Best Time to Fly DTW to SAT: On-Time Stats by Hour & Airline
Detroit Metro Wayne County → San Antonio International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 80.6% of Detroit (DTW) to San Antonio (SAT) flights arrived on time (944 scheduled flights). That is 3.0 points above the national average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (85% on time) and January the worst month (69%).
The cancellation rate was 0.7% (US average 1.8%).
DTW 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 |
|---|---|---|---|---|
| Delta Air Lines | 80.5% | 55 min | 0.8% | 934 |
| Spirit Airlines | Limited data | 10 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DTW to SAT
On-time arrival % by scheduled departure hour (local time), 1,879 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 10 | |
| 8am–9am | 87.1% | 0.5% | 655 |
| 9am–10am | Limited data | 6 | |
| 10am–11am | 81.1% | 1.8% | 55 |
| 11am–12pm | Limited data | 3 | |
| 12pm–1pm | 83.6% | 0.0% | 110 |
| 1pm–2pm | 81.6% | 0.0% | 305 |
| 2pm–3pm | Limited data | 1 | |
| 3pm–4pm | Limited data | 1 | |
| 4pm–5pm | 82.0% | 0.0% | 50 |
| 5pm–6pm | Limited data | 3 | |
| 7pm–8pm | Limited data | 17 | |
| 8pm–9pm | 72.0% | 1.1% | 607 |
| 9pm–10pm | 78.6% | 0.0% | 56 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DTW 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) | 55.6% | -26.1 pts | 0.0% | 36 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.7% | -3.0 pts | 0.0% | 75 |
| Summer peak (Jun 15 - Aug 15) | 79.5% | -2.1 pts | 1.7% | 358 |
| All other days | 81.6% | — | 0.3% | 1,410 |
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).