The calculated distance (air line) between Cardona and La Seu d'Urgell is approximately 33 miles respectively 53 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 Cardona and La Seu d'Urgell has been calculated here.
Air line (approximately)
53 kilometers
28 nautical miles