Houston (IAH) to San Antonio (SAT)
Flight time
≈ 1h 11m
Bearing
261° W
Houston (IAH) to San Antonio (SAT) is 190 miles (306 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAH–SAT
Filed traffic dataIn July 2026, United Airlines operated the most departures, one of 4 carriers flying nonstop IAH–SAT; the Embraer E175 was the most common aircraft at 36% of departures; flights ran 81% full.
Departures
498
July 2026
Seats
60,977
both directions
Passengers
49,185
both directions
Load factor
80.7%
RPM ÷ ASM
Who flies IAH–SAT?
United Airlines operated the most nonstop IAH–SAT departures in July 2026 (319), one of 4 carriers on the route.
- UA
319 departures · 47,819 seats
Share of departures64.1%79.1%
Load
- YV
134 departures · 9,698 seats
Share of departures26.9%87.9%
Load
- OO
44 departures · 3,332 seats
Share of departures8.8%81.9%
Load
- AA
1 departures · 128 seats
Share of departures0.2%93.0%
Load
What plane flies IAH–SAT?
In July 2026, the Embraer E175 flew 36% of IAH–SAT departures — more than any other aircraft type.
- Embraer E175
178 departures · 86.4% load
35.7% - Boeing 737-800
84 departures · 76.8% load
16.9% - Airbus A319
78 departures · 84.3% load
15.7% - Boeing 737-700
58 departures · 88.2% load
11.7% - Boeing 737-900
36 departures · 67.8% load
7.2% - Airbus A320
33 departures · 85.1% load
6.6% - Boeing 737 MAX 9
13 departures · 73.9% load
2.6% - Boeing 737-900ER
12 departures · 63.2% load
2.4% - Boeing 737 MAX 8
6 departures · 83.7% load
1.2%
How has IAH–SAT traffic changed?
Nonstop IAH–SAT departures fell from 500 in August 2025 to 498 in July 2026.
Monthly nonstop IAH–SAT traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
500 departures · 47,706 passengers
70.2%
Load
September 2025
479 departures · 49,629 passengers
73.6%
Load
October 2025
500 departures · 53,560 passengers
75.5%
Load
November 2025
465 departures · 46,943 passengers
74.0%
Load
December 2025
487 departures · 52,515 passengers
77.8%
Load
January 2026
476 departures · 45,881 passengers
79.1%
Load
February 2026
442 departures · 44,662 passengers
80.3%
Load
March 2026
499 departures · 55,752 passengers
78.4%
Load
April 2026
483 departures · 49,714 passengers
72.8%
Load
May 2026
498 departures · 49,332 passengers
77.3%
Load
June 2026
483 departures · 47,849 passengers
82.1%
Load
July 2026
498 departures · 49,185 passengers
80.7%
Load
By direction
Each direction is filed separately — they rarely match.
SAT → IAH
80.8% full
250 departures · 24,925 passengers
IAH → SAT
80.5% full
248 departures · 24,260 passengers
Nonstop IAH–SAT 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
Frequently asked
How far is Houston (IAH) from San Antonio (SAT)?
IAH to SAT is 190 miles (306 km / 165 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAH to SAT?
A nonstop covers the 190-mile great-circle distance in roughly 1h 11m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAH–SAT?
In July 2026, the Embraer E175 flew the largest share of departures (35.7%), followed by the Boeing 737-800 (16.9%).
What mileage do I earn flying IAH–SAT?
Distance-based programs credit off the 190-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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