Are there nonstop flights from Shenzhen (SZX) to Yanji (YNJ)?

Yes. China Southern Airlines fly this route. Flight time is about 3h 39m.

What is the fastest connection from Shenzhen (SZX) to Yanji (YNJ)?

via Nanjing ≈ 4h 9m, via Hangzhou ≈ 4h 10m, via Shanghai ≈ 4h 10m (estimated flying time, excluding layovers).

from 10,000 ANA miles, from 15,000 JAL miles (economy, one way, based on the published award charts).

Shenzhen Bao'an International Airport (SZX) to Yanji Chaoyangchuan Airport (YNJ)・2,675 km

Nonstop flights available (1 airline). Flight time about 3h 39m. Nonstop return flights also operate.

With milesANA 10,000 miles+ (via ICN)JAL 15,000 miles+ (via NKG)Economy, one way, estimate. Tap a connection for miles by cabin.

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.