Great-circle route IAD ↔ BOS. Faint dots are other airports, for geographic context. Download this map — free to reuse with a link back to this page.
Frequencies below are per direction, from our most recent schedule sample. The two directions are not identical — that is normal on scheduled routes.
| Direction | Frequency | Days | Airlines |
|---|---|---|---|
| IAD → BOS Washington to Boston |
35/wk | Daily | United Airlines |
| BOS → IAD Boston to Washington |
42/wk | Daily | United Airlines |
Where a direction shows “—” we track it as an operating nonstop but hold no schedule sample for it — we would rather show nothing than guess.
In 2025, airlines reported 464,977 passengers on 3,154 flights between IAD and BOS — about 1,275 a day — filling 86% of the 539,816 seats flown. United Air Lines Inc. carried the most passengers (99%).
Source: US DOT T-100 segment reports — actual airline-reported traffic, scheduled service only, both directions combined. Cargo and charter flights excluded.
United Airlines is the only airline flying the IAD–BOS nonstop.
Recent scheduled departures on this route have used the Boeing 737, Embraer 175, Boeing 737-800, Boeing 737-900.
Aircraft assignments change by season and by time of day.
The distance between Washington Dulles International Airport and General Edward Lawrence Logan International Airport is 412 miles, or 663 kilometres.
| Great-circle distance | 412 mi |
| Kilometres | 663 km |
| Nautical miles | 358 nmi |
Measured airport to airport. The actual track is longer — aircraft follow airways, avoid restricted airspace and route around weather.
Yes. United Airlines flies the route nonstop, with about 77 departures a week across both directions. The route is in our live nonstop dataset, last seeded 2026-07-07.
About 1h 27m in the air. That is a great-circle estimate from the 412-mile distance, not a scheduled block time — an airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
About 35 a week from Washington to Boston and 42 a week from Boston to Washington, from our most recent schedule sample.
United Airlines.
In 2025, airlines reported 464,977 passengers on 3,154 scheduled flights between IAD and BOS — about 1,275 a day — filling 86% of the seats flown. Source: US DOT T-100 segment reports, both directions combined.
Recent scheduled departures have used the Boeing 737, Embraer 175, Boeing 737-800, Boeing 737-900. Assignments change by season and by time of day.
