The calculated distance (air line) between Wijk bij Duurstede and Nijmegen is approximately 24 miles respectively 38 kilometers.
By car or train, the actual journey to Nijmegen is certainly longer, as only the direct route (as the crow flies) between Wijk bij Duurstede and Nijmegen has been calculated here.
Air line (approximately)
38 kilometers
21 nautical miles