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Cheap flights from Portland to Idaho Falls from $74

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 8/17. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
10:30 am - 1:24 pm
PDX
-
IDA
1h 54mnonstop
Alaska Airlines Logo
3:57 pm - 4:50 pm
IDA
-
PDX
1h 53mnonstop
$197Alaska Airlines
Sat, Sep 12 - Sat, Sep 19
Alaska Airlines Logo
10:30 am - 1:24 pm
PDX
-
IDA
1h 54mnonstop
Alaska Airlines Logo
3:57 pm - 4:50 pm
IDA
-
PDX
1h 53mnonstop
$197Alaska Airlines
Fri, Sep 25 - Mon, Sep 28
Delta Logo
5:08 pm - 10:32 pm
PDX
-
IDA
4h 24m
1 stop
Delta Logo
6:00 am - 8:37 am
IDA
-
PDX
3h 37m
1 stop
$207Delta
Thu, Aug 27 - Sun, Aug 30
Delta Logo
5:35 am - 12:22 pm
PDX
-
IDA
5h 47m
1 stop
Delta Logo
6:00 am - 8:50 am
IDA
-
PDX
3h 50m
1 stop
$207Delta
Fri, Oct 16 - Sun, Oct 18
Delta Logo
5:10 pm - 10:22 pm
PDX
-
IDA
4h 12m
1 stop
Delta Logo
6:57 pm - 11:40 pm
IDA
-
PDX
5h 43m
1 stop
$207Delta
Thu, Sep 24 - Tue, Sep 29
Allegiant Air Logo
12:25 pm - 3:05 pm
PDX
-
IDA
1h 40mnonstop
Allegiant Air Logo
3:55 pm - 4:36 pm
IDA
-
PDX
1h 41mnonstop
$221Allegiant Air
Mon, Aug 10 - Fri, Aug 14
Alaska Airlines Logo
10:30 am - 1:21 pm
PDX
-
IDA
1h 51mnonstop
Alaska Airlines Logo
3:57 pm - 4:49 pm
IDA
-
PDX
1h 52mnonstop
$236Alaska Airlines
Thu, Oct 15 - Mon, Oct 19
Allegiant Air Logo
12:25 pm - 3:05 pm
PDX
-
IDA
1h 40mnonstop
Allegiant Air Logo
3:55 pm - 4:36 pm
IDA
-
PDX
1h 41mnonstop
$238Allegiant Air
Mon, Aug 10 - Fri, Aug 14
Multiple Airlines Logo
9:34 pm - 4:00 pm
PDX
-
IDA
17h 26m
1 stop
Multiple Airlines Logo
9:33 pm - 4:35 pm
IDA
-
PDX
20h 02m
2 stops
$298Multiple Airlines
Thu, Oct 15 - Mon, Oct 19
Multiple Airlines Logo
12:25 pm - 3:05 pm
PDX
-
IDA
1h 40mnonstop
Multiple Airlines Logo
3:57 pm - 4:50 pm
IDA
-
PDX
1h 53mnonstop
$303Multiple Airlines
Mon, Aug 17 - Fri, Aug 21

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Alaska Airlines flights from Portland to Idaho Falls

Our best Alaska Airlines deals on Portland to Idaho Falls flight tickets
Alaska Airlines
Sep 12
PDX10:30 amPortland
1h 54m
IDA1:24 pmIdaho Falls Fanning Field
Sep 19
IDA3:57 pmIdaho Falls Fanning Field
1h 53m
PDX4:50 pmPortland
$197
Alaska Airlines
Oct 15
PDX10:30 amPortland
1h 51m
IDA1:21 pmIdaho Falls Fanning Field
Oct 19
IDA3:57 pmIdaho Falls Fanning Field
1h 52m
PDX4:49 pmPortland
$236
Alaska Airlines
Aug 25
PDX10:30 amPortland
1h 54m
IDA1:24 pmIdaho Falls Fanning Field
Sep 1
IDA3:57 pmIdaho Falls Fanning Field
1h 53m
PDX4:50 pmPortland
$237

Delta flights from Portland to Idaho Falls

Our best Delta deals on Portland to Idaho Falls flight tickets
Delta
Aug 27
PDX5:08 pmPortland
4h 24m
1 stop
IDA10:32 pmIdaho Falls Fanning Field
Aug 30
IDA6:00 amIdaho Falls Fanning Field
3h 37m
1 stop
PDX8:37 amPortland
$207
Delta
Aug 27
PDX5:45 amPortland
4h 05m
1 stop
IDA10:50 amIdaho Falls Fanning Field
Aug 30
IDA6:00 amIdaho Falls Fanning Field
5h 42m
2 stops
PDX10:42 amPortland
$212
Delta
Sep 12
PDX5:10 pmPortland
4h 12m
1 stop
IDA10:22 pmIdaho Falls Fanning Field
Sep 19
IDA6:00 amIdaho Falls Fanning Field
3h 41m
1 stop
PDX8:41 amPortland
$258

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 July 30, 2026.
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

Cheapest round-trip

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Sat 9/12

10:30 am-1:24 pm

Nonstop1h 54m

Idaho Falls Fanning Field

Sat 9/19

3:57 pm-4:50 pm

Nonstop1h 53m

$197

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 9/25

10:30 am-1:24 pm

Nonstop1h 54m

Idaho Falls Fanning Field

Mon 9/28

3:57 pm-4:50 pm

Nonstop1h 53m

$197

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Thu 8/27

5:08 pm-10:32 pm

1 stop4h 24m

Idaho Falls Fanning Field

Sun 8/30

6:00 am-8:37 am

1 stop3h 37m

$207

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 10/16

5:35 am-12:22 pm

1 stop5h 47m

Idaho Falls Fanning Field

Sun 10/18

6:00 am-8:50 am

1 stop3h 50m

$207

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Thu 9/24

5:10 pm-10:22 pm

1 stop4h 12m

Idaho Falls Fanning Field

Tue 9/29

6:57 pm-11:40 pm

1 stop5h 43m

$207
Quickest round-trip

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 8/10

12:25 pm-3:05 pm

Nonstop1h 40m

Idaho Falls Fanning Field

Fri 8/14

3:55 pm-4:36 pm

Nonstop1h 41m

$221

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Thu 10/15

10:30 am-1:21 pm

Nonstop1h 51m

Idaho Falls Fanning Field

Mon 10/19

3:57 pm-4:49 pm

Nonstop1h 52m

$236

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 8/10

12:25 pm-3:05 pm

Nonstop1h 40m

Idaho Falls Fanning Field

Fri 8/14

3:55 pm-4:36 pm

Nonstop1h 41m

$238

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Thu 10/15

9:34 pm-4:00 pm

1 stop17h 26m

Idaho Falls Fanning Field

Mon 10/19

9:33 pm-4:35 pm

2 stops20h 02m

$298

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 8/17

12:25 pm-3:05 pm

Nonstop1h 40m

Idaho Falls Fanning Field

Fri 8/21

3:57 pm-4:50 pm

Nonstop1h 53m

$303

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 typical price of a round-trip flight between Portland and Idaho Falls?

Prices are currently low for flights on this route.

Typical prices usually range from $250 to $387.
The lowest price recently found on this route was $197.

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of July, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $150.

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

Our data shows that Friday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $107. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Sunday is $317.

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 in the afternoon. Flights from Portland to Idaho Falls during this time can be as low as $95. Try not to purchase tickets at noon because they tend to be around $238. 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 flights?

There is only 1 cabin class available to choose from on Portland to Idaho Falls 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 July 2026, prices for Portland to Idaho Falls flights are approximately 31% cheaper 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

$93

Fastest flight time

1h 36m

Direct flights

Tue, Wed, Thu, Fri, Sat and Sun

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from Portland in the past 72 hours is $93. The best round-trip flight deal from Portland to Idaho Falls found on momondo in the last 72 hours is $237.
The fastest flight from Portland to Idaho Falls takes 1h 36m
Direct flights go from Portland to Idaho Falls on Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport in Idaho Falls. From Portland there are direct flights to Idaho Falls Fanning Field (IDA).
Search flight deals

Frequently asked questions about flying from Portland to Idaho Falls

  • 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 1h 36m 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 $68Free CancellationRating
7.3
678 reviews
Search Allegiant Air flights
DeltaPriceFrom $168Free CancellationRating
7.8
8,488 reviews
Search Delta flights
Alaska AirlinesPriceFrom $193Free CancellationRating
7.9
12,736 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Portland to Idaho Falls

    Alaska Airlines flies from Portland to Idaho Falls around 7 times per week, with 12,736 momondo users rating the airline 7.9/10. The cheapest Alaska Airlines deal from Portland to Idaho Falls in the last 72 hours was $193 (round-trip), much lower than the average airfare cost of $426 for Alaska Airlines 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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