Are there nonstop flights from Tongliao (TGO) to Singapore (SIN)?

No. The fastest connection is via Wuhan, about 6h 55m of total flying time.

What is the fastest connection from Tongliao (TGO) to Singapore (SIN)?

via Wuhan ≈ 6h 55m, via Jinan ≈ 6h 55m, via Shenzhen ≈ 6h 56m (estimated flying time, excluding layovers).

from 18,000 ANA miles (economy, one way, based on the published award charts).

Tongliao Airport (TGO) to Singapore Changi Airport (SIN)・5,028 km

No nonstop flights. The fastest connection is via Wuhan (WUH), about 6h 55m of flying time (layover not included).

With milesANA 18,000 miles+ (via PKX)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

9 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.