Long Island MacArthur in June 2025

71.3%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In June 2025, reporting carriers scheduled 449 domestic departures from Long Island MacArthur (ISP). 71.3% left less than 15 minutes late and 71.0% reached their destination on time; 0.7% were cancelled.

Nationally that month, 71.4% of flights departed on time and 70.3% arrived on time, so ISP departures were level with the national departure figure.

A year earlier, in June 2024, the airport had 397 departures with 75.1% leaving on time: a change of −3.8 points, with flights up 13%.

Flights arriving at ISP that month were on time 68.2% of the time (449 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 49%, air carrier 24% and national aviation system 24%.

On time 71.0%
Arrived 15+ minutes late 28.1%
Cancelled 0.7%
Diverted 0.2%

Every scheduled departure from ISP in June 2025, judged by arrival at the destination.

June 2025 against a year earlier, the airport's year and the nation

Measure	Jun 2025	Jun 2024	ISP, 12 months to Jul 2026	All reported flights, Jun 2025
Departed on time	71.3%	75.1%	73.7%	71.4%
Arrived on time	71.0%	80.4%	73.6%	70.3%
Cancelled	0.7%	1.8%	2.1%	1.6%
Average departure delay (late minutes only)	27.5 min	18.1 min	18.8 min	22.1 min
Scheduled departures a day	15	13	14	20,386
Scheduled departures	449	397	4,966	611,575

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	285	63%	75.1%	8.9 min	0.0%
B6 JetBlue Airways	82	18%	73.2%	25.1 min	0.0%
F9 Frontier Airlines	82	18%	54.9%	40.7 min	3.7%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ISP–BWI	Islip to Baltimore	123	78.9%	6.0 min	0.0%
ISP–MCO	Islip to Orlando	116	67.2%	27.9 min	0.9%
ISP–PBI	Islip to West Palm Beach/Palm Beach	103	68.9%	13.9 min	0.0%
ISP–TPA	Islip to Tampa	38	60.5%	38.4 min	5.3%
ISP–MIA	Islip to Miami	30	73.3%	3.5 min	0.0%
ISP–FLL	Islip to Fort Lauderdale	22	72.7%	5.5 min	0.0%
ISP–MYR	Islip to Myrtle Beach	17	70.6%	47.9 min	0.0%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), June 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2025	Minutes
Air carrier	24.4%	31.6%	2,734
Late-arriving aircraft	48.8%	40.6%	5,468
National Aviation System	24.0%	20.9%	2,685
Extreme weather	2.7%	6.9%	301
Security	0.2%	0.2%	19

11,207 delay minutes on 126 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left ISP on time in June 2025?

71.3% of 449 scheduled domestic departures left less than 15 minutes late, and 71.0% reached their destination on time. The national figures that month were 71.4% and 70.3%.

How does that compare with a year earlier?

In June 2024, 75.1% of 397 departures left on time and 1.8% were cancelled, against 71.3% and 0.7% in June 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for June 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for ISP · methodology · corrections.