The calculated distance (air line) between Onitsha and Ijebu-Jesa is approximately 172 miles respectively 276 kilometers.
By car or train, the actual journey to Ijebu-Jesa is certainly longer, as only the direct route (as the crow flies) between Onitsha and Ijebu-Jesa has been calculated here.
Air line (approximately)
276 kilometers
149 nautical miles