Cyril E King in August 2025

70.7%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 2025, reporting carriers scheduled 351 domestic departures from Cyril E King (STT). 70.7% left less than 15 minutes late and 70.7% reached their destination on time; 6.8% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so STT departures were 6.1 points below the national departure figure.

A year earlier, in August 2024, the airport had 412 departures with 69.9% leaving on time: a change of +0.8 points, with flights down 15%.

Flights arriving at STT that month were on time 71.4% of the time (350 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 49%, air carrier 38% and national aviation system 11%.

On time 70.7%
Arrived 15+ minutes late 19.4%
Cancelled 6.8%
Diverted 3.1%

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

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

Measure	Aug 2025	Aug 2024	STT, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	70.7%	69.9%	74.9%	76.8%
Arrived on time	70.7%	67.2%	75.9%	76.3%
Cancelled	6.8%	1.9%	2.1%	1.1%
Average departure delay (late minutes only)	27.0 min	30.5 min	21.9 min	17.6 min
Scheduled departures a day	12	14	15	20,079
Scheduled departures	351	412	5,548	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	134	38%	76.9%	-8.3 min	6.7%
NK Spirit Airlines	80	23%	67.5%	1.4 min	5.0%
UA United Airlines	49	14%	71.4%	27.9 min	10.2%
DL Delta Air Lines	46	13%	60.9%	32.2 min	8.7%
B6 JetBlue Airways	36	10%	69.4%	14.2 min	5.6%
F9 Frontier Airlines	6	2%	50.0%	175.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STT–MIA	Charlotte Amalie to Miami	60	81.7%	-8.8 min	5.0%
STT–MCO	Charlotte Amalie to Orlando	48	68.8%	1.8 min	4.2%
STT–SJU	Charlotte Amalie to San Juan	42	66.7%	38.4 min	4.8%
STT–ATL	Charlotte Amalie to Atlanta	39	61.5%	35.9 min	7.7%
STT–JFK	Charlotte Amalie to New York	38	68.4%	-0.7 min	7.9%
STT–CLT	Charlotte Amalie to Charlotte	32	78.1%	-15.5 min	9.4%
STT–FLL	Charlotte Amalie to Fort Lauderdale	32	65.6%	0.7 min	6.3%
STT–IAD	Charlotte Amalie to Washington	20	65.0%	-3.6 min	10.0%
STT–IAH	Charlotte Amalie to Houston	18	72.2%	-15.3 min	11.1%
STT–EWR	Charlotte Amalie to Newark	8	87.5%	-27.0 min	12.5%
STT–DFW	Charlotte Amalie to Dallas/Fort Worth	6	83.3%	5.5 min	0.0%
STT–PHL	Charlotte Amalie to Philadelphia	5	40.0%	-6.0 min	20.0%

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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	38.3%	33.1%	2,944
Late-arriving aircraft	49.0%	40.5%	3,764
National Aviation System	11.2%	19.2%	863
Extreme weather	1.2%	7.0%	89
Security	0.3%	0.1%	24

7,684 delay minutes on 68 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 August 2025?

70.7% of 351 scheduled domestic departures left less than 15 minutes late, and 70.7% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 69.9% of 412 departures left on time and 1.9% were cancelled, against 70.7% and 6.8% in August 2025.

Provenance

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