Best Time to Fly IAH to JFK: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → John F. Kennedy International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 68.0% of Houston (IAH) to New York (JFK) flights arrived on time (413 scheduled flights). That is 9.6 points below the national average of 77.6%.
Among 2 airlines, Delta Air Lines led with 78.9% on time and JetBlue was last with 46.5%.
Over 24 months, Tuesday was the most reliable day (79% on time) and July the worst month (26%).
The cancellation rate was 5.3% (US average 1.8%).
IAH to JFK 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 | 78.9% | 86 min | 4.1% | 269 |
| JetBlue | 46.5% | 136 min | 7.6% | 144 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to JFK
On-time arrival % by scheduled departure hour (local time), 719 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 11 | |
| 9am–10am | 73.5% | 0.0% | 34 |
| 10am–11am | Limited data | 10 | |
| 11am–12pm | 53.1% | 6.7% | 105 |
| 12pm–1pm | 78.3% | 3.4% | 327 |
| 1pm–2pm | 63.6% | 2.9% | 34 |
| 2pm–3pm | 77.8% | 3.6% | 56 |
| 3pm–4pm | 73.0% | 0.0% | 38 |
| 4pm–5pm | Limited data | 8 | |
| 5pm–6pm | 62.2% | 0.0% | 45 |
| 6pm–7pm | 40.9% | 7.8% | 51 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on IAH to JFK
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 | 19 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 29 | ||
| Summer peak (Jun 15 - Aug 15) | 44.2% | -29.8 pts | 9.2% | 109 |
| All other days | 74.0% | — | 2.1% | 562 |
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).