Are there nonstop flights from Washington (IAD) to Shenzhen (SZX)?

No. The fastest connection is via Beijing, about 16h 22m of total flying time.

What is the fastest connection from Washington (IAD) to Shenzhen (SZX)?

via Beijing ≈ 16h 22m, via Seoul ≈ 16h 33m, via Taipei ≈ 16h 49m (estimated flying time, excluding layovers).

from 22,500 ANA miles, from 47,000 JAL miles (economy, one way, based on the published award charts).

Washington Dulles International Airport (IAD) to Shenzhen Bao'an International Airport (SZX)・13,068 km

No nonstop flights. The fastest connection is via Beijing (PEK), about 16h 22m of flying time (layover not included).

With milesANA 22,500 miles+ (via HND)JAL 47,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

20 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.