Dulles (IAD) to San Juan (SJU)
Flight time
≈ 3h 57m
Bearing
151° SE
Dulles (IAD) to San Juan (SJU) is 1,574 miles (2,534 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAD–SJU
Filed traffic dataIn May 2026, United Airlines was the only carrier flying nonstop IAD–SJU; the Boeing 737 MAX 9 was the most common aircraft at 88% of departures; flights ran 92% full.
Departures
124
May 2026
Seats
22,053
both directions
Passengers
20,216
both directions
Load factor
91.7%
RPM ÷ ASM
Who flies IAD–SJU?
United Airlines was the only carrier to fly nonstop IAD–SJU in May 2026 (124 departures).
- UA
124 departures · 22,053 seats
Share of departures100.0%91.7%
Load
What plane flies IAD–SJU?
In May 2026, the Boeing 737 MAX 9 flew 88% of IAD–SJU departures — more than any other aircraft type.
- Boeing 737 MAX 9
109 departures · 91.5% load
87.9% - Boeing 737 MAX 8
11 departures · 95.3% load
8.9% - Boeing 737-900ER
4 departures · 88.5% load
3.2%
How has IAD–SJU traffic changed?
Nonstop IAD–SJU departures rose from 100 in June 2025 to 124 in May 2026.
Monthly nonstop IAD–SJU traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
100 departures · 16,645 passengers
88.9%
Load
July 2025
104 departures · 17,576 passengers
88.6%
Load
August 2025
100 departures · 16,366 passengers
88.1%
Load
September 2025
27 departures · 4,339 passengers
91.0%
Load
October 2025
87 departures · 12,628 passengers
82.3%
Load
November 2025
147 departures · 22,500 passengers
85.4%
Load
December 2025
155 departures · 24,701 passengers
84.5%
Load
January 2026
143 departures · 23,022 passengers
87.3%
Load
February 2026
127 departures · 21,273 passengers
89.9%
Load
March 2026
134 departures · 22,380 passengers
91.4%
Load
April 2026
125 departures · 19,410 passengers
85.9%
Load
May 2026
124 departures · 20,216 passengers
91.7%
Load
By direction
Each direction is filed separately — they rarely match.
IAD → SJU
90.4% full
62 departures · 9,903 passengers
SJU → IAD
92.9% full
62 departures · 10,313 passengers
Nonstop IAD–SJU traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
San Juan
PR
Luis Munoz Marin International Airport
Coordinates
18.44°N, 66.00°W
Hemisphere
N · W
Frequently asked
How far is Dulles (IAD) from San Juan (SJU)?
IAD to SJU is 1,574 miles (2,534 km / 1,368 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAD to SJU?
A nonstop covers the 1,574-mile great-circle distance in roughly 3h 57m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAD–SJU?
In May 2026, the Boeing 737 MAX 9 flew the largest share of departures (87.9%), followed by the Boeing 737 MAX 8 (8.9%).
What mileage do I earn flying IAD–SJU?
Distance-based programs credit off the 1,574-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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