Historical on-time performance
Orlando to Islip
972 miData through Dec 2025Source: US DOT · BTS
Flights on MCO–ISP arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 1,444 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- JetBlue AirwaysbestOn-time87%Medianon timep9020 minCancel0.0%Flights341
- Southwest AirlinesOn-time70%Medianon timep9050 minCancel0.3%Flights679
- Frontier AirlinesOn-time78%Medianon timep9050 minCancel1.2%Flights424
Why flights run late
Delay causes
- Airline35%
- Weather7%
- Air traffic (NAS)16%
- Late aircraft42%
- Security1%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly MCO → ISP
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 90% on time.
- Mornings90% on time · p90 10 min · 1,729 flights
- Middays74% on time · p90 50 min · 778 flights
- Afternoons65% on time · p90 70 min · 442 flights
- Evenings59% on time · p90 75 min · 651 flights
- Overnights58% on time · p90 85 min · 637 flights
Best day of week
Tuesdays are the most reliable day to fly this route — 83% on time.
- Tuesdays83% on time · p90 30 min · 572 flights
- Wednesdays76% on time · p90 45 min · 559 flights
- Saturdays75% on time · p90 50 min · 658 flights
- Fridays74% on time · p90 45 min · 606 flights
- Thursdays74% on time · p90 50 min · 605 flights
- Mondays73% on time · p90 50 min · 616 flights
- Sundays70% on time · p90 65 min · 621 flights
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