Houston (IAH) – San Antonio (SAT)
- Distance
- 307 km
- 191 mi · 166 nm
- Flight time
- 1 h 3 min / 1 h 6 min
- Average gate to gate: IAH → SAT / back
- Time difference
- none
- CO2 per passenger
- 70 kg
- One way, economy, incl. RF (41 kg CO2 only)
- Passengers / year
- 592,728
- Aug 2025 – Jul 2026 · −1.1%
- Flights / week
- 112
- Both directions, average
- Seats filled
- 77%
- 773,302 seats a year
- Airlines nonstop
- 3
- UA, YV, OO
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from IAH
- 261°
- Heading from SAT
- 80°
- Halfway point
- 29.77, -96.91
- Great-circle km
- 306 km (sphere, for EU261)
- In the air IAH → SAT
- 38 min
- In the air SAT → IAH
- 39 min
- Clocks
- Same time in both
The estimate for a route without real times is 1 h 10 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 47,706 |
| Sep 2025 | 49,629 |
| Oct 2025 | 53,560 |
| Nov 2025 | 46,943 |
| Dec 2025 | 52,515 |
| Jan 2026 | 45,881 |
| Feb 2026 | 44,662 |
| Mar 2026 | 55,752 |
| Apr 2026 | 49,714 |
| May 2026 | 49,332 |
| Jun 2026 | 47,849 |
| Jul 2026 | 49,185 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 500 |
| Sep 2025 | 479 |
| Oct 2025 | 500 |
| Nov 2025 | 465 |
| Dec 2025 | 487 |
| Jan 2026 | 476 |
| Feb 2026 | 442 |
| Mar 2026 | 499 |
| Apr 2026 | 483 |
| May 2026 | 498 |
| Jun 2026 | 483 |
| Jul 2026 | 498 |
Airlines flying IAH–SAT nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| UAUnited Air Lines | 89 | 89% |
| YVMesa Airlines | 19 | 9% |
| OOSkyWest Airlines | 4.1 | 2% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Embraer ERJ-175 · 1,175 flights
- Airbus Industrie A319 · 1,124 flights
- Boeing 737-700/700LR/Max 7 · 1,001 flights
- Boeing 737-800 · 639 flights
- Airbus Industrie A320-100/200 · 625 flights
- Boeing 737-900ER · 455 flights
- Boeing B737 Max 800 · 272 flights
- Boeing B737 Max 900 · 262 flights
Also carried: 63 tonnes of freight and 2 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 82.3%
- Arrived within 15 min of schedule
- Average delay
- 11 min
- Late arrivals count, early ones as 0
- Cancelled
- 0.5%
- Flights counted
- 4,811
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| UAUnited Air Lines | 82.2% | 11 min |
| OOSkyWest Airlines | 83.6% | 12 min |
Delay minutes by cause: airline 28% · aircraft arriving late 36% · air traffic system 32% · weather 4% · security 0%.
Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources
What passengers paid
- Average fare, Q3 2025
- $247
- One way, all cabins
- Average over a year
- $247
- Q3 2025 – Q3 2025
- Largest airline
- United Air Lines
- 99% of passengers · $246
- Lowest-fare airline
- United Air Lines
- 99% of passengers · $246
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q3 2025 $247).
U.S. DOT Consumer Airfare Report, Table 1a (airline ticket sample, US domestic airport pairs). Sources
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 306 km.
Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.
Every airport pair between Houston and San Antonio
Kilometres. Linked numbers have a page of their own. All Houston airports
More routes from IAH
| Route | Distance | Passengers / year |
|---|---|---|
| IAH → ORD | 1,489 km | 1,711,056 |
| IAH → DEN | 1,387 km | 1,641,444 |
| IAH → LAX | 2,219 km | 1,544,652 |
| IAH → ATL | 1,109 km | 1,430,755 |
| IAH → DFW | 361 km | 1,257,452 |
| IAH → SFO | 2,632 km | 1,223,236 |
| IAH → MCO | 1,375 km | 1,147,728 |
| IAH → EWR | 2,252 km | 1,135,261 |
| IAH → LGA | 2,279 km | 1,049,227 |
| IAH → LAS | 1,966 km | 1,028,809 |