Long Island MacArthur in July 2024

65.4%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 July 2024, reporting carriers scheduled 407 domestic departures from Long Island MacArthur (ISP). 65.4% left less than 15 minutes late and 72.5% reached their destination on time; 3.9% were cancelled.

Nationally that month, 68.5% of flights departed on time and 68.1% arrived on time, so ISP departures were 3.1 points below the national departure figure.

Flights arriving at ISP that month were on time 66.8% of the time (407 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 56%, air carrier 30% and national aviation system 14%.

On time 72.5%
Arrived 15+ minutes late 23.1%
Cancelled 3.9%
Diverted 0.5%

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

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

Measure	Jul 2024	Year earlier	ISP, 12 months to Jul 2026	All reported flights, Jul 2024
Departed on time	65.4%	—	73.7%	68.5%
Arrived on time	72.5%	—	73.6%	68.1%
Cancelled	3.9%	—	2.1%	2.9%
Average departure delay (late minutes only)	22.2 min	—	18.8 min	24.9 min
Scheduled departures a day	14	—	14	21,154
Scheduled departures	407	—	4,966	634,613

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	254	62%	72.4%	12.1 min	2.8%
F9 Frontier Airlines	153	38%	72.5%	4.0 min	5.9%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ISP–BWI	Islip to Baltimore	127	72.4%	14.3 min	3.1%
ISP–MCO	Islip to Orlando	102	65.7%	10.5 min	5.9%
ISP–PBI	Islip to West Palm Beach/Palm Beach	74	79.7%	6.6 min	1.4%
ISP–FLL	Islip to Fort Lauderdale	31	74.2%	-1.6 min	3.2%
ISP–MYR	Islip to Myrtle Beach	31	71.0%	4.8 min	9.7%
ISP–TPA	Islip to Tampa	29	72.4%	4.8 min	3.4%
ISP–ATL	Islip to Atlanta	13	84.6%	7.5 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), July 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2024	Minutes
Air carrier	29.5%	36.6%	2,023
Late-arriving aircraft	55.5%	42.7%	3,806
National Aviation System	13.5%	16.0%	926
Extreme weather	1.5%	4.6%	103
Security	0.0%	0.1%	0

6,858 delay minutes on 94 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 July 2024?

65.4% of 407 scheduled domestic departures left less than 15 minutes late, and 72.5% reached their destination on time. The national figures that month were 68.5% and 68.1%.

How does that compare with a year earlier?

July 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 July 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.