Dulles (IAD) to San José (SJO)
Flight time
≈ 4h 53m
Bearing
194° S
Dulles (IAD) to San José (SJO) is 2,043 miles (3,288 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAD–SJO
Filed traffic dataIn May 2026, United Airlines was the only carrier flying nonstop IAD–SJO; the Boeing 737 MAX 8 was the most common aircraft at 100% of departures; flights ran 93% full.
Departures
1
May 2026
Seats
166
both directions
Passengers
155
both directions
Load factor
93.4%
RPM ÷ ASM
Who flies IAD–SJO?
United Airlines was the only carrier to fly nonstop IAD–SJO in May 2026 (1 departures).
- UA
1 departures · 166 seats
Share of departures100.0%93.4%
Load
What plane flies IAD–SJO?
In May 2026, the Boeing 737 MAX 8 flew 100% of IAD–SJO departures.
- Boeing 737 MAX 8
1 departures · 93.4% load
100.0%
How has IAD–SJO traffic changed?
Nonstop IAD–SJO departures fell from 34 in June 2025 to 1 in May 2026.
Monthly nonstop IAD–SJO traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
34 departures · 3,885 passengers
63.8%
Load
July 2025
38 departures · 5,451 passengers
80.0%
Load
August 2025
27 departures · 3,075 passengers
63.3%
Load
September 2025
0 departures · 0 passengers
—
Load
October 2025
0 departures · 0 passengers
—
Load
November 2025
11 departures · 1,573 passengers
85.5%
Load
December 2025
48 departures · 5,850 passengers
69.4%
Load
January 2026
44 departures · 5,537 passengers
71.9%
Load
February 2026
13 departures · 2,040 passengers
94.5%
Load
March 2026
18 departures · 2,749 passengers
92.0%
Load
April 2026
16 departures · 2,377 passengers
89.5%
Load
May 2026
1 departures · 155 passengers
93.4%
Load
Nonstop IAD–SJO 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 José
CR
Juan Santamaría International Airport
Coordinates
9.99°N, 84.21°W
Hemisphere
N · W
Frequently asked
How far is Dulles (IAD) from San José (SJO)?
IAD to SJO is 2,043 miles (3,288 km / 1,776 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAD to SJO?
A nonstop covers the 2,043-mile great-circle distance in roughly 4h 53m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAD–SJO?
In May 2026, the Boeing 737 MAX 8 flew the largest share of departures (100.0%).
What mileage do I earn flying IAD–SJO?
Distance-based programs credit off the 2,043-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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