Are there nonstop flights from Bangkok (BKK) to Surabaya (SUB)?

No. The fastest connection is via Singapore, about 4h 17m of total flying time.

What is the fastest connection from Bangkok (BKK) to Surabaya (SUB)?

via Singapore ≈ 4h 17m, via Kuala Lumpur ≈ 4h 24m, via Penang ≈ 4h 26m (estimated flying time, excluding layovers).

from 15,000 ANA miles, from 15,000 JAL miles (economy, one way, based on the published award charts).

Suvarnabhumi Airport (BKK) to Juanda International Airport (SUB)・2,693 km

No nonstop flights. The fastest connection is via Singapore (SIN), about 4h 17m of flying time (layover not included).

With milesANA 15,000 miles+ (via SIN)JAL 15,000 miles+ (via KUL)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.