The calculated distance (air line) between Mayāng Imphāl and Āmbāsa is approximately 136 miles respectively 219 kilometers.
By car or train, the actual journey to Āmbāsa is certainly longer, as only the direct route (as the crow flies) between Mayāng Imphāl and Āmbāsa has been calculated here.
Air line (approximately)
219 kilometers
118 nautical miles