ISP to MCO flight delays
Islip, NY (ISP) Orlando, FL (MCO) · 971 miles
1,428 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
72.79%
Arrived on time
Within 15 minutes of schedule
1.89%
Cancelled
Share of scheduled flights
75 min
When late, late by
Average across delayed arrivals
22 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In October it ran 21.3 points more punctual than in August — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The 3 airlines here are separated by under 5 points — close enough to call a tie. Choose on price and departure time.
Flights from Islip to Orlando run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over January 2025 – August 2026, JetBlue Airways arrived on time most often on ISP to MCO. Frontier Airlines was late most often. Flights ran closest to schedule in October and worst in August.
Every airline on ISP to MCO
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 678 | 73.42% | 1.47% | 62 min | D |
| Frontier Airlines | 376 | 69.89% | 2.93% | 97 min | D |
| JetBlue Airways | 374 | 74.52% | 1.6% | 75 min | D |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
MCO to ISP Orlando back to Islip 74.77% on time DCommon questions
Are flights from Islip to Orlando usually delayed?
72.79% of flights on the ISP to MCO route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airline is most on time from Islip to Orlando?
JetBlue Airways, at 74.52% on time across 374 flights. The least punctual on the route was Frontier Airlines at 69.89%.
How often are ISP to MCO flights cancelled?
1.89% of scheduled flights did not operate — about 19 in every thousand. That is in the normal range.
What is the best month to fly Islip to Orlando?
October, when 82% of flights arrived on time. The worst was August at 60.7%.
When ISP to MCO flights are late, how late are they?
About 75 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on ISP to MCO during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →