The calculated distance (air line) between Pfäffikon / Pfäffikon (Dorfkern) and Rapperswil is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Rapperswil is certainly longer, as only the direct route (as the crow flies) between Pfäffikon / Pfäffikon (Dorfkern) and Rapperswil has been calculated here.
Air line (approximately)
16 kilometers
9 nautical miles