The calculated distance (air line) between Ajman City and Umm Al Quwain City is approximately 12 miles respectively 20 kilometers.
By car or train, the actual journey to Umm Al Quwain City is certainly longer, as only the direct route (as the crow flies) between Ajman City and Umm Al Quwain City has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles