Could you give me a few examples? A DDG search is proving hopelessly inadequate. It only finds information about new/remodeled terminals, and the proposed Centr

Could you give me a few examples? A DDG search is proving hopelessly inadequate. It only finds information about new/remodeled terminals, and the proposed Central Communication Port in Poland, which is greenfield (literally) but hasn't started yet. https://en.wikipedia.org/wiki/List_of_airports_in_Germany https://en.wikipedia.org/wiki/List_of_airports_in_Germany helpfully lists airfields in Germany which don't have regularly scheduled commercial passenger service. The first I picked was Kiel Airport, https://en.wikipedia.org/wiki/Kiel_Airport https://en.wikipedia.org/wiki/Kiel_Airport , which fits my description of how airports don't benefit from a simple network effect. It had "27 national and international destinations" back around 1930, then was mixed military and civilian. The first terminal was built in 1965. In 1987, "Lufthansa began offering scheduled flights to Frankfurt, and later to Cologne/Bonn, Munich, Copenhagen, Kaliningrad and Riga." The last commercial scheduled passenger flight was in 2006. I'm curious if any of the military airports you mention once had passenger service, reflecting how airports used to be more common as technical limitations prevented them from carrying many passengers or going all that far.