The calculated distance (air line) between Frýdlant and Česká Lípa is approximately 29 miles respectively 46 kilometers.
By car or train, the actual journey to Česká Lípa is certainly longer, as only the direct route (as the crow flies) between Frýdlant and Česká Lípa has been calculated here.
Air line (approximately)
46 kilometers
25 nautical miles