S45 is a line on the Berlin S-Bahn. It operates from Schönefeld Flughafen to Bundesplatz over:
Service on the S45 was suspended on 20 July 2009 and resumed on 24 October 2011.
A southern extension from Schönefeld station, serving the new Berlin Brandenburg International airport, is expected to open in early 2014. It will include two new stops: Waßmannsdorf and Berlin Brandenburg Airport (terminal).