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.
Look up a route, or build a trip
Change the airports, or add stops for a multi-leg trip.
What actually flies IAH–SAT
Filed traffic dataIn May 2026, United Airlines operated the most departures, one of 5 carriers flying nonstop IAH–SAT; the Embraer E175 was the most common aircraft at 29% of departures; flights ran 77% full.
Departures
498
May 2026
Seats
63,793
both directions
Passengers
49,332
both directions
Load factor
77.3%
RPM ÷ ASM
Who flies IAH–SAT?
United Airlines operated the most nonstop IAH–SAT departures in May 2026 (353), one of 5 carriers on the route.
- UA
353 departures · 52,952 seats
Share of departures70.9%77.5%
Load
- YV
123 departures · 8,910 seats
Share of departures24.7%77.0%
Load
- OO
19 departures · 1,438 seats
Share of departures3.8%73.9%
Load
- DL
2 departures · 321 seats
Share of departures0.4%89.7%
Load
- AA
1 departures · 172 seats
Share of departures0.2%58.1%
Load
What plane flies IAH–SAT?
In May 2026, the Embraer E175 flew 29% of IAH–SAT departures — more than any other aircraft type.
- Embraer E175
142 departures · 76.5% load
28.5% - Airbus A319
86 departures · 83.3% load
17.3% - Boeing 737-700
72 departures · 87.8% load
14.5% - Boeing 737-900
52 departures · 74.1% load
10.4% - Boeing 737 MAX 8
45 departures · 67.3% load
9.0% - Airbus A320
34 departures · 82.6% load
6.8% - Boeing 737-800
29 departures · 78.1% load
5.8% - Boeing 737-900ER
19 departures · 61.9% load
3.8% - Boeing 737 MAX 9
17 departures · 66.6% load
3.4% - Airbus A321neo
1 departures · 95.5% load
0.2% - Airbus A321
1 departures · 98.9% load
0.2%
How has IAH–SAT traffic changed?
Nonstop IAH–SAT departures rose from 493 in June 2025 to 498 in May 2026.
Monthly nonstop IAH–SAT traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
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
May 2026
498 departures · 49,332 passengers
77.3%
Load
By direction
Each direction is filed separately — they rarely match.
IAH → SAT
76.0% full
250 departures · 24,110 passengers
SAT → IAH
78.7% full
248 departures · 25,222 passengers
Nonstop IAH–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 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 May 2026, the Embraer E175 flew the largest share of departures (28.5%), followed by the Airbus A319 (17.3%).
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.
Keep exploring
Every route below is its own page.
Popular long-haul routes