Cheap flights from Las Vegas to Idaho from $43

In general, August 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 $34. If you don’t want to visit Idaho in August, then you should wait until March to fly from Las Vegas, when ticket prices are also cheap, with an average price of $50.

Our data shows that Wednesday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $212. On the other hand, Tuesday 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 $362.

According to our data, the cheapest time of day to fly to Idaho is in the evening. momondo users have found flights departing from Las Vegas to Idaho in the evening for as low as $189. 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 afternoon is when there is more demand to fly to Idaho, so prices are often more expensive at around $329 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 $220 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 $120 on momondo.

There are 4 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, Frontier, and Southwest 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 44% 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 June 2026, there are 5 flights per day flying from Las Vegas to Idaho. The most common time of day flights depart is 5:00PM, with 42% of flights taking off in the evening.

As of June 2026, there are 36 flights per week flying from Las Vegas to Idaho. The most common day of the week flights depart is Sun, with 22% of flights taking off on this day.