Cheap flights from Phoenix to Idaho Falls

One-way fares from $70 · PHX → IDA · prices found by travellers in the last 48 hours

Compare all dates Idaho Falls → Phoenix
Cheapest fare
$70

Allegiant Air · Thu, Nov 12

Cheapest month
November

from $70

Direct flights
Yes

Allegiant Air

Flight time
2h 02m

1,120 km

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Cheapest month to fly from Phoenix to Idaho Falls

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 Cheapest $70

Cheapest dates in November 2026

The lowest fares we've seen for each day, cheapest first.

Allegiant Air
Depart06:10 Thu, Nov 12AZA → IDA 2h 02m · Direct
$70one way, per person
View deal
See every date in November 2026 →

Plan the rest of your trip to Idaho Falls

Where to stay, what to do and getting around, from our travel partners.

Where to stay

Hotels in Idaho FallsCompare places to stay on Booking.com Find hotels →

Things to do

Things to do in Idaho FallsTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in Idaho FallsPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in Idaho FallsCompare rental cars from major brands on EconomyBookings Compare cars →

About flights from Phoenix to Idaho Falls

Phoenix (PHX) and Idaho Falls (IDA) are about 1,120 km apart. Direct flights take around 2h 02m, and recent direct fares were with Allegiant Air. Over the next few months, one-way fares start from $70, and November 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Phoenix to Idaho Falls?

The cheapest one-way fare we've seen recently is $70 with Allegiant Air, departing Thursday, November 12, 2026.

What is the cheapest month to fly from Phoenix to Idaho Falls?

November 2026 currently has the lowest fares, from $70 one way.

Are there direct flights from Phoenix to Idaho Falls?

Yes. Recent direct fares were with Allegiant Air.

How long is the flight from Phoenix to Idaho Falls?

A direct flight takes about 2h 02m. Phoenix and Idaho Falls are around 1,120 km apart.

Which airlines fly from Phoenix to Idaho Falls?

Recent fares on this route were with Allegiant Air.

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