Are there nonstop flights from Bangkok (BKK) to Detroit (DTW)?

No. The fastest connection is via Seoul, about 17h 51m of total flying time.

What is the fastest connection from Bangkok (BKK) to Detroit (DTW)?

via Seoul ≈ 17h 51m, via Shanghai ≈ 17h 53m, via Tokyo ≈ 18h 32m (estimated flying time, excluding layovers).

from 40,000 ANA miles, from 47,000 JAL miles (economy, one way, based on the published award charts).

Suvarnabhumi Airport (BKK) to Detroit Metropolitan Wayne County Airport (DTW)・13,786 km

No nonstop flights. The fastest connection is via Seoul (ICN), about 17h 51m of flying time (layover not included).

With milesANA 40,000 miles+ (via FRA)JAL 47,000 miles+ (via CDG)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

13 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.