Getting to Bansko by bus is straightforward, with a mix of year-round and seasonal options depending on when you're travelling.
For regular travel, companies like Union Ivkoni and Popov run scheduled coaches between Sofia and Bansko throughout the year, with several departures a day and connections on to nearby towns like Blagoevgrad and Razlog. These run to a fixed timetable regardless of season.
Traventuria takes a different approach, running periodic shuttles rather than a year-round line - most active in winter, when they time departures around flight arrivals and departures at Sofia Airport. These are aimed squarely at skiers flying in and out, with pickups and drop-offs coordinated to match flight schedules rather than running on a fixed daily route.
Because service can change from one season to the next, it's worth checking current timetables before you travel rather than assuming last year's schedule still holds.