Are there nonstop flights from Washington (DCA) to Philadelphia (PHL)?

Yes. American Eagle (airline brand) fly this route. Flight time is about 44m.

What is the fastest connection from Washington (DCA) to Philadelphia (PHL)?

via Norfolk ≈ 1h 40m, via Pittsburgh ≈ 1h 53m, via Hartford ≈ 1h 58m (estimated flying time, excluding layovers).

from 12,000 JAL miles (economy, one way, based on the published award charts).

Ronald Reagan Washington National Airport (DCA) to Philadelphia International Airport (PHL)・192 km

Nonstop flights available (1 airline). Flight time about 44m. Nonstop return flights also operate.

With milesJAL 12,000 miles+ (via PIT)Economy, one way, estimate. Tap a connection for miles by cabin.

5 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.