The calculated distance (air line) between Sandown and Lee-on-the-Solent is approximately 11 miles respectively 17 kilometers.
By car or train, the actual journey to Lee-on-the-Solent is certainly longer, as only the direct route (as the crow flies) between Sandown and Lee-on-the-Solent has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles