LH relies on Private Air for two flights ex DUS ( EWR and ORD ) and one ex MUC, in addition to that Swiss used Private Air metal on one TATL flight as well.

However it is only working between key markets ( DUS has the third biggest catchment area in Europe, after LHR and CDG ) so it will not become an every day scenario.IAH is certainly a key market for KLM and Royal Dutch Shell, in addition to that AMS has always been a key hub for transfers into the Far East regions...