The calculated distance (air line) between Andorra la Vella and La Seu d'Urgell is approximately 11 miles respectively 17 kilometers.
By car or train, the actual journey to La Seu d'Urgell is certainly longer, as only the direct route (as the crow flies) between Andorra la Vella and La Seu d'Urgell has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles