The calculated distance (air line) between East Wittering and Lee-on-the-Solent is approximately 14 miles respectively 23 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 East Wittering and Lee-on-the-Solent has been calculated here.
Air line (approximately)
23 kilometers
13 nautical miles