The calculated distance (air line) between Gaziantep and Dayr Ḩāfir is approximately 65 miles respectively 104 kilometers.
By car or train, the actual journey to Dayr Ḩāfir is certainly longer, as only the direct route (as the crow flies) between Gaziantep and Dayr Ḩāfir has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles