The calculated distance (air line) between Guastatoya and San Juan Sacatepéquez is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to San Juan Sacatepéquez is certainly longer, as only the direct route (as the crow flies) between Guastatoya and San Juan Sacatepéquez has been calculated here.
Air line (approximately)
64 kilometers
34 nautical miles