Charleston AFB/International in December 2025

74.4%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 2,030 domestic departures from Charleston AFB/International (CHS). 74.4% left less than 15 minutes late and 74.3% reached their destination on time; 1.9% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so CHS departures were 2.4 points above the national departure figure.

A year earlier, in December 2024, the airport had 1,945 departures with 80.2% leaving on time: a change of −5.8 points, with flights up 4%.

Flights arriving at CHS that month were on time 69.1% of the time (2,029 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 50%, air carrier 32% and national aviation system 17%.

On time 74.3%
Arrived 15+ minutes late 23.6%
Cancelled 1.9%
Diverted 0.2%

Every scheduled departure from CHS 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	CHS, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	74.4%	80.2%	77.8%	72.0%
Arrived on time	74.3%	79.1%	77.5%	71.9%
Cancelled	1.9%	0.6%	2.3%	1.5%
Average departure delay (late minutes only)	21.8 min	14.9 min	18.1 min	21.2 min
Scheduled departures a day	68	65	67	19,410
Scheduled departures	2,030	1,945	24,565	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	386	19%	79.3%	14.0 min	3.1%
AA American Airlines	340	17%	79.7%	4.4 min	0.3%
WN Southwest Airlines	271	13%	81.9%	-0.1 min	0.7%
YX Republic Airline	260	13%	69.2%	13.2 min	2.3%
OH PSA Airlines	220	11%	62.7%	37.0 min	2.7%
UA United Airlines	169	8%	72.2%	17.2 min	1.8%
MQ Envoy Air	134	7%	86.6%	-1.1 min	0.0%
B6 JetBlue Airways	133	7%	60.9%	23.8 min	3.8%
NK Spirit Airlines	48	2%	56.3%	17.4 min	6.3%
AS Alaska Airlines	31	2%	54.8%	15.6 min	0.0%
OO SkyWest Airlines	26	1%	80.8%	-0.1 min	3.8%
G4 Allegiant Air	10	0%	50.0%	22.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CHS–ATL	Charleston to Atlanta	263	88.6%	-3.1 min	1.5%
CHS–CLT	Charleston to Charlotte	224	75.0%	13.2 min	0.4%
CHS–ORD	Charleston to Chicago	172	71.5%	14.5 min	2.3%
CHS–DCA	Charleston to Washington	143	63.6%	21.3 min	3.5%
CHS–LGA	Charleston to New York	139	57.6%	41.9 min	7.2%
CHS–EWR	Charleston to Newark	123	65.9%	18.3 min	3.3%
CHS–DFW	Charleston to Dallas/Fort Worth	110	88.2%	-7.4 min	0.0%
CHS–BWI	Charleston to Baltimore	102	80.4%	0.2 min	2.0%
CHS–BOS	Charleston to Boston	99	73.7%	13.4 min	1.0%
CHS–BNA	Charleston to Nashville	91	84.6%	0.6 min	0.0%
CHS–MIA	Charleston to Miami	86	81.4%	13.1 min	0.0%
CHS–PHL	Charleston to Philadelphia	85	72.9%	28.7 min	1.2%

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	31.6%	33.3%	13,089
Late-arriving aircraft	50.1%	41.1%	20,766
National Aviation System	17.1%	19.1%	7,086
Extreme weather	1.0%	6.4%	431
Security	0.1%	0.2%	51

41,423 delay minutes on 479 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 December 2025?

74.4% of 2,030 scheduled domestic departures left less than 15 minutes late, and 74.3% 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, 80.2% of 1,945 departures left on time and 0.6% were cancelled, against 74.4% and 1.9% 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 CHS · methodology · corrections.