Are there nonstop flights from Olbia (OLB) to Singapore (SIN)?

No. The fastest connection is via Rome, about 13h 8m of total flying time.

What is the fastest connection from Olbia (OLB) to Singapore (SIN)?

via Rome ≈ 13h 8m, via Athens ≈ 13h 8m, via Dubai ≈ 13h 14m (estimated flying time, excluding layovers).

from 29,500 ANA miles, from 40,000 JAL miles (economy, one way, based on the published award charts).

Olbia Costa Smeralda Airport (OLB) to Singapore Changi Airport (SIN)・10,285 km

No nonstop flights. The fastest connection is via Rome (FCO), about 13h 8m of flying time (layover not included).

With milesANA 29,500 miles+ (via MUC)JAL 40,000 miles+ (via LHR)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

17 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.