Nantucket Memorial in July 2024

70.6%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 July 2024, reporting carriers scheduled 479 domestic departures from Nantucket Memorial (ACK). 70.6% left less than 15 minutes late and 69.3% reached their destination on time; 5.4% were cancelled.

Nationally that month, 68.5% of flights departed on time and 68.1% arrived on time, so ACK departures were 2.1 points above the national departure figure.

Flights arriving at ACK that month were on time 75.8% of the time (479 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 46%, national aviation system 31% and air carrier 22%.

On time 69.3%
Arrived 15+ minutes late 25.1%
Cancelled 5.4%
Diverted 0.2%

Every scheduled departure from ACK 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	ACK, 12 months to Jul 2026	All reported flights, Jul 2024
Departed on time	70.6%	—	73.0%	68.5%
Arrived on time	69.3%	—	69.6%	68.1%
Cancelled	5.4%	—	5.3%	2.9%
Average departure delay (late minutes only)	20.7 min	—	20.9 min	24.9 min
Scheduled departures a day	16	—	5	21,154
Scheduled departures	479	—	1,690	634,613

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	238	50%	73.9%	10.9 min	2.9%
YX Republic Airline	225	47%	64.4%	13.0 min	8.0%
MQ Envoy Air	8	2%	62.5%	34.3 min	0.0%
OO SkyWest Airlines	8	2%	75.0%	-5.1 min	12.5%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ACK–LGA	Nantucket to New York	128	66.4%	13.0 min	7.8%
ACK–DCA	Nantucket to Washington	97	71.1%	11.3 min	3.1%
ACK–JFK	Nantucket to New York	93	62.4%	22.3 min	5.4%
ACK–HPN	Nantucket to White Plains	62	79.0%	6.3 min	3.2%
ACK–BOS	Nantucket to Boston	52	80.8%	-0.6 min	3.8%
ACK–PHL	Nantucket to Philadelphia	31	58.1%	10.9 min	9.7%
ACK–ORD	Nantucket to Chicago	12	66.7%	16.4 min	8.3%
ACK–CLT	Nantucket to Charlotte	4	75.0%	14.5 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), July 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2024	Minutes
Air carrier	22.1%	36.6%	2,133
Late-arriving aircraft	45.8%	42.7%	4,433
National Aviation System	30.5%	16.0%	2,951
Extreme weather	1.4%	4.6%	132
Security	0.2%	0.1%	24

9,673 delay minutes on 120 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 July 2024?

70.6% of 479 scheduled domestic departures left less than 15 minutes late, and 69.3% 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 ACK · methodology · corrections.