UA 721Boston to Washington

United Airlines🇺🇸BOS🇺🇸IADBoston Logan International Airport to Washington Dulles International Airport

Departs

13:40

observed schedule, local to Boston

Operates

Daily

2026–27 observed schedule

Distance

663 km

412 miles

Stored schedule example

1 hr 41 min

Departure (America/New_York): 21 Oct 2026, 14:15; arrival (America/New_York): 21 Oct 2026, 15:56

Observations: 1 Jul to 21 Oct 2026. This period describes the flights recorded, not whether the timetable is still valid.

The route

Great circle, 663 km

663 km (412 miles) great-circle, measured between the two airports' published coordinates. The line is the shortest path over the globe, which on a flat map bows away from a straight line.

What flies it

55 sightings

Boeing 737-900ER (B739) in 87% of 55 observations; also Boeing 737 MAX 9 (B39M), Airbus A319-100 (A319).

Aircraft types we recorded on this flight. A type is never inferred from the route, so a flight we have not seen closely shows none.

Where it goes

BOS → IADBoston to WashingtonEvery airline on this route BOSBoston Logan International AirportDeparture airport IADWashington Dulles International AirportArrival airport

How these numbers are measured