The European champions suffered their first qualification defeat in 37 matches against Slovakia last week, but they are still expected to qualify for the competition in France.
Del Bosque has been in charge of the national team since 2008, leading the country to a European Championship and a World Cup. However, the 63-year-old is planning to leave his post in 2016.
"Sure. I think so. Let's get to France and then we'll see. In theory that will be my final challenge ," he told Radiogaceta de los Deportes.
Del Bosque has also previously managed Real Madrid.