Are there nonstop flights from Chiang Mai (CNX) to Seattle (SEA)?

No. The fastest connection is via Chongqing, about 14h 38m of total flying time.

What is the fastest connection from Chiang Mai (CNX) to Seattle (SEA)?

via Chongqing ≈ 14h 38m, via Beijing ≈ 14h 38m, via Seoul ≈ 14h 50m (estimated flying time, excluding layovers).

from 40,000 ANA miles, from 45,000 JAL miles (economy, one way, based on the published award charts).

Chiang Mai International Airport (CNX) to Seattle–Tacoma International Airport (SEA)・11,580 km

No nonstop flights. The fastest connection is via Chongqing (CKG), about 14h 38m of flying time (layover not included).

With milesANA 40,000 miles+ (via TPE)JAL 45,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

7 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.