Are there nonstop flights from Sendai (SDJ) to Shenzhen (SZX)?

No. The fastest connection is via Osaka, about 4h 40m of total flying time.

What is the fastest connection from Sendai (SDJ) to Shenzhen (SZX)?

via Osaka ≈ 4h 40m, via Shanghai ≈ 4h 42m, via Taipei ≈ 4h 43m (estimated flying time, excluding layovers).

from 11,500 ANA miles (economy, one way, based on the published award charts).

Sendai Airport (SDJ) to Shenzhen Bao'an International Airport (SZX)・3,101 km

No nonstop flights. The fastest connection is via Osaka (KIX), about 4h 40m of flying time (layover not included).

With milesANA 11,500 miles+ (via PVG)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.