Are there nonstop flights from Bangkok (BKK) to Chicago (ORD)?

No. The fastest connection is via Seoul, about 17h 42m of total flying time.

What is the fastest connection from Bangkok (BKK) to Chicago (ORD)?

via Seoul ≈ 17h 42m, via Hong Kong ≈ 17h 43m, via Taipei ≈ 18h 2m (estimated flying time, excluding layovers).

from 27,500 ANA miles, from 47,000 JAL miles (economy, one way, based on the published award charts).

Suvarnabhumi Airport (BKK) to Chicago O'Hare International Airport (ORD)・13,763 km

No nonstop flights. The fastest connection is via Seoul (ICN), about 17h 42m of flying time (layover not included).

With milesANA 27,500 miles+ (via HND)JAL 47,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

29 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.