Are there nonstop flights from Nagasaki (NGS) to Bangkok (BKK)?

No. The fastest connection is via Seoul, about 6h 1m of total flying time.

What is the fastest connection from Nagasaki (NGS) to Bangkok (BKK)?

via Seoul ≈ 6h 1m, via Osaka ≈ 6h 31m, via Nagoya ≈ 6h 51m (estimated flying time, excluding layovers).

from 13,500 JAL miles, from 15,000 ANA miles (economy, one way, based on the published award charts).

Nagasaki Airport (NGS) to Suvarnabhumi Airport (BKK)・3,645 km

No nonstop flights. The fastest connection is via Seoul (ICN), about 6h 1m of flying time (layover not included).

With milesJAL 13,500 miles+ (via HND)ANA 15,000 miles+ (via HND)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

5 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.