Best Time to Fly ISP to MCO: On-Time Stats by Hour & Airline
Long Island MacArthur → Orlando International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.5% of Islip (ISP) to Orlando (MCO) flights arrived on time (1,424 scheduled flights). That is 4.2 points below the national average of 77.6%.
JetBlue was the most punctual of the 3 airlines on the route at 75.5%, while Frontier Airlines trailed at 71.7%.
October has been the best month (87% on time) and Sunday the weakest day of the week (69%).
2.0% of flights were cancelled, versus 1.8% nationally.
ISP to MCO 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 |
|---|---|---|---|---|
| JetBlue | 75.5% | 85 min | 1.8% | 392 |
| Southwest Airlines | 73.2% | 58 min | 1.5% | 668 |
| Frontier Airlines | 71.7% | 86 min | 3.0% | 364 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ISP to MCO
On-time arrival % by scheduled departure hour (local time), 2,850 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.2% | 1.6% | 191 |
| 6am–7am | 88.0% | 1.1% | 269 |
| 7am–8am | 88.7% | 0.0% | 115 |
| 8am–9am | 84.5% | 1.7% | 60 |
| 9am–10am | 82.6% | 3.5% | 197 |
| 10am–11am | 77.6% | 1.0% | 207 |
| 11am–12pm | 81.7% | 0.7% | 276 |
| 12pm–1pm | 82.0% | 1.1% | 186 |
| 1pm–2pm | 72.6% | 2.0% | 151 |
| 2pm–3pm | 78.2% | 0.0% | 55 |
| 3pm–4pm | 62.0% | 1.1% | 94 |
| 4pm–5pm | 70.5% | 0.4% | 252 |
| 5pm–6pm | 55.9% | 2.4% | 211 |
| 6pm–7pm | 51.7% | 1.0% | 209 |
| 7pm–8pm | 67.7% | 0.0% | 95 |
| 8pm–9pm | 60.8% | 4.5% | 155 |
| 9pm–10pm | 72.1% | 0.8% | 123 |
| 10pm–11pm | Limited data | 4 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ISP to MCO
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) | 72.9% | -5.8 pts | 0.0% | 59 |
| Christmas & New Year (Dec 20 - Jan 3) | 59.9% | -18.8 pts | 3.5% | 142 |
| Summer peak (Jun 15 - Aug 15) | 62.5% | -16.2 pts | 1.2% | 485 |
| All other days | 78.7% | — | 1.3% | 2,164 |
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).