The calculated distance (air line) between Mers El Kheir and Khouribga is approximately 68 miles respectively 109 kilometers.
By car or train, the actual journey to Khouribga is certainly longer, as only the direct route (as the crow flies) between Mers El Kheir and Khouribga has been calculated here.
Air line (approximately)
109 kilometers
59 nautical miles