Nantucket Memorial in August 2024

74.1%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 474 domestic departures from Nantucket Memorial (ACK). 74.1% left less than 15 minutes late and 69.6% reached their destination on time; 8.9% were cancelled.

Nationally that month, 75.4% of flights departed on time and 74.7% arrived on time, so ACK departures were 1.3 points below the national departure figure.

A year earlier, in August 2023, the airport had 406 departures with 79.1% leaving on time: a change of −5.0 points, with flights up 17%.

Flights arriving at ACK that month were on time 77.0% of the time (474 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, national aviation system 35% and air carrier 20%.

On time 69.6%
Arrived 15+ minutes late 21.5%
Cancelled 8.9%
Diverted 0.0%

Every scheduled departure from ACK 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	ACK, 12 months to Jul 2026	All reported flights, Aug 2024
Departed on time	74.1%	79.1%	73.0%	75.4%
Arrived on time	69.6%	78.8%	69.6%	74.7%
Cancelled	8.9%	1.0%	5.3%	2.1%
Average departure delay (late minutes only)	23.2 min	20.0 min	20.9 min	18.4 min
Scheduled departures a day	16	14	5	20,634
Scheduled departures	474	406	1,690	619,025

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	240	51%	70.0%	18.7 min	7.1%
YX Republic Airline	218	46%	69.3%	15.4 min	11.5%
MQ Envoy Air	10	2%	50.0%	16.5 min	0.0%
OO SkyWest Airlines	6	1%	100.0%	-13.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ACK–LGA	Nantucket to New York	128	72.7%	5.8 min	11.7%
ACK–JFK	Nantucket to New York	93	65.6%	30.2 min	11.8%
ACK–DCA	Nantucket to Washington	90	68.9%	13.8 min	5.6%
ACK–HPN	Nantucket to White Plains	62	72.6%	14.9 min	6.5%
ACK–BOS	Nantucket to Boston	54	70.4%	13.6 min	5.6%
ACK–PHL	Nantucket to Philadelphia	31	64.5%	47.9 min	12.9%
ACK–ORD	Nantucket to Chicago	11	63.6%	2.5 min	0.0%
ACK–CLT	Nantucket to Charlotte	5	80.0%	11.2 min	0.0%

By scheduled departure hour

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	19.8%	33.8%	2,112
Late-arriving aircraft	44.1%	39.8%	4,694
National Aviation System	34.8%	20.4%	3,700
Extreme weather	1.1%	5.9%	113
Security	0.2%	0.1%	22

10,641 delay minutes on 102 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 ACK on time in August 2024?

74.1% of 474 scheduled domestic departures left less than 15 minutes late, and 69.6% 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, 79.1% of 406 departures left on time and 1.0% were cancelled, against 74.1% and 8.9% 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 ACK · methodology · corrections.