Orlando (MCO) to Islip (ISP): On-Time Performance
Data through May 2026
Orlando (MCO) to Islip (ISP) effectively runs on two schedules. In October 2024, 92% of arrivals were on time; in July 2025 that fell to 65% — a 27-point seasonal swing. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 60%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 3.9
- last 12 months
- Duration
- 2h 38m
- scheduled
- Distance
- 971 mi
Best airline from MCO to ISP
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 88% | 7 min | 0.8% | 589 |
| Frontier Airlines | 81% | 15 min | 1.7% | 881 |
| Southwest Airlines | 70% | 17 min | 1.2% | 1,345 |
Monthly on-time trend
Best time to fly from MCO to ISP
Aim for departures around 6 a.m. (94% on-time); avoid 8 p.m. departures (50%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 17 min |
| Tuesdaybest | 89% | 8 min |
| Wednesday | 81% | 11 min |
| Thursday | 73% | 17 min |
| Friday | 77% | 14 min |
| Saturday | 78% | 13 min |
| Sunday | 72% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft43%
- Airline operations35%
- National airspace system16%
- Weather6%
Frequently asked questions
- How often are flights from MCO to ISP delayed?
- 23% of MCO–ISP flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 14 minutes.
- Which airline is most reliable from MCO to ISP?
- JetBlue Airways has the best on-time record on this route at 88%, based on 589 flights. 3 airlines flew MCO–ISP frequently enough to compare in this period.
- What is the best time of day to fly from MCO to ISP?
- Departures around 6 a.m. have the best record (94% on-time), while departures around 8 p.m. have the worst (50%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MCO to ISP?
- The scheduled MCO–ISP flight time averages 2h 38m over 971 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are MCO to ISP flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from MCO to ISP?
- July 2025 was the roughest month in this dataset, with only 65% of arrivals on time. The best was October 2024 at 92%. If your dates are flexible, that 27-point gap is worth planning around.
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Based on 2,815 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.