The calculated distance (air line) between Lucknow and Fatehpur Chaurāsi is approximately 41 miles respectively 66 kilometers.
By car or train, the actual journey to Fatehpur Chaurāsi is certainly longer, as only the direct route (as the crow flies) between Lucknow and Fatehpur Chaurāsi has been calculated here.
Air line (approximately)
66 kilometers
35 nautical miles