Are there nonstop flights from Seattle (SEA) to Cape Town (CPT)?

No. The fastest connection is via Newark, about 20h 21m of total flying time.

What is the fastest connection from Seattle (SEA) to Cape Town (CPT)?

via Newark ≈ 20h 21m, via Washington ≈ 20h 22m, via Atlanta ≈ 20h 31m (estimated flying time, excluding layovers).

from 35,000 ANA miles, from 50,000 JAL miles (economy, one way, based on the published award charts).

Seattle–Tacoma International Airport (SEA) to Cape Town International Airport (CPT)・16,444 km

No nonstop flights. The fastest connection is via Newark (EWR), about 20h 21m of flying time (layover not included).

With milesANA 35,000 miles+ (via EWR)JAL 50,000 miles+ (via LHR)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

12 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.