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 July 2026, United Airlines operated the most departures, one of 2 carriers flying nonstop IAD–SJU; the Boeing 737 MAX 9 was the most common aircraft at 71% of departures; flights ran 94% full.
Departures
126
July 2026
Seats
22,121
both directions
Passengers
20,696
both directions
Load factor
93.6%
RPM ÷ ASM
Who flies IAD–SJU?
United Airlines operated the most nonstop IAD–SJU departures in July 2026 (125), one of 2 carriers on the route.
- UA
125 departures · 21,959 seats
Share of departures99.2%93.7%
Load
- B6
1 departures · 162 seats
Share of departures0.8%80.3%
Load
What plane flies IAD–SJU?
In July 2026, the Boeing 737 MAX 9 flew 71% of IAD–SJU departures — more than any other aircraft type.
- Boeing 737 MAX 9
89 departures · 93.4% load
70.6% - Boeing 737 MAX 8
32 departures · 94.9% load
25.4% - Boeing 737-900ER
4 departures · 89.8% load
3.2% - Airbus A320
1 departures · 80.3% load
0.8%
How has IAD–SJU traffic changed?
Nonstop IAD–SJU departures rose from 100 in August 2025 to 126 in July 2026.
Monthly nonstop IAD–SJU traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
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
June 2026
120 departures · 19,541 passengers
92.7%
Load
July 2026
126 departures · 20,696 passengers
93.6%
Load
By direction
Each direction is filed separately — they rarely match.
SJU → IAD
94.8% full
64 departures · 10,829 passengers
IAD → SJU
92.3% full
62 departures · 9,867 passengers
Nonstop IAD–SJU traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 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 July 2026, the Boeing 737 MAX 9 flew the largest share of departures (70.6%), followed by the Boeing 737 MAX 8 (25.4%).
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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