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How Busy Is Long Island Mac Arthur Airport? ISP
Islip, United States. Departures peak at 10:00 local, averaging 3 flights per hour.
Window: last 60 days. Last refreshed: 2026-10-06. Schedule coverage: 7 days observed.
Peak departure hour
10:00
3 flights/hr
Quietest active hour
09:00
1 flights/hr
Traffic score
85/100
Relative volume
Departures by hour (local time)
Avg per day, last 60 daysTotal: 25 avg departures per day.
Weekday vs weekend departure pattern
Weekday avg per hour
Weekend avg per hour
Arrivals by hour (local time)
Avg per day, last 60 daysPeak arrival hour: 16:00 local (2.6 flights/hr). Total: 23.7 avg arrivals/day.
Top airlines
- 1. Southwest Airlines (WN) 27
- 2. Breeze Aviation Group (MX) 20
- 3. Hyannis Air Service, Inc. d/b/a Cape Air (9K) 12
- 4. Jetblue Airways (B6) 12
- 5. Frontier Airlines, (F9) 9
Top destinations
- 1. 🇺🇸 Orlando (MCO) 20
- 2. 🇺🇸 Baltimore (BWI) 15
- 3. 🇺🇸 Boston (BOS) 12
- 4. 🇺🇸 West Palm Beach (DJT) 9
- 5. 🇺🇸 Tampa (TPA) 5
Frequently asked
- What's the busiest hour for departures at ISP?
- Departures from Long Island Mac Arthur Airport peak at 10:00 local time, averaging 3 flights per hour over the past 60 days.
- What's the quietest hour to fly out of ISP?
- The quietest hour with regular service is 09:00 local time, averaging 1 flights per hour.
- Which airline operates the most flights from ISP?
- Southwest Airlines (WN) is the largest operator at Long Island Mac Arthur Airport, with 27 observed departures in the past 60 days.
- What's the most popular destination from ISP?
- Orlando (MCO) is the most-flown destination, with 20 observed departures in the past 60 days.
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