Charleston AFB/International in May 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 May 2025, reporting carriers scheduled 2,298 domestic departures from Charleston AFB/International (CHS). 74.4% left less than 15 minutes late and 72.8% reached their destination on time; 1.6% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so CHS departures were 2.3 points below the national departure figure.

A year earlier, in May 2024, the airport had 2,406 departures with 77.8% leaving on time: a change of −3.4 points, with flights down 4%.

Flights arriving at CHS that month were on time 72.2% of the time (2,296 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 36%, late-arriving aircraft 31% and air carrier 31%.

On time 72.8%
Arrived 15+ minutes late 25.3%
Cancelled 1.6%
Diverted 0.2%

Every scheduled departure from CHS in May 2025, judged by arrival at the destination.

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

Measure	May 2025	May 2024	CHS, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	74.4%	77.8%	77.8%	76.7%
Arrived on time	72.8%	74.9%	77.5%	75.4%
Cancelled	1.6%	1.1%	2.3%	1.0%
Average departure delay (late minutes only)	20.5 min	19.2 min	18.1 min	17.5 min
Scheduled departures a day	77	80	67	20,188
Scheduled departures	2,298	2,406	24,565	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	547	24%	72.8%	18.7 min	1.6%
DL Delta Air Lines	393	17%	79.4%	6.8 min	0.8%
WN Southwest Airlines	367	16%	78.2%	7.4 min	0.0%
YX Republic Airline	266	12%	71.1%	10.8 min	1.9%
UA United Airlines	224	10%	68.8%	30.0 min	3.6%
B6 JetBlue Airways	164	7%	67.1%	15.0 min	0.0%
NK Spirit Airlines	93	4%	57.0%	32.0 min	8.6%
OH PSA Airlines	86	4%	68.6%	8.8 min	4.7%
MQ Envoy Air	58	3%	62.1%	10.1 min	0.0%
OO SkyWest Airlines	45	2%	77.8%	24.8 min	0.0%
AS Alaska Airlines	31	1%	74.2%	-2.1 min	0.0%
G4 Allegiant Air	15	1%	66.7%	12.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CHS–ATL	Charleston to Atlanta	282	83.7%	3.6 min	0.0%
CHS–CLT	Charleston to Charlotte	247	81.0%	12.6 min	0.4%
CHS–DCA	Charleston to Washington	180	64.4%	16.3 min	2.8%
CHS–ORD	Charleston to Chicago	157	73.2%	4.2 min	0.0%
CHS–PHL	Charleston to Philadelphia	135	66.7%	15.1 min	3.0%
CHS–EWR	Charleston to Newark	128	48.4%	51.9 min	10.2%
CHS–BWI	Charleston to Baltimore	125	79.2%	7.9 min	0.0%
CHS–BOS	Charleston to Boston	120	60.8%	24.2 min	1.7%
CHS–DFW	Charleston to Dallas/Fort Worth	119	63.0%	33.2 min	4.2%
CHS–LGA	Charleston to New York	98	73.5%	14.2 min	4.1%
CHS–MIA	Charleston to Miami	92	78.3%	7.4 min	1.1%
CHS–BNA	Charleston to Nashville	80	80.0%	3.7 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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	30.6%	29.3%	14,246
Late-arriving aircraft	31.3%	37.8%	14,576
National Aviation System	35.8%	25.9%	16,641
Extreme weather	2.3%	6.9%	1,051
Security	0.0%	0.1%	0

46,514 delay minutes on 582 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 May 2025?

74.4% of 2,298 scheduled domestic departures left less than 15 minutes late, and 72.8% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 77.8% of 2,406 departures left on time and 1.1% were cancelled, against 74.4% and 1.6% in May 2025.

Provenance

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