There is no direct motorway between the two, so the road covers 114 km across 70 km of map — 44 km of that is the detour. That is 1h 25 in a car that waits for you rather than the other way round, at a fare quoted in full at booking.
The fare is fixed when you book, so a closed lane or a slow stretch costs you time and not money — there is no meter and no waiting charge. Pickup is any address in Frankfurt: a home, a hotel, an office, a venue. Drop-off is the exact address in Sankt Goar, not the nearest station to it. The route crosses from Hessen into Rheinland-Pfalz; the price covers the whole of it including tolls. The same fixed-price arrangement covers Frankfurt to Marksburg, a separate route with its own measured distance.
One vehicle the whole way, one price, and a departure time you choose rather than one a timetable chooses for you. Journeys this length are mostly booked the same day or the day before, and the car can be at the door within the hour in normal conditions. Arriving by air instead? Frankfurt Airport Transfers covers every destination we serve from the airport.