Are there nonstop flights from Guilin (KWL) to Seoul (ICN)?

Yes. Jeju Air, Jin Air fly this route. Flight time is about 2h 56m.

What is the fastest connection from Guilin (KWL) to Seoul (ICN)?

via Nanjing ≈ 3h 25m, via Yancheng ≈ 3h 26m, via Yangzhou ≈ 3h 26m (estimated flying time, excluding layovers).

from 11,000 ANA miles, from 15,000 JAL miles (economy, one way, based on the published award charts).

Guilin Liangjiang International Airport (KWL) to Incheon International Airport (ICN)・2,064 km

Nonstop flights available (2 airlines). Flight time about 2h 56m. Nonstop return flights also operate.

With milesANA 11,000 miles+ (via TSN)JAL 15,000 miles+ (via NKG)Economy, one way, estimate. Tap a connection for miles by cabin.

30 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.