Nantucket Memorial in September 2024

88.6%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 September 2024, reporting carriers scheduled 175 domestic departures from Nantucket Memorial (ACK). 88.6% left less than 15 minutes late and 86.3% reached their destination on time; 0.6% were cancelled.

Nationally that month, 84.4% of flights departed on time and 83.9% arrived on time, so ACK departures were 4.2 points above the national departure figure.

A year earlier, in September 2023, the airport had 231 departures with 68.8% leaving on time: a change of +19.8 points, with flights down 24%.

Flights arriving at ACK that month were on time 92.6% of the time (175 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 66%, national aviation system 26% and air carrier 8%.

On time 86.3%
Arrived 15+ minutes late 13.1%
Cancelled 0.6%
Diverted 0.0%

Every scheduled departure from ACK in September 2024, judged by arrival at the destination.

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

Measure	Sep 2024	Sep 2023	ACK, 12 months to Jul 2026	All reported flights, Sep 2024
Departed on time	88.6%	68.8%	73.0%	84.4%
Arrived on time	86.3%	68.0%	69.6%	83.9%
Cancelled	0.6%	9.5%	5.3%	0.6%
Average departure delay (late minutes only)	7.9 min	21.4 min	20.9 min	10.6 min
Scheduled departures a day	6	8	5	19,421
Scheduled departures	175	231	1,690	582,622

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	158	90%	86.1%	-2.6 min	0.6%
YX Republic Airline	17	10%	88.2%	-1.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ACK–LGA	Nantucket to New York	37	91.9%	-5.9 min	0.0%
ACK–DCA	Nantucket to Washington	35	82.9%	2.4 min	0.0%
ACK–JFK	Nantucket to New York	35	91.4%	-4.6 min	2.9%
ACK–HPN	Nantucket to White Plains	33	97.0%	-13.0 min	0.0%
ACK–BOS	Nantucket to Boston	32	65.6%	9.2 min	0.0%
ACK–PHL	Nantucket to Philadelphia	3	100.0%	-2.7 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), September 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2024	Minutes
Air carrier	8.1%	38.6%	120
Late-arriving aircraft	66.1%	38.4%	974
National Aviation System	25.7%	18.2%	379
Extreme weather	0.0%	4.8%	0
Security	0.1%	0.1%	1

1,474 delay minutes on 23 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 September 2024?

88.6% of 175 scheduled domestic departures left less than 15 minutes late, and 86.3% reached their destination on time. The national figures that month were 84.4% and 83.9%.

How does that compare with a year earlier?

In September 2023, 68.8% of 231 departures left on time and 9.5% were cancelled, against 88.6% and 0.6% in September 2024.

Provenance

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