Cyril E King in September 2024

84.9%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 232 domestic departures from Cyril E King (STT). 84.9% left less than 15 minutes late and 84.5% reached their destination on time; 0.4% were cancelled.

Nationally that month, 84.4% of flights departed on time and 83.9% arrived on time, so STT departures were 0.5 points above the national departure figure.

A year earlier, in September 2023, the airport had 207 departures with 77.3% leaving on time: a change of +7.6 points, with flights up 12%.

Flights arriving at STT that month were on time 84.4% of the time (231 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 52%, air carrier 39% and national aviation system 6%.

On time 84.5%
Arrived 15+ minutes late 13.8%
Cancelled 0.4%
Diverted 1.3%

Every scheduled departure from STT 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	STT, 12 months to Jul 2026	All reported flights, Sep 2024
Departed on time	84.9%	77.3%	74.9%	84.4%
Arrived on time	84.5%	75.8%	75.9%	83.9%
Cancelled	0.4%	0.5%	2.1%	0.6%
Average departure delay (late minutes only)	16.4 min	18.8 min	21.9 min	10.6 min
Scheduled departures a day	8	7	15	19,421
Scheduled departures	232	207	5,548	582,622

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
NK Spirit Airlines	70	30%	85.7%	-9.6 min	0.0%
AA American Airlines	66	28%	83.3%	-2.3 min	0.0%
B6 JetBlue Airways	49	21%	75.5%	31.4 min	2.0%
DL Delta Air Lines	34	15%	94.1%	-5.5 min	0.0%
UA United Airlines	13	6%	92.3%	-29.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STT–MIA	Charlotte Amalie to Miami	53	83.0%	-0.7 min	0.0%
STT–SJU	Charlotte Amalie to San Juan	49	75.5%	31.4 min	2.0%
STT–FLL	Charlotte Amalie to Fort Lauderdale	40	85.0%	-10.9 min	0.0%
STT–ATL	Charlotte Amalie to Atlanta	34	94.1%	-5.5 min	0.0%
STT–MCO	Charlotte Amalie to Orlando	30	86.7%	-7.8 min	0.0%
STT–CLT	Charlotte Amalie to Charlotte	10	80.0%	1.9 min	0.0%
STT–EWR	Charlotte Amalie to Newark	5	80.0%	-3.5 min	0.0%
STT–IAD	Charlotte Amalie to Washington	4	100.0%	-26.7 min	0.0%
STT–IAH	Charlotte Amalie to Houston	4	100.0%	-58.7 min	0.0%
STT–JFK	Charlotte Amalie to New York	3	100.0%	-43.0 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	39.3%	38.6%	1,415
Late-arriving aircraft	52.3%	38.4%	1,884
National Aviation System	6.0%	18.2%	215
Extreme weather	2.4%	4.8%	85
Security	0.0%	0.1%	0

3,599 delay minutes on 32 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 STT on time in September 2024?

84.9% of 232 scheduled domestic departures left less than 15 minutes late, and 84.5% 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, 77.3% of 207 departures left on time and 0.5% were cancelled, against 84.9% and 0.4% 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 STT · methodology · corrections.