As of March 2007 the following are the direct flights from Ireland to Berlin:

Aer Lingus : Cork (ORK) - Berlin (SXF)
Aer Lingus : Dublin (DUB) - Berlin (SXF)
Lufthansa : Dublin (DUB) - Berlin (TXL)
Ryanair : Dublin (DUB) - Berlin (SXF)
Ryanair : Shannon (SNN) - Berlin (SXF)