Are there nonstop flights from Doha (DOH) to St Louis (STL)?

No. The fastest connection is via Chicago, about 14h 58m of total flying time.

What is the fastest connection from Doha (DOH) to St Louis (STL)?

via Chicago ≈ 14h 58m, via Toronto ≈ 15h 2m, via Frankfurt am Main ≈ 15h 4m (estimated flying time, excluding layovers).

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

Hamad International Airport (DOH) to St. Louis Lambert International Airport (STL)・11,871 km

No nonstop flights. The fastest connection is via Chicago (ORD), about 14h 58m of flying time (layover not included).

With milesJAL 40,000 miles+ (via ORD)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

15 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.