Are there nonstop flights from Singapore (SIN) to Sendai (SDJ)?

No. The fastest connection is via Osaka, about 7h 32m of total flying time.

What is the fastest connection from Singapore (SIN) to Sendai (SDJ)?

via Osaka ≈ 7h 32m, via Kaohsiung ≈ 7h 32m, via Okinawa (Naha) ≈ 7h 32m (estimated flying time, excluding layovers).

from 17,500 ANA miles (economy, one way, based on the published award charts).

Singapore Changi Airport (SIN) to Sendai Airport (SDJ)・5,557 km

No nonstop flights. The fastest connection is via Osaka (KIX), about 7h 32m of flying time (layover not included).

With milesANA 17,500 miles+ (via NGO)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.