Are there nonstop flights from Hangzhou (HGH) to Tumxuk (TWC)?

Yes. Loong Air fly this route. Flight time is about 5h 3m.

What is the fastest connection from Hangzhou (HGH) to Tumxuk (TWC)?

via Xi'an ≈ 5h 33m, via Aral ≈ 5h 34m, via Zhengzhou ≈ 5h 34m (estimated flying time, excluding layovers).

from 10,000 ANA miles (economy, one way, based on the published award charts).

Hangzhou Xiaoshan International Airport (HGH) to Tumxuk Tangwangcheng Airport (TWC)・3,863 km

Nonstop flights available (1 airline). Flight time about 5h 3m. Nonstop return flights also operate.

With milesANA 10,000 miles+ (via PEK)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.