When Ryanair pulled out of Prague wizz air have said prague is a very costly to operate from and if the chargers were reduced they would add more ac and routes.
Also Wizz Air have cut routes from Warsaw from October it is also a very costly to operate out of and the Warsw cuts come weeks after Norwegian air shuffle announced there are to close there base in Augest and only serve two routes from the airport after. Ryanair pulled flights to DUB in 2008 for the same reason. So Warsaw is very costly to operate from.