sure, that's why I mentioned "<600km", which is a distance covering many connections in Europe. E.g. Paris-Milan, Amsterdam-Berlin, Budapest-Vienna, London-Brus

sure, that's why I mentioned "<600km", which is a distance covering many connections in Europe. E.g. Paris-Milan, Amsterdam-Berlin, Budapest-Vienna, London-Brussels, Geneve-Genoa etc These would be * many hours by car * <3 hours by fast train * <1 hour in flight by plane The flight time is offset by security controls and getting to/from the airport, so a fast train is a good alternative (not perfect, just good).