Best Time to Fly JFK to IAH: On-Time Stats by Hour & Airline
John F. Kennedy International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
413 flights were scheduled from New York (JFK) to Houston (IAH) in the last 12 months, and 74.7% of those that flew arrived on time, 2.9 points below the US average of 77.6%.
Delta Air Lines was the most punctual of the 2 airlines on the route at 83.7%, while JetBlue trailed at 57.7%.
September has been the best month (89% on time) and Thursday the weakest day of the week (70%).
3.6% of flights were cancelled, versus 1.8% nationally.
JFK to IAH 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 | 83.7% | 67 min | 3.7% | 269 |
| JetBlue | 57.7% | 71 min | 3.5% | 144 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly JFK to IAH
On-time arrival % by scheduled departure hour (local time), 719 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 84.1% | 0.0% | 44 |
| 7am–8am | 83.9% | 0.0% | 32 |
| 8am–9am | 76.0% | 3.0% | 401 |
| 9am–10am | Limited data | 23 | |
| 10am–11am | 92.5% | 0.0% | 53 |
| 11am–12pm | Limited data | 21 | |
| 12pm–1pm | 71.8% | 0.0% | 39 |
| 1pm–2pm | 63.6% | 0.0% | 45 |
| 2pm–3pm | 49.0% | 3.9% | 51 |
| 8pm–9pm | Limited data | 10 | |
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 IAH
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 | 18 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 29 | ||
| Summer peak (Jun 15 - Aug 15) | 58.2% | -20.9 pts | 4.6% | 109 |
| All other days | 79.2% | — | 1.4% | 563 |
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).