The calculated distance (air line) between Bīr el Maksūr and Ashdod is approximately 76 miles respectively 122 kilometers.
By car or train, the actual journey to Ashdod is certainly longer, as only the direct route (as the crow flies) between Bīr el Maksūr and Ashdod has been calculated here.
Air line (approximately)
122 kilometers
66 nautical miles