Are there nonstop flights from Seattle (SEA) to Amami (ASJ)?

No. The fastest connection is via Tokyo, about 11h 31m of total flying time.

What is the fastest connection from Seattle (SEA) to Amami (ASJ)?

via Tokyo ≈ 11h 31m, via Tokyo ≈ 11h 31m (estimated flying time, excluding layovers).

Seattle–Tacoma International Airport (SEA) to Amami Airport (ASJ)・8,937 km

No nonstop flights. The fastest connection is via Tokyo (HND), about 11h 31m of flying time (layover not included).

None.

2 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.