Are there nonstop flights from Washington (IAD) to Oklahoma City (OKC)?

No. The fastest connection is via Nashville, about 3h 11m of total flying time.

What is the fastest connection from Washington (IAD) to Oklahoma City (OKC)?

via Nashville ≈ 3h 11m, via Charlotte ≈ 3h 23m, via Chicago ≈ 3h 26m (estimated flying time, excluding layovers).

from 15,000 JAL miles, from 15,000 ANA miles (economy, one way, based on the published award charts).

Washington Dulles International Airport (IAD) to OKC Will Rogers World Airport (OKC)・1,824 km

No nonstop flights. The fastest connection is via Nashville (BNA), about 3h 11m of flying time (layover not included).

With milesJAL 15,000 miles+ (via CLT)ANA 15,000 miles+ (via ORD)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

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.