Are there nonstop flights from Washington (IAD) to Hyannis (HYA)?

No. The fastest connection is via Philadelphia, about 1h 48m of total flying time.

What is the fastest connection from Washington (IAD) to Hyannis (HYA)?

via Philadelphia ≈ 1h 48m, via New York ≈ 1h 48m, via New York ≈ 1h 48m (estimated flying time, excluding layovers).

Washington Dulles International Airport (IAD) to Cape Cod Gateway Airport (HYA)・679 km

No nonstop flights. The fastest connection is via Philadelphia (PHL), about 1h 48m of flying time (layover not included).

None.

4 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.