Are there nonstop flights from Changsha (CSX) to Nanjing (NKG)?

No. The fastest connection is via Shanghai, about 2h 23m of total flying time.

What is the fastest connection from Changsha (CSX) to Nanjing (NKG)?

via Shanghai ≈ 2h 23m, via Fuzhou ≈ 2h 34m, via Quanzhou ≈ 2h 40m (estimated flying time, excluding layovers).

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

Changsha Huanghua International Airport (CSX) to Nanjing Lukou International Airport (NKG)・672 km

No nonstop flights. The fastest connection is via Shanghai (PVG), about 2h 23m of flying time (layover not included).

With milesJAL 12,000 miles+ (via FOC)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

11 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.