Long Island MacArthur in October 2023

87.2%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 2023, reporting carriers scheduled 405 domestic departures from Long Island MacArthur (ISP). 87.2% left less than 15 minutes late and 89.4% reached their destination on time; 0.5% were cancelled.

Nationally that month, 83.8% of flights departed on time and 84.0% arrived on time, so ISP departures were 3.4 points above the national departure figure.

Flights arriving at ISP that month were on time 88.4% of the time (406 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 53%, air carrier 40% and national aviation system 7%.

On time 89.4%
Arrived 15+ minutes late 10.1%
Cancelled 0.5%
Diverted 0.0%

Every scheduled departure from ISP in October 2023, judged by arrival at the destination.

October 2023 against a year earlier, the airport's year and the nation

Measure	Oct 2023	Year earlier	ISP, 12 months to Jul 2026	All reported flights, Oct 2023
Departed on time	87.2%	—	73.7%	83.8%
Arrived on time	89.4%	—	73.6%	84.0%
Cancelled	0.5%	—	2.1%	0.4%
Average departure delay (late minutes only)	9.0 min	—	18.8 min	11.0 min
Scheduled departures a day	14	—	14	19,966
Scheduled departures	405	—	4,966	598,968

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	279	69%	90.3%	-4.6 min	0.0%
F9 Frontier Airlines	126	31%	87.3%	-2.4 min	1.6%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ISP–BWI	Islip to Baltimore	131	92.4%	-5.7 min	0.0%
ISP–MCO	Islip to Orlando	123	88.6%	-0.1 min	0.0%
ISP–TPA	Islip to Tampa	70	91.4%	-7.3 min	1.4%
ISP–PBI	Islip to West Palm Beach/Palm Beach	58	82.8%	-4.7 min	0.0%
ISP–MYR	Islip to Myrtle Beach	9	88.9%	8.8 min	0.0%
ISP–RDU	Islip to Raleigh/Durham	9	77.8%	-9.2 min	11.1%
ISP–BNA	Islip to Nashville	5	100.0%	-9.6 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 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Oct 2023	Minutes
Air carrier	39.7%	41.3%	1,091
Late-arriving aircraft	53.1%	40.5%	1,460
National Aviation System	6.7%	14.4%	185
Extreme weather	0.4%	3.7%	11
Security	0.0%	0.2%	0

2,747 delay minutes on 41 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 2023?

87.2% of 405 scheduled domestic departures left less than 15 minutes late, and 89.4% reached their destination on time. The national figures that month were 83.8% and 84.0%.

How does that compare with a year earlier?

October 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for October 2023; 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.