Here is an interesting list i've found considering the turnaround charges on some main EU airports. As seen in the chart, and let me add - not surprisingly, LHR seems to be the most expensive and FCO the cheapest major airport in the EU to operate to/from.
Bonus, FCO service charges:
PS: Somebody would know to share with us a website with all worldwide airports fees and charges? Do you have some info on non-EU European airport charges and fuel prices?