Are there nonstop flights from Seattle (SEA) to Osaka (KIX)?

No. The fastest connection is via Vancouver, about 10h 34m of total flying time.

What is the fastest connection from Seattle (SEA) to Osaka (KIX)?

via Vancouver ≈ 10h 34m, via Tokyo ≈ 10h 34m, via Tokyo ≈ 10h 35m (estimated flying time, excluding layovers).

from 20,000 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

Seattle–Tacoma International Airport (SEA) to Kansai International Airport (KIX)・8,091 km

No nonstop flights. The fastest connection is via Vancouver (YVR), about 10h 34m of flying time (layover not included).

With milesANA 20,000 miles+ (via HND)JAL 37,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

NEWStarting soon: Hawaiian Airlines

15 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.