The calculated distance (air line) between Balaruc-les-Bains and Mauguio is approximately 20 miles respectively 33 kilometers.
By car or train, the actual journey to Mauguio is certainly longer, as only the direct route (as the crow flies) between Balaruc-les-Bains and Mauguio has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles