The calculated distance (air line) between Uetendorf and Biel/Bienne is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Biel/Bienne is certainly longer, as only the direct route (as the crow flies) between Uetendorf and Biel/Bienne has been calculated here.
Air line (approximately)
47 kilometers
26 nautical miles