Are there nonstop flights from Istanbul (SAW) to Seoul (ICN)?

No. The fastest connection is via Astana, about 10h 19m of total flying time.

What is the fastest connection from Istanbul (SAW) to Seoul (ICN)?

via Astana ≈ 10h 19m, via Almaty ≈ 10h 29m, via Bishkek ≈ 10h 30m (estimated flying time, excluding layovers).

from 45,000 JAL miles (economy, one way, based on the published award charts).

Istanbul Sabiha Gökçen International Airport (SAW) to Incheon International Airport (ICN)・7,907 km

No nonstop flights. The fastest connection is via Astana (NQZ), about 10h 19m of flying time (layover not included).

With milesJAL 45,000 miles+ (via DOH)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

22 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.