Are there nonstop flights from Changsha (CSX) to Islamabad (ISB)?

No. The fastest connection is via Kashgar, about 6h 7m of total flying time.

What is the fastest connection from Changsha (CSX) to Islamabad (ISB)?

via Kashgar ≈ 6h 7m, via Ürümqi ≈ 6h 24m, via Guangzhou ≈ 6h 26m (estimated flying time, excluding layovers).

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

Changsha Huanghua International Airport (CSX) to Islamabad International Airport (ISB)・3,877 km

No nonstop flights. The fastest connection is via Kashgar (KHG), about 6h 7m of flying time (layover not included).

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

None.

6 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.