Are there nonstop flights from Seattle (SEA) to Dhaka (DAC)?

No. The fastest connection is via Beijing, about 14h 48m of total flying time.

What is the fastest connection from Seattle (SEA) to Dhaka (DAC)?

via Beijing ≈ 14h 48m, via Tokyo ≈ 15h 49m, via Hong Kong ≈ 16h 7m (estimated flying time, excluding layovers).

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

Seattle–Tacoma International Airport (SEA) to Hazrat Shahjalal International Airport (DAC)・11,438 km

No nonstop flights. The fastest connection is via Beijing (PEK), about 14h 48m of flying time (layover not included).

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

None.

10 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.