Are there nonstop flights from Tokyo (NRT) to Chiang Mai (CNX)?

No. The fastest connection is via Osaka, about 6h 16m of total flying time.

What is the fastest connection from Tokyo (NRT) to Chiang Mai (CNX)?

via Osaka ≈ 6h 16m, via Shanghai ≈ 6h 16m, via Hanoi ≈ 6h 17m (estimated flying time, excluding layovers).

from 19,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Narita International Airport (NRT) to Chiang Mai International Airport (CNX)・4,467 km

No nonstop flights. The fastest connection is via Osaka (KIX), about 6h 16m of flying time (layover not included).

With milesANA 19,000 miles+ (via TPE)JAL 23,000 miles+ (via PVG)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

18 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.