The calculated distance (air line) between Sderot and Umm el Faḥm is approximately 76 miles respectively 122 kilometers.
By car or train, the actual journey to Umm el Faḥm is certainly longer, as only the direct route (as the crow flies) between Sderot and Umm el Faḥm has been calculated here.
Air line (approximately)
122 kilometers
66 nautical miles