Cheap flights from Idaho Falls from $61

Our data suggests that currently, the cheapest flights from Idaho Falls are being offered by Alaska Airlines, Delta, and Allegiant Air. For example, Alaska Airlines flights from Idaho Falls to Portland, start at $51, Delta flights from Idaho Falls to Denver cost around $54, and Allegiant Air flights from Idaho Falls to Phoenix-Mesa Gateway Airport are around $108.

Currently, the cheapest flight from Idaho Falls found by our users is for $54 to Las Vegas. Prices will vary according to several factors such as the departure date and time, but on average you can expect to pay around $166 to travel from Idaho Falls to Las Vegas.

Salt Lake City, Denver and Seattle are currently the destinations served most frequently from Idaho Falls, with 7, 4 and 4 flights per day on average, respectively.

Airlines including American Airlines, United Airlines and Delta frequently fly from Idaho Falls. You can view other airlines by performing a quick search in the form above.

If you are looking for a cheap first class flight, consider flights to Dallas/Fort Worth Airport, for which the starting price of a first class seat can be as low as $742.

Prices for flights from Idaho Falls Fanning Field Airport refresh daily.

The number of operators available for flights from Idaho Falls Fanning Field Airport is 7 as of November 2025.

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho Falls Fanning Field Airport.

The required travel and health documents for your Idaho Falls Fanning Field Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.