The calculated distance (air line) between Ipswich and Burnham-on-Crouch is approximately 33 miles respectively 53 kilometers.
By car or train, the actual journey to Burnham-on-Crouch is certainly longer, as only the direct route (as the crow flies) between Ipswich and Burnham-on-Crouch has been calculated here.
Air line (approximately)
53 kilometers
29 nautical miles