Cheap flights from Seattle to Idaho from $89

In general, January is the cheapest month to fly from Seattle to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $99. If you don’t want to visit Idaho in January, then you should wait until April to fly from Seattle, when ticket prices are also cheap, with an average price of $177.

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 $197. On the other hand, Sunday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $317.

According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from Seattle to Idaho at noon for as low as $199. 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 $216 per ticket.

Fly from Seattle/Tacoma Intl to Boise Air Term. Gowen Fld for the best Seattle/Tacoma Intl - Idaho flight prices

You are more likely to see cheaper flights to Idaho from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $198 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Seattle for as low as $164 on momondo.

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl 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 United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Idaho

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to Idaho from Seattle according to our data. Alaska Airlines is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 3 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

The number of flights available between Seattle and Idaho is 89 per day as of April 2026. The most frequent departure time is 8:00PM, with 36% of daily flights leaving in the evening.

As of April 2026, 629 flights take off from Seattle and land in Idaho each week. The most common flight departure day for this route is Mon, with 16% of weekly flights taking off on this day.