Best Time to Fly SAT to DEN: On-Time Stats by Hour & Airline
San Antonio International → Denver International
Data through July 2026 · Last updated October 18, 2026
3,040 flights were scheduled from San Antonio (SAT) to Denver (DEN) in the last 12 months, and 81.8% of those that flew arrived on time, 4.2 points above the US average of 77.6%.
Among 3 airlines, United Airlines led with 82.7% on time and Frontier Airlines was last with 81.0%.
Over 24 months, Saturday was the most reliable day (83% on time) and June the worst month (70%).
The cancellation rate was 0.4% (US average 1.8%).
SAT to DEN 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 |
|---|---|---|---|---|
| United Airlines | 82.7% | 81 min | 0.7% | 1,205 |
| Southwest Airlines | 81.3% | 52 min | 0.2% | 1,434 |
| Frontier Airlines | 81.0% | 90 min | 0.5% | 383 |
| SkyWest Airlines | Limited data | 18 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAT to DEN
On-time arrival % by scheduled departure hour (local time), 6,111 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 96.1% | 0.5% | 768 |
| 6am–7am | 95.1% | 0.3% | 327 |
| 7am–8am | 91.5% | 2.1% | 48 |
| 8am–9am | 82.4% | 1.4% | 570 |
| 9am–10am | 87.1% | 0.8% | 400 |
| 10am–11am | 92.3% | 0.3% | 286 |
| 11am–12pm | 84.6% | 0.0% | 274 |
| 12pm–1pm | 86.7% | 0.0% | 243 |
| 1pm–2pm | 85.8% | 0.2% | 931 |
| 2pm–3pm | 80.8% | 0.6% | 173 |
| 3pm–4pm | 80.7% | 0.0% | 171 |
| 4pm–5pm | 73.7% | 0.1% | 855 |
| 5pm–6pm | 63.7% | 0.9% | 114 |
| 6pm–7pm | 63.6% | 0.6% | 349 |
| 7pm–8pm | 65.3% | 0.9% | 324 |
| 8pm–9pm | 70.8% | 0.4% | 254 |
| 9pm–10pm | Limited data | 11 | |
| 10pm–11pm | Limited data | 12 | |
| 11pm–12am | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SAT to DEN
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) | 84.5% | +1.5 pts | 0.0% | 123 |
| Christmas & New Year (Dec 20 - Jan 3) | 86.0% | +2.9 pts | 0.0% | 306 |
| Summer peak (Jun 15 - Aug 15) | 77.3% | -5.7 pts | 0.7% | 1,122 |
| All other days | 83.1% | — | 0.5% | 4,560 |
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).