Are there nonstop flights from Washington (IAD) to Sydney (SYD)?

No. The fastest connection is via Dallas-Fort Worth, about 19h 28m of total flying time.

What is the fastest connection from Washington (IAD) to Sydney (SYD)?

via Dallas-Fort Worth ≈ 19h 28m, via Los Angeles ≈ 19h 30m, via Houston ≈ 19h 32m (estimated flying time, excluding layovers).

from 30,000 ANA miles, from 47,000 JAL miles (economy, one way, based on the published award charts).

Washington Dulles International Airport (IAD) to Sydney Kingsford Smith International Airport (SYD)・15,681 km

No nonstop flights. The fastest connection is via Dallas-Fort Worth (DFW), about 19h 28m of flying time (layover not included).

With milesANA 30,000 miles+ (via HND)JAL 47,000 miles+ (via LAX)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

19 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.