The calculated distance (air line) between Rājshāhi and Thākurgaon is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to Thākurgaon is certainly longer, as only the direct route (as the crow flies) between Rājshāhi and Thākurgaon has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles