Are there nonstop flights from Bangkok (BKK) to Tianjin (TSN)?

Yes. Xiamen Airlines fly this route. Flight time is about 4h 20m.

What is the fastest connection from Bangkok (BKK) to Tianjin (TSN)?

via Zhengzhou ≈ 4h 50m, via Guiyang ≈ 4h 51m, via Nanning ≈ 4h 52m (estimated flying time, excluding layovers).

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

Suvarnabhumi Airport (BKK) to Tianjin Binhai International Airport (TSN)・3,264 km

Nonstop flights available (1 airline). Flight time about 4h 20m. Nonstop return flights also operate.

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

36 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.