From Stockholm Skavsta airport fly to Sofia airport then train to Sofia. 7hrs 54min $162. From Stockholm Skavsta airport fly to Thessaloniki airport, line 78 bus to Thessaloniki, then bus to Sofia. 12hrs 03min $191. From Skavsta flygplats bus to Linköping Fjärrbussterminal, bus to Jönköping, bus to Niš, then bus to Sofia. 46hrs 28min $270. From Skavsta flygplats line 515 bus to Nyköping, bus to Ljubljana, then bus to Sofia. 45hrs 51min $324. From Stockholm Skavsta drive to Sofia. 30hrs 58min $600.