The calculated distance (air line) between Mayāng Imphāl and Dimāpur is approximately 91 miles respectively 146 kilometers.
By car or train, the actual journey to Dimāpur is certainly longer, as only the direct route (as the crow flies) between Mayāng Imphāl and Dimāpur has been calculated here.
Air line (approximately)
146 kilometers
79 nautical miles