Long Island MacArthur in August 2024

67.2%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 August 2024, reporting carriers scheduled 378 domestic departures from Long Island MacArthur (ISP). 67.2% left less than 15 minutes late and 64.3% reached their destination on time; 3.2% were cancelled.

Nationally that month, 75.4% of flights departed on time and 74.7% arrived on time, so ISP departures were 8.2 points below the national departure figure.

A year earlier, in August 2023, the airport had 381 departures with 70.1% leaving on time: a change of −2.9 points, with flights down 1%.

Flights arriving at ISP that month were on time 67.2% of the time (378 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 49%, national aviation system 30% and air carrier 20%.

On time 64.3%
Arrived 15+ minutes late 32.3%
Cancelled 3.2%
Diverted 0.3%

Every scheduled departure from ISP in August 2024, judged by arrival at the destination.

August 2024 against a year earlier, the airport's year and the nation

Measure	Aug 2024	Aug 2023	ISP, 12 months to Jul 2026	All reported flights, Aug 2024
Departed on time	67.2%	70.1%	73.7%	75.4%
Arrived on time	64.3%	74.3%	73.6%	74.7%
Cancelled	3.2%	4.2%	2.1%	2.1%
Average departure delay (late minutes only)	26.9 min	19.9 min	18.8 min	18.4 min
Scheduled departures a day	13	13	14	20,634
Scheduled departures	378	381	4,966	619,025

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	228	60%	68.0%	18.1 min	0.4%
F9 Frontier Airlines	150	40%	58.7%	20.9 min	7.3%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ISP–MCO	Islip to Orlando	119	61.3%	19.0 min	0.8%
ISP–BWI	Islip to Baltimore	100	75.0%	21.7 min	0.0%
ISP–PBI	Islip to West Palm Beach/Palm Beach	55	58.2%	22.9 min	1.8%
ISP–FLL	Islip to Fort Lauderdale	36	63.9%	20.3 min	2.8%
ISP–TPA	Islip to Tampa	36	69.4%	6.0 min	5.6%
ISP–MYR	Islip to Myrtle Beach	22	45.5%	22.5 min	22.7%
ISP–ATL	Islip to Atlanta	10	50.0%	10.5 min	20.0%

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), August 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2024	Minutes
Air carrier	19.7%	33.8%	1,879
Late-arriving aircraft	49.1%	39.8%	4,679
National Aviation System	29.9%	20.4%	2,850
Extreme weather	1.2%	5.9%	118
Security	0.0%	0.1%	0

9,526 delay minutes on 122 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 August 2024?

67.2% of 378 scheduled domestic departures left less than 15 minutes late, and 64.3% reached their destination on time. The national figures that month were 75.4% and 74.7%.

How does that compare with a year earlier?

In August 2023, 70.1% of 381 departures left on time and 4.2% were cancelled, against 67.2% and 3.2% in August 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2024; 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.