Lowest Priced Flights to Idaho Falls on Allegiant starting at $50*

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*Modifying this information may result in a different fare

Best flights to Idaho Falls (IDA)

$

Phoenix / Mesa (AZA)to

Idaho Falls (IDA)
Departing: August 10 2026
From
$56
Seen: 2 hrs ago
One-way
Economy

Santa Ana / Orange County (SNA)to

Idaho Falls (IDA)
Departing: August 14 2026
From
$56
Seen: 1 day ago
One-way
Economy

Portland (PDX)to

Idaho Falls (IDA)
Departing: August 17 2026
From
$50
Seen: 17 hrs ago
One-way
Economy

Las Vegas (LAS)to

Idaho Falls (IDA)
Departing: August 7 2026
From
$55
Seen: 5 hrs ago
One-way
Economy
*Fares displayed have been collected within the last 48hrs and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply.

Cheap flights to Idaho Falls

$
Cheap flights to Idaho Falls
From
To
Fare Type
Dates
Price
Phoenix / Mesa (AZA)Idaho Falls (IDA)One-way
/
Economy		Departing: August 10 2026

From

$56

Seen: 2 hrs ago

Santa Ana / Orange County (SNA)Idaho Falls (IDA)One-way
/
Economy		Departing: August 14 2026

From

$56

Seen: 1 day ago

Portland (PDX)Idaho Falls (IDA)One-way
/
Economy		Departing: August 17 2026

From

$50

Seen: 17 hrs ago

Las Vegas (LAS)Idaho Falls (IDA)One-way
/
Economy		Departing: August 7 2026

From

$55

Seen: 5 hrs ago

*Fares displayed have been collected within the last 48hrs and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply.

Travel Tips

Bundles are packages of popular services with an added discount.

Select a bundle to:

  • Streamline the booking experience

  • Save time

  • Save money!

  • Click here for more information.

Allegiant proudly supports our military and our military veterans by offering select free benefits through the Allegiant Honors program.

  • Benefits include free checked bag, carry on, etc. Click here to learn more.

Lock in the lowest price by adding your checked and carryon bags when you book your flight.

  • By charging for carry-ons, we ensure there is space for everyone who needs it.

  • This leads to speedier boarding. Click here to see your bag options.

Cheap flights to Idaho Falls, ID (IDA) with Allegiant Airlines

Travel to Idaho Falls

Idaho Falls is excited for your arrival. Whether you seek endless activities or plan to do some sight seeing, Allegiant Airlines can get you there. With nonstop flights and low airfare, we're here to help make your trip memorable.

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