Opposition politicians in the Berlin assembly were quick to criticise Wowereit for not informing them of the latest postponement, despite apparently having been already aware of it in December.
The parliamentary leader of the Greens, Antje Kapek, called for a special meeting of the Berlin assembly this week, for Wowereit to explain himself.
The spokesmen for both Wowereit and the airport operator were not available for immediate comment.
(Reporting By Holger Hansen; Writing by Sarah Marsh)