Long Island MacArthur in June 2026

77.3%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 June 2026, reporting carriers scheduled 415 domestic departures from Long Island MacArthur (ISP). 77.3% left less than 15 minutes late and 79.0% reached their destination on time; 0.7% were cancelled.

Nationally that month, 72.2% of flights departed on time and 72.8% arrived on time, so ISP departures were 5.1 points above the national departure figure.

A year earlier, in June 2025, the airport had 449 departures with 71.3% leaving on time: a change of +6.0 points, with flights down 8%.

Flights arriving at ISP that month were on time 78.3% of the time (415 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 42% and national aviation system 15%.

On time 79.0%
Arrived 15+ minutes late 19.8%
Cancelled 0.7%
Diverted 0.5%

Every scheduled departure from ISP in June 2026, judged by arrival at the destination.

June 2026 against a year earlier, the airport's year and the nation

Measure	Jun 2026	Jun 2025	ISP, 12 months to Jul 2026	All reported flights, Jun 2026
Departed on time	77.3%	71.3%	73.7%	72.2%
Arrived on time	79.0%	71.0%	73.6%	72.8%
Cancelled	0.7%	0.7%	2.1%	1.6%
Average departure delay (late minutes only)	17.8 min	27.5 min	18.8 min	20.6 min
Scheduled departures a day	14	15	14	20,253
Scheduled departures	415	449	4,966	607,577

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	230	55%	80.4%	3.1 min	0.4%
B6 JetBlue Airways	123	30%	82.1%	1.7 min	0.8%
F9 Frontier Airlines	62	15%	67.7%	19.2 min	1.6%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ISP–BWI	Islip to Baltimore	139	82.7%	0.6 min	0.7%
ISP–MCO	Islip to Orlando	118	74.6%	6.7 min	1.7%
ISP–PBI	Islip to West Palm Beach/Palm Beach	79	86.1%	7.6 min	0.0%
ISP–FLL	Islip to Fort Lauderdale	39	74.4%	-0.7 min	0.0%
ISP–TPA	Islip to Tampa	25	68.0%	15.2 min	0.0%
ISP–MYR	Islip to Myrtle Beach	15	73.3%	17.5 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), June 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2026	Minutes
Air carrier	41.7%	30.8%	2,574
Late-arriving aircraft	43.0%	42.1%	2,659
National Aviation System	15.0%	20.3%	925
Extreme weather	0.3%	6.7%	20
Security	0.0%	0.1%	0

6,178 delay minutes on 82 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 June 2026?

77.3% of 415 scheduled domestic departures left less than 15 minutes late, and 79.0% reached their destination on time. The national figures that month were 72.2% and 72.8%.

How does that compare with a year earlier?

In June 2025, 71.3% of 449 departures left on time and 0.7% were cancelled, against 77.3% and 0.7% in June 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for June 2026; 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.