Airlines Europe: Flugverbot – a free expansion distributed at Spiel 2011 – provides players a blocking variant for Alan R. Moon's 2011 release Airlines Europe that, in the words of Abacusspiele's Matthias Wagner, "should make the board/routes slightly tighter".
Airlines Europe: Flugverbot introduces a revised version of the sabotage rules present in Moon's 1990 release Airlines in which players can block locations on possible airline routes. ("Flugverbot" = "flight ban")
Summary of Airlines Europe: Flugverbot by Alan R. Moon copyright 2011 by ABACUSSPIELE.
Adds Flight Ban markers placed after scoring rounds to add strategy to board by making route placements tighter.
The summary has a typo: with 2 players it should be 4 markers.