Charleston AFB/International in May 2026

81.0%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 2026, reporting carriers scheduled 2,200 domestic departures from Charleston AFB/International (CHS). 81.0% left less than 15 minutes late and 80.1% reached their destination on time; 0.7% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so CHS departures were 3.9 points above the national departure figure.

A year earlier, in May 2025, the airport had 2,298 departures with 74.4% leaving on time: a change of +6.6 points, with flights down 4%.

Flights arriving at CHS that month were on time 77.8% of the time (2,199 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 29% and national aviation system 26%.

On time 80.1%
Arrived 15+ minutes late 18.9%
Cancelled 0.7%
Diverted 0.3%

Every scheduled departure from CHS in May 2026, judged by arrival at the destination.

May 2026 against a year earlier, the airport's year and the nation

Measure	May 2026	May 2025	CHS, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	81.0%	74.4%	77.8%	77.1%
Arrived on time	80.1%	72.8%	77.5%	77.6%
Cancelled	0.7%	1.6%	2.3%	0.9%
Average departure delay (late minutes only)	16.5 min	20.5 min	18.1 min	16.0 min
Scheduled departures a day	73	77	67	20,391
Scheduled departures	2,200	2,298	24,565	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	477	22%	78.2%	17.1 min	1.0%
DL Delta Air Lines	413	19%	83.1%	-1.3 min	1.7%
WN Southwest Airlines	338	15%	76.6%	4.9 min	0.3%
UA United Airlines	305	14%	84.3%	0.5 min	0.0%
OH PSA Airlines	208	9%	73.6%	17.5 min	0.5%
YX Republic Airline	189	9%	83.6%	1.9 min	0.5%
B6 JetBlue Airways	177	8%	82.5%	2.0 min	0.0%
AS Alaska Airlines	31	1%	77.4%	1.7 min	3.2%
MQ Envoy Air	26	1%	84.6%	-9.0 min	0.0%
OO SkyWest Airlines	21	1%	71.4%	53.0 min	0.0%
G4 Allegiant Air	14	1%	85.7%	0.4 min	0.0%
NK Spirit Airlines	1	0%	0.0%	56.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CHS–ATL	Charleston to Atlanta	290	85.9%	-4.4 min	1.4%
CHS–CLT	Charleston to Charlotte	216	81.5%	11.6 min	0.0%
CHS–ORD	Charleston to Chicago	208	78.8%	7.7 min	0.5%
CHS–DCA	Charleston to Washington	151	74.8%	24.2 min	0.7%
CHS–BOS	Charleston to Boston	125	79.2%	0.6 min	0.0%
CHS–DFW	Charleston to Dallas/Fort Worth	122	72.1%	29.8 min	2.5%
CHS–LGA	Charleston to New York	116	78.4%	11.6 min	1.7%
CHS–BWI	Charleston to Baltimore	113	81.4%	1.9 min	0.0%
CHS–PHL	Charleston to Philadelphia	100	80.0%	7.1 min	1.0%
CHS–EWR	Charleston to Newark	93	87.1%	-0.3 min	0.0%
CHS–BNA	Charleston to Nashville	87	70.1%	11.7 min	0.0%
CHS–MIA	Charleston to Miami	85	71.8%	12.1 min	0.0%

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), May 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	29.4%	33.0%	9,966
Late-arriving aircraft	43.8%	40.4%	14,860
National Aviation System	26.0%	20.5%	8,834
Extreme weather	0.7%	6.0%	254
Security	0.0%	0.1%	7

33,921 delay minutes on 416 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 2026?

81.0% of 2,200 scheduled domestic departures left less than 15 minutes late, and 80.1% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 74.4% of 2,298 departures left on time and 1.6% were cancelled, against 81.0% and 0.7% in May 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; 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.