I am travelling to Frankfurt on a Deutsche Bahn ICE train. I plan to get off at Frankfurt (Main) Hauptbahnhof and take an RMV S-Bahn or RE train to Frankfurt airport. The ICE ticket is a Sparpreis fare, and includes a city ticket.
However, the city ticket in Frankfurt does not cover the airport, and along the Frankfurt Hauptbahnhof - Frankfurt Flughafen Regionalbahnhof route, it appears to be valid up to Frankfurt Stadion.
So, when buying a ticket to the airport, can I buy an RMV single ticket from Frankfurt Stadion to Frankfurt Flughafen Regionalbahnhof and combine it with the city ticket, or do I need to buy a ticket from Frankfurt Hauptbahnhof? The price difference in this case is small, but I am curious to know what the general rules in such cases are.
