Long Island MacArthur in April 2024

76.2%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 April 2024, reporting carriers scheduled 433 domestic departures from Long Island MacArthur (ISP). 76.2% left less than 15 minutes late and 79.4% reached their destination on time; 2.1% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.2% arrived on time, so ISP departures were 4.3 points below the national departure figure.

Flights arriving at ISP that month were on time 75.3% of the time (433 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 47%, air carrier 23% and national aviation system 19%.

On time 79.4%
Arrived 15+ minutes late 18.2%
Cancelled 2.1%
Diverted 0.2%

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

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

Measure	Apr 2024	Year earlier	ISP, 12 months to Jul 2026	All reported flights, Apr 2024
Departed on time	76.2%	—	73.7%	80.5%
Arrived on time	79.4%	—	73.6%	80.2%
Cancelled	2.1%	—	2.1%	0.7%
Average departure delay (late minutes only)	20.4 min	—	18.8 min	14.2 min
Scheduled departures a day	14	—	14	19,406
Scheduled departures	433	—	4,966	582,185

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	250	58%	82.4%	8.9 min	0.4%
F9 Frontier Airlines	183	42%	75.4%	2.6 min	4.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ISP–MCO	Islip to Orlando	118	78.0%	13.0 min	2.5%
ISP–BWI	Islip to Baltimore	111	84.7%	5.6 min	0.0%
ISP–PBI	Islip to West Palm Beach/Palm Beach	91	80.2%	0.9 min	2.2%
ISP–TPA	Islip to Tampa	44	72.7%	7.8 min	4.5%
ISP–FLL	Islip to Fort Lauderdale	30	86.7%	-16.9 min	3.3%
ISP–MYR	Islip to Myrtle Beach	21	61.9%	23.1 min	4.8%
ISP–RSW	Islip to Fort Myers	18	77.8%	9.4 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), April 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2024	Minutes
Air carrier	23.4%	33.6%	1,751
Late-arriving aircraft	46.6%	41.0%	3,493
National Aviation System	18.8%	20.0%	1,411
Extreme weather	11.2%	5.1%	839
Security	0.0%	0.2%	0

7,494 delay minutes on 79 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 April 2024?

76.2% of 433 scheduled domestic departures left less than 15 minutes late, and 79.4% reached their destination on time. The national figures that month were 80.5% and 80.2%.

How does that compare with a year earlier?

April 2023 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 April 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.