The calculated distance (air line) between Sint-Genesius-Rode and Dendermonde is approximately 22 miles respectively 36 kilometers.
By car or train, the actual journey to Dendermonde is certainly longer, as only the direct route (as the crow flies) between Sint-Genesius-Rode and Dendermonde has been calculated here.
Air line (approximately)
36 kilometers
20 nautical miles