The calculated distance (air line) between Gursahāiganj and Farrukhābād is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Farrukhābād is certainly longer, as only the direct route (as the crow flies) between Gursahāiganj and Farrukhābād has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles