FlightRecord

Charleston International Airport (CHS): Delays & On-Time Performance

Data through May 2026

Charleston International Airport (CHS) is a tale of two seasons: departures ran 90% on-time in October 2024 but sank to 73% in July 2024. Across the year it averages 81% against a national 78%, over roughly 68 departures a day to 33 destinations.

Departures on-time
81%
left <15 min late
Avg dep delay
17 min
Arrivals on-time
78%
Cancelled
2.3%
Destinations
33
nonstop
Airlines
14

Monthly on-time trend

Monthly departure on-time percentage at CHS50%75%100%June 2024: 79% on-time (2,392 flights)79Jun 2024July 2024: 73% on-time (2,494 flights)73August 2024: 77% on-time (2,323 flights)77September 2024: 86% on-time (2,200 flights)86Sep 2024October 2024: 90% on-time (2,253 flights)90November 2024: 89% on-time (1,963 flights)89December 2024: 81% on-time (1,945 flights)81Dec 2024January 2025: 84% on-time (1,661 flights)84February 2025: 81% on-time (1,567 flights)81March 2025: 82% on-time (2,026 flights)82Mar 2025April 2025: 81% on-time (2,263 flights)81May 2025: 76% on-time (2,298 flights)76June 2025: 76% on-time (2,275 flights)76Jun 2025July 2025: 74% on-time (2,331 flights)74August 2025: 81% on-time (2,071 flights)81September 2025: 85% on-time (1,881 flights)85Sep 2025October 2025: 79% on-time (2,149 flights)79November 2025: 81% on-time (2,082 flights)81December 2025: 76% on-time (2,030 flights)76Dec 2025January 2026: 83% on-time (1,817 flights)83February 2026: 83% on-time (1,680 flights)83March 2026: 78% on-time (2,199 flights)78Mar 2026April 2026: 81% on-time (2,167 flights)81May 2026: 82% on-time (2,200 flights)82

Best time of day to depart from CHS

On-time percentage by scheduled departure hour at CHS5 a.m.: 93% on-time (2,004 flights)56 a.m.: 93% on-time (5,315 flights)67 a.m.: 91% on-time (3,592 flights)78 a.m.: 92% on-time (1,569 flights)89 a.m.: 88% on-time (1,566 flights)910 a.m.: 87% on-time (3,050 flights)1011 a.m.: 84% on-time (4,581 flights)1112 p.m.: 81% on-time (2,907 flights)121 p.m.: 79% on-time (2,675 flights)132 p.m.: 78% on-time (4,051 flights)143 p.m.: 74% on-time (2,725 flights)154 p.m.: 75% on-time (3,856 flights)165 p.m.: 72% on-time (2,669 flights)176 p.m.: 70% on-time (4,286 flights)187 p.m.: 68% on-time (3,479 flights)198 p.m.: 68% on-time (1,646 flights)209 p.m.: 69% on-time (282 flights)21scheduled departure hour

Busiest routes from CHS

RouteFlights/12moOn-timeAvg delay
CHS → ATL3,20888%10 min
CHS → CLT2,57982%19 min
CHS → ORD2,05780%15 min
CHS → DCA1,75875%24 min
CHS → LGA1,41478%22 min
CHS → EWR1,37779%22 min
CHS → DFW1,26879%20 min
CHS → BWI1,25282%10 min

Most reliable routes

  1. CHS → ATL88%
  2. CHS → IAD88%
  3. CHS → MDW86%
  4. CHS → BNA83%
  5. CHS → BWI82%

Most delay-prone routes

  1. CHS → AUS72%
  2. CHS → SEA72%
  3. CHS → CVG72%
  4. CHS → BOS73%
  5. CHS → DEN73%

Airline performance at CHS

AirlineOn-time departuresAvg delayFlights
United Airlines84%15 min4,923
Delta Air Lines84%15 min8,577
Envoy Air84%11 min1,928
Republic Airways83%14 min5,098
Endeavor Air83%14 min1,306
American Airlines80%21 min10,108
Southwest Airlines80%12 min7,174
Alaska Airlines78%11 min696
PSA Airlines78%22 min3,757
Spirit Airlines74%23 min1,702
SkyWest Airlines73%23 min968
Allegiant Air73%32 min326
JetBlue Airways72%21 min3,444
Frontier Airlines72%22 min260

Frequently asked questions

How often are flights delayed at CHS?
20% of departures from Charleston International Airport left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 17 minutes. The national on-time average over the same period was 78%.
What is the best time of day to depart from CHS?
Flights scheduled around 5 a.m. depart on time 93% of the time at CHS, versus 68% around 7 p.m.. Booking before noon is the usual rule of thumb here.
What is the worst month for delays at CHS?
In this dataset, July 2024 was the weakest month at CHS, with 73% of departures on time.
How often are flights cancelled at CHS?
2.3% of scheduled departures from CHS were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Based on 50,267 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.