Leaving on a Saturday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 17% on the overall cost on flights from Boise to Bilbao.
November can be a great time to fly to Bilbao from Boise with a flight ticket averaging about $1005. Cheapflights users have found deals in the month of November for as cheap as $734. The most expensive prices can be found in the month of June.