The calculated distance (air line) between Markt Indersdorf and Unterföhring is approximately 17 miles respectively 27 kilometers.
By car or train, the actual journey to Unterföhring is certainly longer, as only the direct route (as the crow flies) between Markt Indersdorf and Unterföhring has been calculated here.
Air line (approximately)
27 kilometers
15 nautical miles