Berlin's airport set up is a result of its post-war history. Germany was divided into four sectors and Berlin (wholly within the East German sector) was also divided between the British, americans, french and Russians. As a result each of the four sectors in Berlin had an airport.
I'll cut a long story short to say that ultimately TXL
became the main airport for berlin over THF
, and SXF
became the airport for East Berlin.
Upon reunification of course the airports were still there - with TXL
mainly served by the likes of AF
and all the other traditional western carriers (and LH
who originally weren't allowed to fly there), THF
generally saw the smaller business and commuter flights, while SXF
saw all the carriers from the former Eastern bloc such as SU
and so on.
This has changed somewhat in time as new services have arrived to the city. Carriers have chosen to operate to the different airports for various reasons, but by and large TXL
mainly sees the traditional full service carriers (with its better proximity to the business centres of West Berlin), SXF
still gets the smaller airport, while SXF
has grown from much more LCC and charter traffic.
This will all become academic of course once the new BBI airport is built on the site of SXF
and the other airports are eventually closed.
Just when I thought I could see light at the end of the tunnel, it was some B*****d with a torch bringing me more work