Are there nonstop flights from Shenzhen (SZX) to Kolkata (CCU)?

No. The fastest connection is via Kunming, about 4h 6m of total flying time.

What is the fastest connection from Shenzhen (SZX) to Kolkata (CCU)?

via Kunming ≈ 4h 6m, via Hanoi ≈ 4h 6m, via Yangon ≈ 4h 30m (estimated flying time, excluding layovers).

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

Shenzhen Bao'an International Airport (SZX) to Netaji Subhash Chandra Bose International Airport (CCU)・2,599 km

No nonstop flights. The fastest connection is via Kunming (KMG), about 4h 6m of flying time (layover not included).

With milesJAL 15,000 miles+ (via KMG)ANA 18,000 miles+ (via BKK)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.