Dulles (IAD) to San Antonio (SAT)
Flight time
≈ 3h 31m
Bearing
248° W
Dulles (IAD) to San Antonio (SAT) is 1,360 miles (2,189 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAD–SAT
Filed traffic dataIn May 2026, United Airlines operated the most departures, one of 2 carriers flying nonstop IAD–SAT; the Boeing 737 MAX 9 was the most common aircraft at 46% of departures; flights ran 88% full.
Departures
109
May 2026
Seats
17,032
both directions
Passengers
14,918
both directions
Load factor
87.6%
RPM ÷ ASM
Who flies IAD–SAT?
United Airlines operated the most nonstop IAD–SAT departures in May 2026 (99), one of 2 carriers on the route.
- UA
99 departures · 16,296 seats
Share of departures90.8%87.5%
Load
- YV
10 departures · 736 seats
Share of departures9.2%90.6%
Load
What plane flies IAD–SAT?
In May 2026, the Boeing 737 MAX 9 flew 46% of IAD–SAT departures — more than any other aircraft type.
- Boeing 737 MAX 9
50 departures · 86.3% load
45.9% - Boeing 737 MAX 8
24 departures · 86.7% load
22.0% - Boeing 737-700
21 departures · 92.8% load
19.3% - Embraer E175
10 departures · 90.6% load
9.2% - Boeing 737-900ER
4 departures · 85.9% load
3.7%
How has IAD–SAT traffic changed?
Nonstop IAD–SAT departures rose from 103 in June 2025 to 109 in May 2026.
Monthly nonstop IAD–SAT traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
103 departures · 14,992 passengers
89.6%
Load
July 2025
122 departures · 15,880 passengers
86.5%
Load
August 2025
108 departures · 12,567 passengers
76.8%
Load
September 2025
103 departures · 13,055 passengers
80.1%
Load
October 2025
110 departures · 14,022 passengers
79.7%
Load
November 2025
120 departures · 15,701 passengers
74.5%
Load
December 2025
126 departures · 16,609 passengers
83.2%
Load
January 2026
101 departures · 11,902 passengers
78.2%
Load
February 2026
103 departures · 11,884 passengers
75.3%
Load
March 2026
124 departures · 15,920 passengers
88.2%
Load
April 2026
117 departures · 14,350 passengers
88.7%
Load
May 2026
109 departures · 14,918 passengers
87.6%
Load
By direction
Each direction is filed separately — they rarely match.
IAD → SAT
87.3% full
55 departures · 7,486 passengers
SAT → IAD
87.9% full
54 departures · 7,432 passengers
Nonstop IAD–SAT 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
Frequently asked
How far is Dulles (IAD) from San Antonio (SAT)?
IAD to SAT is 1,360 miles (2,189 km / 1,182 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAD to SAT?
A nonstop covers the 1,360-mile great-circle distance in roughly 3h 31m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAD–SAT?
In May 2026, the Boeing 737 MAX 9 flew the largest share of departures (45.9%), followed by the Boeing 737 MAX 8 (22.0%).
What mileage do I earn flying IAD–SAT?
Distance-based programs credit off the 1,360-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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