Originally Posted by Rajah
hmmm:
Frankfurt, Delhi, Mumbai...
and then there is Copenhagen, which had CPH and MMX for a while according to Ryanair (despite the fact that Malmo is actually in a different country...)
I can't count Frankfurt: FRA, sure, but HHN is over an hour of empty countryside from Frankfurt city center. It's closer to K'lautern, Saarbruecken, Mainz, Koblenz, Bonn, and Luxembourg than it is to the city whose name it bears. Unless there's another one I didn't know about, or you're counting the US military airfields, Frankfurt has one airport.