Are there nonstop flights from Seattle (SEA) to Olbia (OLB)?

No. The fastest connection is via Paris, about 11h 42m of total flying time.

What is the fastest connection from Seattle (SEA) to Olbia (OLB)?

via Paris ≈ 11h 42m, via London ≈ 11h 43m, via Dublin ≈ 11h 43m (estimated flying time, excluding layovers).

from 27,500 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

Seattle–Tacoma International Airport (SEA) to Olbia Costa Smeralda Airport (OLB)・9,104 km

No nonstop flights. The fastest connection is via Paris (CDG), about 11h 42m of flying time (layover not included).

With milesANA 27,500 miles+ (via FRA)JAL 37,000 miles+ (via LHR)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

11 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.