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
US DOT T-100 · filed dataIn April 2026, United Airlines operated the most departures, one of 3 carriers flying nonstop IAH–SAT; the Airbus A320 was the most common aircraft at 19% of departures; flights ran 73% full.
Departures
483
April 2026
Seats
68,298
both directions
Passengers
49,714
both directions
Load factor
72.8%
passengers ÷ seats
Who flies IAH–SAT?
United Airlines operated the most nonstop IAH–SAT departures in April 2026 (425), one of 3 carriers on the route.
- UA
United Airlines
425 departures · 64,124 seats
Share of departures88.0%72.3%
Load
- YV
Mesa Airlines
49 departures · 3,490 seats
Share of departures10.1%83.7%
Load
- OO
SkyWest Airlines
9 departures · 684 seats
Share of departures1.9%61.0%
Load
What plane flies IAH–SAT?
In April 2026, the Airbus A320 flew 19% of IAH–SAT departures — more than any other aircraft type.
- Airbus A320
90 departures · 68.0% load
18.6% - Airbus A319
84 departures · 81.1% load
17.4% - Boeing 737-700
79 departures · 86.6% load
16.4% - Boeing 737-900ER
78 departures · 76.6% load
16.2% - Embraer E175
58 departures · 80.0% load
12.0% - Boeing 737-800
44 departures · 45.1% load
9.1% - Boeing 737 MAX 9
40 departures · 71.5% load
8.3% - Boeing 737 MAX 8
10 departures · 53.3% load
2.1%
How has IAH–SAT traffic changed?
Nonstop IAH–SAT departures fell from 512 in May 2025 to 483 in April 2026.
Monthly nonstop IAH–SAT traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
512 departures · 51,580 passengers
73.2%
Load
June 2025
493 departures · 52,331 passengers
78.9%
Load
July 2025
512 departures · 53,099 passengers
78.2%
Load
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
By direction
The DOT files each direction separately — they rarely match.
SAT → IAH
70.9% full
243 departures · 24,899 passengers
IAH → SAT
74.8% full
240 departures · 24,815 passengers
Nonstop IAH–SAT traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
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 April 2026, the Airbus A320 flew the largest share of departures (18.6%), followed by the Airbus A319 (17.4%).
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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