Are there nonstop flights from Osaka (KIX) to Nanjing (NKG)?

Yes. Juneyao Air fly this route. Flight time is about 2h 20m.

What is the fastest connection from Osaka (KIX) to Nanjing (NKG)?

via Jeju City ≈ 2h 49m, via Busan ≈ 2h 52m, via Shanghai ≈ 2h 52m (estimated flying time, excluding layovers).

from 11,500 ANA miles, from 12,000 JAL miles (economy, one way, based on the published award charts).

Kansai International Airport (KIX) to Nanjing Lukou International Airport (NKG)・1,553 km

Nonstop flights available (1 airline). Flight time about 2h 20m. Nonstop return flights also operate.

With milesANA 11,500 miles+ (via ICN)JAL 12,000 miles+ (via PVG)Economy, one way, estimate. Tap a connection for miles by cabin.

10 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.