hours is $73. The best round-trip flight deal from Portland to Idaho Falls found on momondo in the last 72 hours is $92.
The fastest flight from Portland to Idaho Falls takes 4h 06m
Direct flights go from Portland to Idaho Falls on Tuesday and Saturday. The only airline offering direct flights is Allegiant Air.
There is 1 airport in Idaho Falls. From Portland there are direct flights to Idaho Falls Fanning Field (IDA).
Search flight deals

  • 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 4h 06m 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
700 reviews
Search Allegiant Air flights
DeltaPriceFrom $168Free CancellationRating
7.9
8,008 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $184Free CancellationRating
7.8
2,819 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $256Free CancellationRating
8.0
11,452 reviews
Search Alaska Airlines flights

  • Allegiant Air Flights From Portland to Idaho Falls

    Allegiant Air flies from Portland to Idaho Falls around 2 times per week, with 700 momondo users rating the airline 7.2/10. The cheapest Allegiant Air deal from Portland to Idaho Falls in the last 72 hours was $56 (round-trip), much lower than the average airfare cost of $100 for Allegiant Air flights on this route.

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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