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