Airport month record

CHSAPR

Charleston International in April 2026

Departures: 2,167
Month: April 2026
National, same month: 79.8%
Carriers: 10

Historical statistics for April 2026, not live status or a forecast for this year’s April. For today’s conditions at CHS, see live FAA status.

CHS in April lands a B+, 2 points better than the national rate of 79.8%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 2,167 flights, of which Delta Air Lines flew 378 at 88.0% on time.

On time

81.5%

Arrivals under 15 minutes late, of 2,146 completed departures

Avg delay

81 min

Across delayed arrivals only, not all flights

Cancelled

0.74%

Nationally in April: 0.90%

Whole year

78.9%

CHS across all twelve months

These figures cover 2,167 departures from Charleston International in April 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

April next to CHS's other months

Against CHS's own year, April ran 3 points better than the twelve-month rate of 78.9%, which makes it number four of twelve months, best first. Cancellations were unusually low for CHS in April, at 0.74% against 2.47% across the year. Either side of it, March ran 78.9% on time and May 80.9%, so this month sits in line with its neighbours.

CHS month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
September 2025	1,881	84.5%	67 min	0.32%	B+
October 2025	2,149	79.5%	81 min	0.47%	B+
November 2025	2,082	80.6%	87 min	2.21%	B
December 2025	2,030	75.9%	87 min	1.92%	B
January 2026	1,817	82.3%	86 min	6.66%	B−
February 2026	1,680	81.8%	77 min	3.75%	B−
March 2026	2,199	78.9%	89 min	4.23%	B−
April 2026 (this page)	2,167	81.5%	81 min	0.74%	B+
May 2026	2,200	80.9%	82 min	0.73%	B+
June 2026	2,117	77.5%	89 min	2.41%	B
July 2026	2,172	71.6%	102 min	3.87%	C−
August 2026	2,023	73.0%	86 min	2.97%	C

Departure window

The best time of day to leave CHS in April

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 23 points, against 5 points between the best and worst carrier.

5am–8am438 flights93.6%
8am–11am226 flights87.3%
11am–2pm459 flights81.4%
2pm–5pm417 flights77.5%
5pm–8pm528 flights74.0%
8pm–5am99 flights70.7%

Scale runs 60% to 100%.

Book the early departure. Flights leaving between 5am–8am arrive on time 93.6% of the time, against 70.7% for the overnight window. That is 23 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 528 flights scheduled in it.

Across the week, Wednesday is the strongest day at 85.2% on time and Sunday the weakest at 75.0%, a spread of 10 points.

Carrier by carrier

Which airlines ran best at CHS in April

The two carriers here are closely matched: 5 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

Carriers at CHS in April 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines	463	83.5%	95 min	0.43%	B+
Delta Air Lines	378	88.0%	110 min	0.79%	A+
Southwest Airlinesthin sample	323	79.6%	37 min	0.00%	B+
United Airlinesthin sample	315	78.6%	83 min	1.59%	B
Republic Airwaysthin sample	235	78.4%	69 min	0.43%	B+
JetBlue Airwaysthin sample	163	75.5%	65 min	0.00%	B+
PSA Airlinesthin sample	131	81.2%	201 min	2.29%	B
Envoy Airthin sample	47	89.1%	66 min	0.00%	A+
Spirit Airlinesthin sample	37	68.6%	25 min	5.41%	C−
Alaska Airlinesthin sample	30	76.7%	27 min	0.00%	B+

No carrier stands out. Delta tops the table at 88.0%, 5 points clear of the bottom, which is inside the range this kind of sample moves year to year.

Route by route

Busiest routes out of CHS in April

Routes from CHS in April 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
CHS to ATL · Atlantathin sample	294	91.1%	100 min	1.02%	A
CHS to ORD · Chicagothin sample	194	74.2%	119 min	2.58%	C
CHS to CLT · Charlottethin sample	192	90.1%	93 min	0.00%	A+
CHS to DCA · Washingtonthin sample	148	77.2%	167 min	2.03%	B
CHS to LGA · New Yorkthin sample	126	76.8%	58 min	0.00%	B+
CHS to DFW · Dallas-Fort Worththin sample	114	80.5%	102 min	0.88%	B+
CHS to BOS · Bostonthin sample	113	80.5%	112 min	0.00%	B+
CHS to EWR · Newarkthin sample	113	88.3%	39 min	1.77%	A
CHS to BWI · Baltimorethin sample	109	81.7%	27 min	0.00%	B+
CHS to MIA · Miamithin sample	93	76.1%	50 min	0.00%	B+
CHS to PHL · Philadelphiathin sample	91	81.3%	34 min	0.00%	B+
CHS to BNA · Nashvillethin sample	86	76.7%	35 min	0.00%	B+
CHS to IAD · Washingtonthin sample	77	85.7%	71 min	0.00%	A+
CHS to JFK · New Yorkthin sample	65	78.5%	55 min	0.00%	B+
CHS to DEN · Denverthin sample	59	76.3%	99 min	0.00%	B+
CHS to FLL · Fort Lauderdalethin sample	39	57.9%	68 min	2.56%	D
CHS to MDW · Chicagothin sample	33	84.8%	44 min	0.00%	B+
CHS to IAH · Houstonthin sample	31	70.0%	77 min	3.23%	C−
CHS to DAL · Dallasthin sample	30	70.0%	52 min	0.00%	C+
CHS to SEA · Seattlethin sample	30	76.7%	27 min	0.00%	B+

Delay causes

What held CHS up in April

Late-arriving aircraft accounts for 47% of the 32,000 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
47%
Carrier
34%
National Airspace System
19%
Extreme weather
1%
Security
0%

47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 32,000 reported delay minutes here, that single category outweighs weather by 47 to one. The split is drawn from 32,107 reported delay minutes.

Cancellations are rare at 0.74%, below the national 0.90% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

6.2% of arrivals land an hour or more late, close to the national 6.4%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

What to do with this

Flying from CHS in April

For a April trip through CHS: expect 81.5% on time and 0.74% cancelled, going by April 2026. The 5am–8am window was the strongest part of the day.

Charleston International (CHS), the whole year
CHS in September84.5%
CHS in October79.5%
CHS in November80.6%
CHS in December75.9%
CHS in January82.3%
CHS in February81.8%
CHS in March78.9%
CHS in May80.9%
CHS in June77.5%
CHS in July71.6%
CHS in August73.0%

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures