The calculated distance (air line) between Schaffhausen and Biel/Bienne is approximately 76 miles respectively 122 kilometers.
By car or train, the actual journey to Biel/Bienne is certainly longer, as only the direct route (as the crow flies) between Schaffhausen and Biel/Bienne has been calculated here.
Air line (approximately)
122 kilometers
66 nautical miles