Long Island MacArthur in October 2025

80.5%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 October 2025, reporting carriers scheduled 365 domestic departures from Long Island MacArthur (ISP). 80.5% left less than 15 minutes late and 83.8% reached their destination on time; 0.5% were cancelled.

Nationally that month, 80.0% of flights departed on time and 79.1% arrived on time, so ISP departures were 0.5 points above the national departure figure.

A year earlier, in October 2024, the airport had 269 departures with 79.9% leaving on time: a change of +0.6 points, with flights up 36%.

Flights arriving at ISP that month were on time 83.0% of the time (364 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 35%, air carrier 29% and national aviation system 25%.

On time 83.8%
Arrived 15+ minutes late 15.1%
Cancelled 0.5%
Diverted 0.5%

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

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

Measure	Oct 2025	Oct 2024	ISP, 12 months to Jul 2026	All reported flights, Oct 2025
Departed on time	80.5%	79.9%	73.7%	80.0%
Arrived on time	83.8%	87.0%	73.6%	79.1%
Cancelled	0.5%	3.7%	2.1%	0.5%
Average departure delay (late minutes only)	13.8 min	9.3 min	18.8 min	13.9 min
Scheduled departures a day	12	9	14	20,195
Scheduled departures	365	269	4,966	605,844

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	204	56%	86.8%	2.9 min	0.0%
B6 JetBlue Airways	83	23%	79.5%	-0.8 min	0.0%
F9 Frontier Airlines	78	21%	80.8%	2.3 min	2.6%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ISP–MCO	Islip to Orlando	111	82.0%	5.7 min	0.0%
ISP–BWI	Islip to Baltimore	93	89.2%	2.2 min	0.0%
ISP–PBI	Islip to West Palm Beach/Palm Beach	93	79.6%	2.8 min	0.0%
ISP–TPA	Islip to Tampa	30	83.3%	-9.5 min	6.7%
ISP–FLL	Islip to Fort Lauderdale	21	85.7%	-0.8 min	0.0%
ISP–MYR	Islip to Myrtle Beach	17	88.2%	-5.9 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), October 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Oct 2025	Minutes
Air carrier	29.3%	34.0%	1,119
Late-arriving aircraft	35.4%	39.7%	1,352
National Aviation System	25.1%	22.9%	956
Extreme weather	10.1%	3.3%	387
Security	0.0%	0.1%	0

3,814 delay minutes on 55 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 October 2025?

80.5% of 365 scheduled domestic departures left less than 15 minutes late, and 83.8% reached their destination on time. The national figures that month were 80.0% and 79.1%.

How does that compare with a year earlier?

In October 2024, 79.9% of 269 departures left on time and 3.7% were cancelled, against 80.5% and 0.5% in October 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for October 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.