Cheap flights from Washington to Idaho from $106

In general, January is the cheapest month to fly from State of Washington to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $194. If you don’t want to visit Idaho in January, then you should wait until April to fly from State of Washington, when ticket prices are also cheap, with an average price of $202.

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 $215. On the other hand, Sunday is the most expensive day to depart from State of Washington 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 in the afternoon. momondo users have found flights departing from State of Washington to Idaho in the afternoon for as low as $219. 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 $266 per ticket.

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

You are more likely to see cheaper flights to Idaho from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $234 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from State of Washington for as low as $140 on momondo.

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

43 flights are operational daily from State of Washington to Idaho as of September 2026. The most popular departure time for this route is 9:00PM, with 43% of flights per day taking off in the evening.

As of September 2026, 301 flights take off from State of Washington and land in Idaho each week. The most common flight departure day for this route is Thu, with 20% of weekly flights taking off on this day.