Cyril E King in December 2025

76.5%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 December 2025, reporting carriers scheduled 494 domestic departures from Cyril E King (STT). 76.5% left less than 15 minutes late and 80.4% reached their destination on time; 0.4% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so STT departures were 4.5 points above the national departure figure.

A year earlier, in December 2024, the airport had 483 departures with 80.7% leaving on time: a change of −4.2 points, with flights up 2%.

Flights arriving at STT that month were on time 76.7% of the time (494 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 48%, air carrier 43% and national aviation system 7%.

On time 80.4%
Arrived 15+ minutes late 18.2%
Cancelled 0.4%
Diverted 1.0%

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

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

Measure	Dec 2025	Dec 2024	STT, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	76.5%	80.7%	74.9%	72.0%
Arrived on time	80.4%	81.8%	75.9%	71.9%
Cancelled	0.4%	0.2%	2.1%	1.5%
Average departure delay (late minutes only)	24.1 min	15.7 min	21.9 min	21.2 min
Scheduled departures a day	17	16	15	19,410
Scheduled departures	494	483	5,548	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	212	43%	82.1%	10.7 min	0.5%
UA United Airlines	102	21%	92.2%	-11.9 min	0.0%
DL Delta Air Lines	83	17%	77.1%	0.4 min	1.2%
B6 JetBlue Airways	51	10%	66.7%	14.3 min	0.0%
NK Spirit Airlines	46	9%	67.4%	15.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STT–MIA	Charlotte Amalie to Miami	89	88.8%	-13.8 min	0.0%
STT–CLT	Charlotte Amalie to Charlotte	58	89.7%	-13.9 min	0.0%
STT–ATL	Charlotte Amalie to Atlanta	57	75.4%	1.7 min	1.8%
STT–SJU	Charlotte Amalie to San Juan	51	66.7%	14.3 min	0.0%
STT–IAD	Charlotte Amalie to Washington	45	88.9%	-7.1 min	0.0%
STT–JFK	Charlotte Amalie to New York	45	68.9%	60.3 min	2.2%
STT–ORD	Charlotte Amalie to Chicago	34	82.4%	4.8 min	0.0%
STT–EWR	Charlotte Amalie to Newark	31	96.8%	-18.6 min	0.0%
STT–FLL	Charlotte Amalie to Fort Lauderdale	23	69.6%	11.3 min	0.0%
STT–MCO	Charlotte Amalie to Orlando	23	65.2%	19.5 min	0.0%
STT–PHL	Charlotte Amalie to Philadelphia	14	57.1%	110.3 min	0.0%
STT–BOS	Charlotte Amalie to Boston	12	83.3%	-2.9 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	42.6%	33.3%	4,152
Late-arriving aircraft	48.1%	41.1%	4,690
National Aviation System	7.3%	19.1%	713
Extreme weather	1.7%	6.4%	169
Security	0.2%	0.2%	20

9,744 delay minutes on 90 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 December 2025?

76.5% of 494 scheduled domestic departures left less than 15 minutes late, and 80.4% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 80.7% of 483 departures left on time and 0.2% were cancelled, against 76.5% and 0.4% in December 2025.

Provenance

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