The calculated distance (air line) between Khomeynī Shahr and Varāmīn is approximately 182 miles respectively 294 kilometers.
By car or train, the actual journey to Varāmīn is certainly longer, as only the direct route (as the crow flies) between Khomeynī Shahr and Varāmīn has been calculated here.
Air line (approximately)
294 kilometers
158 nautical miles