Best Time to Fly JFK to SAT: On-Time Stats by Hour & Airline
John F. Kennedy International → San Antonio International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 88.4% of New York (JFK) to San Antonio (SAT) flights arrived on time (362 scheduled flights). That is 10.8 points above the national average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
April has been the best month (95% on time) and Sunday the weakest day of the week (81%).
4.1% of flights were cancelled, versus 1.8% nationally.
JFK 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 | 88.4% | 108 min | 4.1% | 362 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly JFK to SAT
On-time arrival % by scheduled departure hour (local time), 808 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 1 | |
| 7am–8am | 91.1% | 3.2% | 279 |
| 8am–9am | 87.9% | 2.6% | 382 |
| 9am–10am | 64.7% | 2.9% | 35 |
| 10am–11am | Limited data | 24 | |
| 11am–12pm | Limited data | 3 | |
| 12pm–1pm | 72.0% | 0.0% | 50 |
| 4pm–5pm | Limited data | 9 | |
| 5pm–6pm | Limited data | 4 | |
| 6pm–7pm | Limited data | 21 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on JFK 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) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 27 | ||
| Summer peak (Jun 15 - Aug 15) | 86.2% | -0.9 pts | 6.5% | 139 |
| All other days | 87.0% | — | 1.8% | 628 |
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).