The calculated distance (air line) between Dortmund and Wijk bij Duurstede is approximately 96 miles respectively 155 kilometers.
By car or train, the actual journey to Wijk bij Duurstede is certainly longer, as only the direct route (as the crow flies) between Dortmund and Wijk bij Duurstede has been calculated here.
Air line (approximately)
155 kilometers
84 nautical miles