Are there nonstop flights from Chiang Mai (CNX) to Jeju City (CJU)?

No. The fastest connection is via Shanghai, about 4h 45m of total flying time.

What is the fastest connection from Chiang Mai (CNX) to Jeju City (CJU)?

via Shanghai ≈ 4h 45m, via Guangzhou ≈ 4h 52m, via Shenzhen ≈ 4h 55m (estimated flying time, excluding layovers).

from 15,000 JAL miles, from 18,500 ANA miles (economy, one way, based on the published award charts).

Chiang Mai International Airport (CNX) to Jeju International Airport (CJU)・3,184 km

No nonstop flights. The fastest connection is via Shanghai (PVG), about 4h 45m of flying time (layover not included).

With milesJAL 15,000 miles+ (via PVG)ANA 18,500 miles+ (via PEK)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

11 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.