airroute('Ostend-Bruges International Airport', 'Václav Havel Airport Prague', 2, 'Ostend-Bruges International Airport -> Liège Airport -> Heraklion International Nikos Kazantzakis Airport -> Václav Havel Airport Prague').
airroute('Ostend-Bruges International Airport', 'Václav Havel Airport Prague', 2, 'Ostend-Bruges International Airport -> Liège Airport -> Diagoras Airport -> Václav Havel Airport Prague').
airroute('Ostend-Bruges International Airport', 'Václav Havel Airport Prague', 2, 'Ostend-Bruges International Airport -> Liège Airport -> Palma De Mallorca Airport -> Václav Havel Airport Prague').