The calculated distance (air line) between San Gaspar Tonatico and Iztapalapa is approximately 55 miles respectively 88 kilometers.
By car or train, the actual journey to Iztapalapa is certainly longer, as only the direct route (as the crow flies) between San Gaspar Tonatico and Iztapalapa has been calculated here.
Air line (approximately)
88 kilometers
48 nautical miles