Cheap flights from San Francisco to Idaho from $70

In general, August is the cheapest month to fly from San Francisco to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $44. If you don’t want to visit Idaho in August, then you should wait until March to fly from San Francisco, when ticket prices are also cheap, with an average price of $78.

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 $236. On the other hand, Monday is the most expensive day to depart from San Francisco because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $387.

According to our data, the cheapest time of day to fly to Idaho is in the morning. momondo users have found flights departing from San Francisco to Idaho in the morning for as low as $292. 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 $326 per ticket.

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

You are more likely to see cheaper flights to Idaho from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $290 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from San Francisco for as low as $200 on momondo.

There are 4 cabin classes available to choose from on San Francisco to Idaho flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

United Airlines, Alaska Airlines and Southwest are the top three most popular airlines that fly to Idaho from San Francisco according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 6 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

29 flights are operational daily from San Francisco to Idaho as of June 2026. The most popular departure time for this route is 6:00PM, with 69% of flights per day taking off in the evening.

The number of flights available between San Francisco and Idaho is 209 per week as of June 2026. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.