The calculated distance (air line) between Porto Alegre and São Sebastião do Caí is approximately 32 miles respectively 52 kilometers.
By car or train, the actual journey to São Sebastião do Caí is certainly longer, as only the direct route (as the crow flies) between Porto Alegre and São Sebastião do Caí has been calculated here.
Air line (approximately)
52 kilometers
28 nautical miles