Are there nonstop flights from Rio de Janeiro (SDU) to Porto Alegre (POA)?

No. The fastest connection is via São Paulo, about 2h 25m of total flying time.

What is the fastest connection from Rio de Janeiro (SDU) to Porto Alegre (POA)?

via São Paulo ≈ 2h 25m, via São Paulo ≈ 2h 25m, via Campinas ≈ 2h 31m (estimated flying time, excluding layovers).

Santos Dumont Airport (SDU) to Porto Alegre-Salgado Filho International Airport (POA)・1,120 km

No nonstop flights. The fastest connection is via São Paulo (CGH), about 2h 25m of flying time (layover not included).

None.

5 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.