Best Time to Fly PHX to SAT: On-Time Stats by Hour & Airline
Phoenix Sky Harbor International → San Antonio International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.3% of Phoenix (PHX) to San Antonio (SAT) flights arrived on time (2,522 scheduled flights). That is in line with the national average of 77.6%.
Among 4 airlines, Frontier Airlines led with 90.8% on time and Southwest Airlines was last with 74.6%.
Over 24 months, Tuesday was the most reliable day (85% on time) and July the worst month (70%).
The cancellation rate was 0.4% (US average 1.8%).
PHX to SAT on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlines | 90.8% | 34 min | 0.0% | 65 |
| American Airlines | 80.0% | 79 min | 0.7% | 998 |
| Envoy Air | 78.3% | 42 min | 0.0% | 70 |
| Southwest Airlines | 74.6% | 49 min | 0.2% | 1,389 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHX to SAT
On-time arrival % by scheduled departure hour (local time), 5,164 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 1 | |
| 5am–6am | 97.6% | 0.0% | 83 |
| 6am–7am | 96.0% | 0.5% | 203 |
| 7am–8am | 94.3% | 0.4% | 246 |
| 8am–9am | 92.3% | 0.2% | 416 |
| 9am–10am | 86.1% | 0.2% | 460 |
| 10am–11am | 82.3% | 0.5% | 408 |
| 11am–12pm | 87.1% | 0.6% | 172 |
| 12pm–1pm | 76.1% | 0.0% | 525 |
| 1pm–2pm | 82.7% | 0.6% | 355 |
| 2pm–3pm | 78.2% | 0.4% | 250 |
| 3pm–4pm | 76.3% | 0.6% | 178 |
| 4pm–5pm | 68.0% | 0.3% | 378 |
| 5pm–6pm | 75.1% | 0.8% | 243 |
| 6pm–7pm | 72.1% | 0.3% | 343 |
| 7pm–8pm | 66.0% | 0.9% | 551 |
| 8pm–9pm | 67.0% | 0.9% | 229 |
| 9pm–10pm | 66.7% | 0.0% | 109 |
| 10pm–11pm | Limited data | 11 | |
| 11pm–12am | Limited data | 3 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHX to SAT
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 77.5% | -3.1 pts | 0.0% | 111 |
| Christmas & New Year (Dec 20 - Jan 3) | 77.0% | -3.6 pts | 0.0% | 244 |
| Summer peak (Jun 15 - Aug 15) | 72.7% | -7.9 pts | 0.4% | 794 |
| All other days | 80.6% | — | 0.5% | 4,015 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).