Boston (BOS) to Dulles (IAD)
Flight time
≈ 1h 37m
Bearing
237° SW
Boston (BOS) to Dulles (IAD) is 412 miles (663 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BOS–IAD
Filed traffic dataIn June 2026, United Airlines operated the most departures, one of 4 carriers flying nonstop BOS–IAD; the Boeing 737 MAX 9 was the most common aircraft at 61% of departures; flights ran 87% full.
Departures
240
June 2026
Seats
42,563
both directions
Passengers
37,214
both directions
Load factor
87.4%
RPM ÷ ASM
Who flies BOS–IAD?
United Airlines operated the most nonstop BOS–IAD departures in June 2026 (237), one of 4 carriers on the route.
- UA
237 departures · 42,070 seats
Share of departures98.8%87.7%
Load
- DL
1 departures · 72 seats
Share of departures0.4%0.0%
Load
- TP
TAP-TAP Air Portugal
1 departures · 163 seats
Share of departures0.4%92.6%
Load
- VS
Virgin Atlantic
1 departures · 258 seats
Share of departures0.4%66.7%
Load
What plane flies BOS–IAD?
In June 2026, the Boeing 737 MAX 9 flew 61% of BOS–IAD departures — more than any other aircraft type.
- Boeing 737 MAX 9
146 departures · 86.4% load
60.8% - Boeing 737-900ER
56 departures · 90.4% load
23.3% - Boeing 737-800
32 departures · 90.4% load
13.3% - Boeing 767-300
1 departures · 91.6% load
0.4% - Airbus A330-900
1 departures · 92.6% load
0.4% - Boeing 737 MAX 8
1 departures · 94.0% load
0.4% - Boeing 787-9
1 departures · 66.7% load
0.4% - Boeing 757-200
1 departures · 0.0% load
0.4% - Boeing 767-400ER
1 departures · 50.6% load
0.4%
How has BOS–IAD traffic changed?
Nonstop BOS–IAD departures fell from 254 in July 2025 to 240 in June 2026.
Monthly nonstop BOS–IAD traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.
July 2025
254 departures · 39,598 passengers
88.4%
Load
August 2025
267 departures · 42,025 passengers
90.0%
Load
September 2025
283 departures · 40,503 passengers
82.6%
Load
October 2025
251 departures · 38,811 passengers
90.2%
Load
November 2025
239 departures · 35,521 passengers
85.9%
Load
December 2025
246 departures · 36,254 passengers
87.0%
Load
January 2026
210 departures · 28,778 passengers
79.6%
Load
February 2026
199 departures · 26,951 passengers
78.8%
Load
March 2026
241 departures · 35,794 passengers
85.6%
Load
April 2026
240 departures · 36,075 passengers
85.3%
Load
May 2026
250 departures · 38,021 passengers
86.6%
Load
June 2026
240 departures · 37,214 passengers
87.4%
Load
By direction
Each direction is filed separately — they rarely match.
BOS → IAD
86.5% full
123 departures · 18,711 passengers
IAD → BOS
88.3% full
117 departures · 18,503 passengers
Nonstop BOS–IAD traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through June 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Boston (BOS) from Dulles (IAD)?
BOS to IAD is 412 miles (663 km / 358 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BOS to IAD?
A nonstop covers the 412-mile great-circle distance in roughly 1h 37m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BOS–IAD?
In June 2026, the Boeing 737 MAX 9 flew the largest share of departures (60.8%), followed by the Boeing 737-900ER (23.3%).
What mileage do I earn flying BOS–IAD?
Distance-based programs credit off the 412-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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