Cyril E King in September 2025

83.3%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 September 2025, reporting carriers scheduled 162 domestic departures from Cyril E King (STT). 83.3% left less than 15 minutes late and 84.6% reached their destination on time; 0.0% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so STT departures were level with the national departure figure.

A year earlier, in September 2024, the airport had 232 departures with 84.9% leaving on time: a change of −1.6 points, with flights down 30%.

Flights arriving at STT that month were on time 81.5% of the time (162 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 57%, late-arriving aircraft 36% and national aviation system 8%.

On time 84.6%
Arrived 15+ minutes late 14.2%
Cancelled 0.0%
Diverted 1.2%

Every scheduled departure from STT in September 2025, judged by arrival at the destination.

September 2025 against a year earlier, the airport's year and the nation

Measure	Sep 2025	Sep 2024	STT, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	83.3%	84.9%	74.9%	83.1%
Arrived on time	84.6%	84.5%	75.9%	82.8%
Cancelled	0.0%	0.4%	2.1%	0.5%
Average departure delay (late minutes only)	15.0 min	16.4 min	21.9 min	12.2 min
Scheduled departures a day	5	8	15	18,748
Scheduled departures	162	232	5,548	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	58	36%	79.3%	-4.5 min	0.0%
NK Spirit Airlines	38	23%	94.7%	-19.9 min	0.0%
DL Delta Air Lines	34	21%	94.1%	18.9 min	0.0%
B6 JetBlue Airways	22	14%	68.2%	7.1 min	0.0%
UA United Airlines	10	6%	80.0%	-18.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STT–MIA	Charlotte Amalie to Miami	51	78.4%	-1.6 min	0.0%
STT–ATL	Charlotte Amalie to Atlanta	34	94.1%	18.9 min	0.0%
STT–FLL	Charlotte Amalie to Fort Lauderdale	26	96.2%	-24.3 min	0.0%
STT–SJU	Charlotte Amalie to San Juan	22	68.2%	7.1 min	0.0%
STT–MCO	Charlotte Amalie to Orlando	12	91.7%	-10.4 min	0.0%
STT–CLT	Charlotte Amalie to Charlotte	5	80.0%	-27.0 min	0.0%
STT–EWR	Charlotte Amalie to Newark	5	80.0%	-19.7 min	0.0%
STT–IAD	Charlotte Amalie to Washington	4	75.0%	-8.7 min	0.0%
STT–JFK	Charlotte Amalie to New York	2	100.0%	-19.5 min	0.0%
STT–IAH	Charlotte Amalie to Houston	1	100.0%	-53.0 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 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	56.5%	34.3%	1,207
Late-arriving aircraft	35.7%	37.4%	762
National Aviation System	7.8%	22.6%	167
Extreme weather	0.0%	5.6%	0
Security	0.0%	0.1%	0

2,136 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 STT on time in September 2025?

83.3% of 162 scheduled domestic departures left less than 15 minutes late, and 84.6% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 84.9% of 232 departures left on time and 0.4% were cancelled, against 83.3% and 0.0% in September 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; 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.