The calculated distance (air line) between Pfäffikon / Pfäffikon (Dorfkern) and Thun is approximately 69 miles respectively 112 kilometers.
By car or train, the actual journey to Thun is certainly longer, as only the direct route (as the crow flies) between Pfäffikon / Pfäffikon (Dorfkern) and Thun has been calculated here.
Air line (approximately)
112 kilometers
60 nautical miles