The calculated distance (air line) between Stratford-upon-Avon and Barnt Green is approximately 17 miles respectively 28 kilometers.
By car or train, the actual journey to Barnt Green is certainly longer, as only the direct route (as the crow flies) between Stratford-upon-Avon and Barnt Green has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles