Cheap flights from Las Vegas to Idaho from $42

In general, December is the cheapest month to fly from Las Vegas to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $188. If you don’t want to visit Idaho in December, then you should wait until August to fly from Las Vegas, when ticket prices are also cheap, with an average price of $193.

Our data shows that Friday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $205. On the other hand, Monday is the most expensive day to depart from Las Vegas because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $376.

According to our data, the cheapest time of day to fly to Idaho is in the afternoon. momondo users have found flights departing from Las Vegas to Idaho in the afternoon for as low as $242. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the evening is when there is more demand to fly to Idaho, so prices are often more expensive at around $286 per ticket.

Fly from Las Vegas Harry Reid Intl to Idaho Falls Fanning Field for the best Las Vegas Harry Reid Intl - Idaho flight prices

You are more likely to see cheaper flights to Idaho from Las Vegas when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $256 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Las Vegas for as low as $138 on momondo.

There are 2 cabin classes available to choose from on Las Vegas to Idaho flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Allegiant Air, Southwest, and Delta are the most popular carriers operating from Las Vegas Harry Reid Intl to Idaho

Southwest, Alaska Airlines and Allegiant Air are the top three most popular airlines that fly to Idaho from Las Vegas according to our data. Southwest is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 5 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

As of November 2026, there are 2 flights per day flying from Las Vegas to Idaho. The most common time of day flights depart is 9:00AM, with 44% of flights taking off at noon.

As of November 2026, there are 16 flights per week flying from Las Vegas to Idaho. The most common day of the week flights depart is Mon, with 44% of flights taking off on this day.