Are there nonstop flights from Changsha (CSX) to Tashkent (TAS)?

No. The fastest connection is via Chongqing, about 6h of total flying time.

What is the fastest connection from Changsha (CSX) to Tashkent (TAS)?

via Chongqing ≈ 6h, via Chengdu ≈ 6h, via Xi'an ≈ 6h 5m (estimated flying time, excluding layovers).

from 18,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Changsha Huanghua International Airport (CSX) to Tashkent International Airport (TAS)・4,219 km

No nonstop flights. The fastest connection is via Chongqing (CKG), about 6h of flying time (layover not included).

With milesANA 18,000 miles+ (via CKG)JAL 23,000 miles+ (via XIY)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

14 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.