Charleston AFB/International in September 2025

84.8%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 1,881 domestic departures from Charleston AFB/International (CHS). 84.8% left less than 15 minutes late and 84.1% reached their destination on time; 0.3% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so CHS departures were 1.7 points above the national departure figure.

A year earlier, in September 2024, the airport had 2,200 departures with 85.7% leaving on time: a change of −0.9 points, with flights down 15%.

Flights arriving at CHS that month were on time 83.7% of the time (1,882 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 47%, national aviation system 31% and air carrier 19%.

On time 84.1%
Arrived 15+ minutes late 15.4%
Cancelled 0.3%
Diverted 0.2%

Every scheduled departure from CHS 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	CHS, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	84.8%	85.7%	77.8%	83.1%
Arrived on time	84.1%	85.5%	77.5%	82.8%
Cancelled	0.3%	0.6%	2.3%	0.5%
Average departure delay (late minutes only)	11.2 min	11.3 min	18.1 min	12.2 min
Scheduled departures a day	63	73	67	18,748
Scheduled departures	1,881	2,200	24,565	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	479	25%	81.4%	5.8 min	0.4%
DL Delta Air Lines	414	22%	87.7%	-4.2 min	0.2%
WN Southwest Airlines	269	14%	87.0%	-0.3 min	0.0%
YX Republic Airline	239	13%	82.0%	-1.9 min	1.3%
UA United Airlines	141	7%	85.1%	-1.7 min	0.0%
B6 JetBlue Airways	125	7%	75.2%	2.6 min	0.0%
MQ Envoy Air	47	2%	95.7%	-5.5 min	0.0%
OH PSA Airlines	46	2%	84.8%	-3.0 min	0.0%
OO SkyWest Airlines	40	2%	85.0%	0.5 min	0.0%
NK Spirit Airlines	34	2%	79.4%	11.9 min	0.0%
AS Alaska Airlines	30	2%	83.3%	3.6 min	0.0%
F9 Frontier Airlines	9	0%	77.8%	6.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CHS–ATL	Charleston to Atlanta	239	96.2%	-11.0 min	0.0%
CHS–CLT	Charleston to Charlotte	196	88.3%	-2.1 min	0.0%
CHS–DCA	Charleston to Washington	146	80.1%	9.0 min	0.7%
CHS–ORD	Charleston to Chicago	145	79.3%	3.5 min	0.0%
CHS–LGA	Charleston to New York	125	81.6%	-0.2 min	1.6%
CHS–PHL	Charleston to Philadelphia	109	80.7%	0.8 min	0.0%
CHS–EWR	Charleston to Newark	103	86.4%	-0.4 min	1.0%
CHS–BOS	Charleston to Boston	97	50.5%	19.8 min	0.0%
CHS–BWI	Charleston to Baltimore	90	88.9%	-2.2 min	0.0%
CHS–DTW	Charleston to Detroit	90	91.1%	-4.1 min	0.0%
CHS–BNA	Charleston to Nashville	73	80.8%	5.0 min	0.0%
CHS–DFW	Charleston to Dallas/Fort Worth	68	77.9%	9.3 min	1.5%

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), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	19.0%	34.3%	3,680
Late-arriving aircraft	46.6%	37.4%	9,003
National Aviation System	30.9%	22.6%	5,964
Extreme weather	3.4%	5.6%	657
Security	0.1%	0.1%	15

19,319 delay minutes on 290 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 CHS on time in September 2025?

84.8% of 1,881 scheduled domestic departures left less than 15 minutes late, and 84.1% 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, 85.7% of 2,200 departures left on time and 0.6% were cancelled, against 84.8% and 0.3% 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 CHS · methodology · corrections.