Cheap flights from San Diego to Idaho from $69

In general, May is the cheapest month to fly from San Diego to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $68. If you don’t want to visit Idaho in May, then you should wait until January to fly from San Diego, when ticket prices are also cheap, with an average price of $93.

Our data shows that Saturday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $247. On the other hand, Monday is the most expensive day to depart from San Diego because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $347.

According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from San Diego to Idaho at noon for as low as $227. 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 morning is when there is more demand to fly to Idaho, so prices are often more expensive at around $312 per ticket.

Fly from San Diego to Boise Air Term. Gowen Fld for the best San Diego - Idaho flight prices

You are more likely to see cheaper flights to Idaho from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $280 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from San Diego for as low as $216 on momondo.

Delta, Alaska Airlines, and Southwest are the most popular carriers operating from San Diego to Idaho

Alaska Airlines, Allegiant Air and Southwest are the top three most popular airlines that fly to Idaho from San Diego according to our data. Alaska Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 7 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

As of May 2026, 4 flights take off from San Diego and land in Idaho each day. The most common flight departure time for this route is 9:00AM, with 42% of daily flights taking off in the evening.

34 flights are operational weekly from San Diego to Idaho as of May 2026. The most popular departure day for this route is Fri, with 29% of flights per week taking off on this day.