Are there nonstop flights from Bangkok (BKK) to Jeju City (CJU)?

No. The fastest connection is via Shanghai, about 5h of total flying time.

What is the fastest connection from Bangkok (BKK) to Jeju City (CJU)?

via Shanghai ≈ 5h, via Hangzhou ≈ 5h 1m, via Ningbo ≈ 5h 1m (estimated flying time, excluding layovers).

from 18,500 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Suvarnabhumi Airport (BKK) to Jeju International Airport (CJU)・3,408 km

No nonstop flights. The fastest connection is via Shanghai (PVG), about 5h of flying time (layover not included).

With milesANA 18,500 miles+ (via SZX)JAL 23,000 miles+ (via PVG)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

24 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.