Are there nonstop flights from Nanjing (NKG) to Hanoi (HAN)?

Yes. Xiamen Airlines fly this route. Flight time is about 2h 33m.

What is the fastest connection from Nanjing (NKG) to Hanoi (HAN)?

via Guilin ≈ 3h 3m, via Nanning ≈ 3h 3m, via Zhangjiajie ≈ 3h 11m (estimated flying time, excluding layovers).

from 15,000 JAL miles, from 18,000 ANA miles (economy, one way, based on the published award charts).

Nanjing Lukou International Airport (NKG) to Noi Bai International Airport (HAN)・1,745 km

Nonstop flights available (1 airline). Flight time about 2h 33m. Nonstop return flights also operate.

With milesJAL 15,000 miles+ (via HKG)ANA 18,000 miles+ (via CAN)Economy, one way, estimate. Tap a connection for miles by cabin.

27 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.