A lost tourist who thought Maine was San Francisco
Never heard about about that airline, although I flew  from Germany to the US more than once only few years later. I would also have claimed that no way there was a direct flight from Frankfurt to Bangor.However the airline existed and served Frankfurt: https://en.m.wikipedia.org/wiki/World_AirwaysSo probably even the weird connection existed. The Spiegel article from 1977 is online, if you want to read it in German https://www.spiegel.de/spiegel/print/d-40736384.html