Airports › San Antonio (SAT) › May 2025
Airport month · May 2025
San Antonio International in May 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In May 2025, reporting carriers scheduled 3,758 domestic departures from San Antonio International (SAT). 77.7% left less than 15 minutes late and 77.9% reached their destination on time; 1.2% were cancelled.
Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so SAT departures were 1.0 points above the national departure figure.
A year earlier, in May 2024, the airport had 3,536 departures with 74.0% leaving on time: a change of +3.7 points, with flights up 6%.
Flights arriving at SAT that month were on time 72.6% of the time (3,758 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 47%, national aviation system 22% and air carrier 21%.
- On time 77.9%
- Arrived 15+ minutes late 20.4%
- Cancelled 1.2%
- Diverted 0.5%
May 2025 against a year earlier, the airport's year and the nation
| Measure | May 2025 | May 2024 | SAT, 12 months to Jul 2026 | All reported flights, May 2025 |
|---|---|---|---|---|
| Departed on time | 77.7% | 74.0% | 80.3% | 76.7% |
| Arrived on time | 77.9% | 73.3% | 80.6% | 75.4% |
| Cancelled | 1.2% | 2.2% | 1.2% | 1.0% |
| Average departure delay (late minutes only) | 18.2 min | 20.9 min | 14.7 min | 17.5 min |
| Scheduled departures a day | 125 | 118 | 110 | 20,188 |
| Scheduled departures | 3,758 | 3,536 | 40,226 | 605,648 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| WN Southwest Airlines | 1,417 | 38% | 81.9% | 3.3 min | 0.7% |
| AA American Airlines | 642 | 17% | 75.7% | 19.0 min | 2.3% |
| DL Delta Air Lines | 618 | 16% | 75.7% | 6.5 min | 0.5% |
| UA United Airlines | 440 | 12% | 76.1% | 11.9 min | 1.4% |
| NK Spirit Airlines | 218 | 6% | 74.8% | 11.8 min | 0.9% |
| OO SkyWest Airlines | 158 | 4% | 87.3% | -1.3 min | 0.0% |
| MQ Envoy Air | 154 | 4% | 68.8% | 24.2 min | 4.5% |
| AS Alaska Airlines | 60 | 2% | 65.0% | 9.5 min | 0.0% |
| F9 Frontier Airlines | 51 | 1% | 60.8% | 26.1 min | 3.9% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SAT–DFW | San Antonio to Dallas/Fort Worth | 400 | 68.0% | 22.9 min | 4.3% |
| SAT–ATL | San Antonio to Atlanta | 300 | 71.0% | 13.1 min | 0.7% |
| SAT–DEN | San Antonio to Denver | 270 | 75.6% | 11.6 min | 0.7% |
| SAT–DAL | San Antonio to Dallas | 256 | 78.1% | 5.0 min | 2.3% |
| SAT–PHX | San Antonio to Phoenix | 224 | 86.6% | 4.1 min | 0.4% |
| SAT–LAS | San Antonio to Las Vegas | 213 | 80.8% | 5.9 min | 0.5% |
| SAT–IAH | San Antonio to Houston | 198 | 74.7% | 11.0 min | 2.0% |
| SAT–LAX | San Antonio to Los Angeles | 185 | 82.2% | 7.3 min | 0.0% |
| SAT–ORD | San Antonio to Chicago | 171 | 80.1% | 3.1 min | 1.2% |
| SAT–HOU | San Antonio to Houston | 133 | 78.2% | 8.4 min | 0.8% |
| SAT–CLT | San Antonio to Charlotte | 123 | 81.3% | 31.9 min | 1.6% |
| SAT–BNA | San Antonio to Nashville | 95 | 84.2% | -0.1 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left SAT on time in May 2025?
77.7% of 3,758 scheduled domestic departures left less than 15 minutes late, and 77.9% reached their destination on time. The national figures that month were 76.7% and 75.4%.
How does that compare with a year earlier?
In May 2024, 74.0% of 3,536 departures left on time and 2.2% were cancelled, against 77.7% and 1.2% in May 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for SAT · methodology · corrections.