EI-BUD
Lufthansa group has a tiny operation at BER. Lufthansa proper only serves its hubs at MUC and FRA, Euowings is focused on three domestic routes, PMI and some ethnic routes. This despite Berlin's status as the nation's capital and Eurowings operating sizeable bases at DUS, STR, CGN etc. So I'd say SOU will happen when hell freezes over...