Sofia Airport provides free-of-charge transportation between Terminal 1 and Terminal 2 at every 30 minutes between 07:00 and 19:00 local time, with no intermediate stops on the route.

The first bus from Terminal 1 is at 7.00, and from Terminal 2 at 7.15
At 19.15h. is the last bus from Terminal 2.

There is no provision of free-of-charge transportation during the remaining part of the day.

The shuttle bus stops in front of both terminals are indicated with signage and marking on the road pavement.