ISP Today
Pick Your Window
Afternoon vs Early Morning is a 78-point swing at ISP. The afternoon block runs at 78%. If you have any say in your departure time, this is the biggest thing you can control.
Through the Day
vs Last Week
Tracking about the same as last week. Departures at 61%, last week 63%. Arrivals down 24 points too. Sat was the worst day, Mon the best.
The Bigger Picture
ISP has been bouncing between 40% and 100%. Best day was Feb 18 at 100%. Worst was Feb 16 at 40%. The norm is 63-69%, which is just how ISP runs.
About ISP Delays
Long Island MacArthur Airport has averaged 61% on-time departures this week, making it frequently delayed. Performance varies by time of day and weather conditions.
Long Island MacArthur Airport is one of 179 FAA-monitored US airports with real-time delay tracking. Data includes departure and arrival on-time percentages, updated every 5 minutes, with historical trends available for the past 90 days.
Nearby alternatives include JFK (John F. Kennedy International Airport), HPN (Westchester County Airport), LGA (LaGuardia Airport), EWR (Newark Liberty International Airport) and SWF (New York Stewart International Airport). When ISP is experiencing delays, these airports may offer better on-time performance.
Early morning departures from Long Island MacArthur Airport typically have the highest on-time rates. Delays tend to accumulate throughout the day as cascading effects from earlier disruptions compound. Check the 24-hour trend chart above for today's pattern.