Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Portland to Idaho Falls from $84

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Idaho Falls departing on 8/4. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Portland to Idaho Falls

Cheap round-trip flights

Allegiant Air Logo
1:38 pm - 4:14 pmPDX-IDA
1h 36mnonstop
Allegiant Air Logo
5:04 pm - 5:41 pmIDA-PDX
1h 37mnonstop
$84Allegiant Air
Find Deal
Mon, Aug 4 - Mon, Aug 11
Allegiant Air Logo
1:54 pm - 4:32 pmPDX-IDA
1h 38mnonstop
Allegiant Air Logo
3:26 pm - 4:11 pmIDA-PDX
1h 45mnonstop
$90Allegiant Air
Find Deal
Fri, Nov 21 - Mon, Dec 8
Logo
1:38 pm - 4:14 pmPDX-IDA
1h 36mnonstop
Logo
7:23 pm - 2:15 pmIDA-PDX
19h 52m2 stops
$174
Find Deal
Mon, Aug 4 - Mon, Aug 11
Logo
1:38 pm - 4:14 pmPDX-IDA
1h 36mnonstop
Logo
7:23 pm - 2:15 pmIDA-PDX
19h 52m2 stops
$212
Find Deal
Fri, Aug 8 - Mon, Aug 11
Alaska Airlines Logo
3:40 pm - 10:39 pmPDX-IDA
5h 59m1 stop
Alaska Airlines Logo
3:57 pm - 6:17 amIDA-PDX
15h 20m1 stop
$302Alaska Airlines
Find Deal
Sat, Sep 6 - Mon, Sep 8
Alaska Airlines Logo
5:47 pm - 10:39 pmPDX-IDA
3h 52m1 stop
Alaska Airlines Logo
6:13 am - 10:57 amIDA-PDX
5h 44m1 stop
$313Alaska Airlines
Find Deal
Sat, Aug 23 - Wed, Aug 27
Hawaiian Airlines Logo
3:40 pm - 10:39 pmPDX-IDA
5h 59m1 stop
Hawaiian Airlines Logo
3:57 pm - 8:25 pmIDA-PDX
5h 28m1 stop
$320Hawaiian Airlines
Find Deal
Sat, Sep 6 - Mon, Sep 8
Delta Logo
5:35 am - 10:39 amPDX-IDA
4h 04m1 stop
Delta Logo
11:20 am - 4:10 pmIDA-PDX
5h 50m1 stop
$325Delta
Find Deal
Sat, Aug 16 - Tue, Aug 19
Delta Logo
5:35 am - 10:39 amPDX-IDA
4h 04m1 stop
Delta Logo
6:52 pm - 11:52 pmIDA-PDX
6h 00m2 stops
$329Delta
Find Deal
Sat, Aug 23 - Wed, Aug 27
Hawaiian Airlines Logo
5:35 pm - 10:39 pmPDX-IDA
4h 04m1 stop
Hawaiian Airlines Logo
3:54 pm - 8:25 pmIDA-PDX
5h 31m1 stop
$357Hawaiian Airlines
Find Deal
Tue, Aug 19 - Thu, Aug 28

Allegiant Air flights from Portland to Idaho Falls

Our best Allegiant Air deals on Portland to Idaho Falls flight tickets
Allegiant Air
Aug 4
PDX1:38 pmPortland
1h 36m
IDA4:14 pmIdaho Falls Fanning Field
Aug 11
IDA5:04 pmIdaho Falls Fanning Field
1h 37m
PDX5:41 pmPortland
$84
Find similar
Allegiant Air
Nov 21
PDX1:54 pmPortland
1h 38m
IDA4:32 pmIdaho Falls Fanning Field
Dec 8
IDA3:26 pmIdaho Falls Fanning Field
1h 45m
PDX4:11 pmPortland
$90
Find similar
Allegiant Air
Aug 8
PDX1:38 pmPortland
1h 36m
IDA4:14 pmIdaho Falls Fanning Field
Aug 11
IDA5:04 pmIdaho Falls Fanning Field
1h 37m
PDX5:41 pmPortland
$118
Find similar

Alaska Airlines flights from Portland to Idaho Falls

Our best Alaska Airlines deals on Portland to Idaho Falls flight tickets
Alaska Airlines
Sep 6
PDX3:40 pmPortland
5h 59m
1 stop
IDA10:39 pmIdaho Falls Fanning Field
Sep 8
IDA3:57 pmIdaho Falls Fanning Field
15h 20m
1 stop
PDX6:17 amPortland
$302
Find similar
Alaska Airlines
Aug 23
PDX5:47 pmPortland
3h 52m
1 stop
IDA10:39 pmIdaho Falls Fanning Field
Aug 27
IDA6:13 amIdaho Falls Fanning Field
5h 44m
1 stop
PDX10:57 amPortland
$313
Find similar
Alaska Airlines
Oct 17
PDX8:50 pmPortland
17h 48m
1 stop
IDA3:38 pmIdaho Falls Fanning Field
Oct 20
IDA6:00 amIdaho Falls Fanning Field
25h 20m
1 stop
PDX6:20 amPortland
$323
Find similar

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?

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 Wednesday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Wednesday is $304.

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

How far in advance should I book a flight to Idaho Falls?

You are more likely to see cheaper flights to Idaho Falls from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho Falls for around $244 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho Falls from Portland for as low as $95 on momondo.

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

There are 1 cabin classes 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 July 2025, prices for Portland to Idaho Falls flights are approximately 2% 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

$179

Fastest flight time

1h 36m

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 $179. The best round-trip flight deal from Portland to Idaho Falls found on momondo in the last 72 hours is $84.
The fastest flight from Portland to Idaho Falls takes 1h 36m
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 near Idaho Falls: 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 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
7.2
705 reviews
Search Allegiant Air flights
DeltaPriceFrom $171Free CancellationRating
8.0
7,957 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $178Free CancellationRating
7.8
2,578 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $290Free CancellationRating
8.0
10,000 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 705 momondo users rating the airline 7.2/10. The cheapest Allegiant Air deal from Portland to Idaho Falls in the last 72 hours was $68 (round-trip), much lower than the average airfare cost of $109 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.

An easier way to manage your Idaho Falls trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 7/21
Mon 7/28
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States