Aer Lingus (EI, Dublin International) will launch twice weekly A320-200 service from Dublin to Poznan on April 1. It will also base an additional A320-200 in Cork from the end of June to launch three times weekly services to Berlin Schönefeld and Birmingham and a weekly flight to Tenerife Sur. Aer Lingus will however give up its Cork-Munich route by the end of March.