Are there nonstop flights from Seoul (ICN) to Bangkok (DMK)?

No. The fastest connection is via Haiphong, about 5h 18m of total flying time.

What is the fastest connection from Seoul (ICN) to Bangkok (DMK)?

via Haiphong ≈ 5h 18m, via Nanjing ≈ 5h 18m, via Changsha ≈ 5h 18m (estimated flying time, excluding layovers).

Incheon International Airport (ICN) to Don Mueang International Airport (DMK)・3,658 km

No nonstop flights. The fastest connection is via Haiphong (HPH), about 5h 18m of flying time (layover not included).

None.

46 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.