Flight Reliability
AA 431 · American Airlines
Chicago → San Antonio (ORD–SAT)98% of its flights flew this route. The rest (CLT–SJC) are included in these numbers.
- 50%
- Arrive within 15 minutes
- 39 min
- Average arrival delay
- 4.6%
- Cancelled
- 10 min
- Median arrival delay
Based on 131 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
AA 431 departing between 6–9 PM arrived on time 53% of the time, versus 27% between 9 PM–12 AM.
Mondays have been rough.
AA 431 arrived on time 62% of the time on Saturdays and just 38% on Mondays. That gap is worth planning around.
Well behind the ORD–SAT route.
AA 431 arrived on time 50% of the time, versus 75% across the ORD–SAT route.
Well behind the American Airlines network.
AA 431 arrived on time 50% of the time, versus 77% across the American Airlines network.
The breakdown
- Mon38%(24 flights)
- Tue50%(14 flights)
- Wed54%(13 flights)
- Thu52%(21 flights)
- Fri53%(17 flights)
- Sat62%(13 flights)
- Sun52%(23 flights)
- 6–9 AM—(3 flights)
- 6–9 PM53%(107 flights)
- 9 PM–12 AM27%(15 flights)
Jun 36% → May 27% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 36% | 28 |
| July 2025 | 54% | 24 |
| August 2025 | 42% | 19 |
| September 2025 | 58% | 12 |
| October 2025 | 70% | 27 |
| May 2026 | 27% | 11 |
- Departures on time
- 46%
- Diverted
- 0%
- Flights flown
- 125
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 131 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.