The calculated distance (air line) between Białystok and Ostrowiec Świętokrzyski is approximately 170 miles respectively 274 kilometers.
By car or train, the actual journey to Ostrowiec Świętokrzyski is certainly longer, as only the direct route (as the crow flies) between Białystok and Ostrowiec Świętokrzyski has been calculated here.
Air line (approximately)
274 kilometers
148 nautical miles