FlightRecord

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

Data through July 2026

Charleston International Airport (CHS) is a tale of two seasons: departures ran 90% on-time in October 2024 but sank to 71% in July 2026. Across the year it averages 80% against a national 78%, over roughly 67 departures a day to 33 destinations.

Departures on-time
80%
left <15 min late
Avg dep delay
18 min
Arrivals on-time
77%
Cancelled
2.4%
Destinations
33
nonstop
Airlines
14

Plan your departure from CHS

The choices most likely to improve your odds, based on this airport’s historical record.

Best departure time
Around 5 a.m.
93% on-time
Best day to fly
Tuesday
83% on-time
Most reliable airline here
United Airlines
84% on-time from CHS
Cancellation risk
2.4%
above the US average
Check routes from CHS ↓Compare nearby airports ↓

Monthly on-time trend

Monthly departure on-time percentage at CHS50%75%100%August 2024: 77% on-time (2,323 flights)77Aug 2024September 2024: 86% on-time (2,200 flights)86October 2024: 90% on-time (2,253 flights)90November 2024: 89% on-time (1,963 flights)89Nov 2024December 2024: 81% on-time (1,945 flights)81January 2025: 84% on-time (1,661 flights)84February 2025: 81% on-time (1,567 flights)81Feb 2025March 2025: 82% on-time (2,026 flights)82April 2025: 81% on-time (2,263 flights)81May 2025: 76% on-time (2,298 flights)76May 2025June 2025: 76% on-time (2,275 flights)76July 2025: 74% on-time (2,331 flights)74August 2025: 81% on-time (2,071 flights)81Aug 2025September 2025: 85% on-time (1,881 flights)85October 2025: 79% on-time (2,149 flights)79November 2025: 81% on-time (2,082 flights)81Nov 2025December 2025: 76% on-time (2,030 flights)76January 2026: 83% on-time (1,817 flights)83February 2026: 83% on-time (1,680 flights)83Feb 2026March 2026: 78% on-time (2,199 flights)78April 2026: 81% on-time (2,167 flights)81May 2026: 82% on-time (2,200 flights)82May 2026June 2026: 78% on-time (2,117 flights)78July 2026: 71% on-time (2,172 flights)71

Best time of day to depart from CHS

On-time percentage by scheduled departure hour at CHS5 a.m.: 93% on-time (2,020 flights)56 a.m.: 93% on-time (5,625 flights)67 a.m.: 92% on-time (3,685 flights)78 a.m.: 93% on-time (1,657 flights)89 a.m.: 88% on-time (1,545 flights)910 a.m.: 86% on-time (3,195 flights)1011 a.m.: 84% on-time (4,675 flights)1112 p.m.: 81% on-time (2,992 flights)121 p.m.: 78% on-time (2,809 flights)132 p.m.: 77% on-time (4,067 flights)143 p.m.: 72% on-time (3,053 flights)154 p.m.: 74% on-time (3,974 flights)165 p.m.: 71% on-time (2,701 flights)176 p.m.: 70% on-time (4,446 flights)187 p.m.: 67% on-time (3,624 flights)198 p.m.: 68% on-time (1,774 flights)209 p.m.: 64% on-time (308 flights)21scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday79%19 min
Tuesdaybest83%15 min
Wednesday83%15 min
Thursday79%18 min
Friday78%20 min
Saturday81%16 min
Sunday76%21 min

Next: compare the busiest routes from CHS ↓

Busiest routes from CHS

RouteFlights/12moOn-timeAvg delay
CHS → ATL (Atlanta)3,22188%11 min
CHS → CLT (Charlotte)2,49882%19 min
CHS → ORD (Chicago)2,10679%15 min
CHS → DCA (Washington)1,75174%26 min
CHS → LGA (New York)1,47177%23 min
CHS → EWR (Newark)1,34179%22 min
CHS → BWI (Baltimore)1,23382%10 min
CHS → DFW (Dallas/Fort Worth)1,22779%20 min
CHS → BOS (Boston)1,14172%27 min
CHS → PHL (Philadelphia)1,08979%19 min
CHS → MIA (Miami)1,00780%22 min
CHS → BNA (Nashville)98681%11 min
CHS → JFK (New York)78576%19 min
CHS → IAD (Washington)75888%11 min
CHS → DEN (Denver)64371%20 min
CHS → DTW (Detroit)57381%17 min
CHS → FLL (Fort Lauderdale)50875%18 min
CHS → MDW (Chicago)37085%10 min
CHS → DAL (Dallas)36577%15 min
CHS → SEA (Seattle)34773%12 min
CHS → MSP (Minneapolis)31880%19 min
CHS → IAH (Houston)21182%17 min
CHS → HOU (Houston)19380%11 min
CHS → STL (St. Louis)15979%16 min
CHS → AUS (Austin)12672%16 min
CHS → CVG (Cincinnati)10370%27 min

Compare airlines departing CHS ↓

Where flights into CHS come from

RouteFlights/12moOn-timeAvg delay
ATL (Atlanta) → CHS3,22181%12 min
CLT (Charlotte) → CHS2,50076%18 min
ORD (Chicago) → CHS2,10679%14 min
DCA (Washington) → CHS1,75172%22 min
LGA (New York) → CHS1,47176%19 min
EWR (Newark) → CHS1,34280%16 min
BWI (Baltimore) → CHS1,23478%13 min
DFW (Dallas/Fort Worth) → CHS1,22471%21 min

Most reliable routes

  1. CHS → IAD88%
  2. CHS → ATL88%
  3. CHS → MDW85%
  4. CHS → BWI82%
  5. CHS → CLT82%

Most delay-prone routes

  1. CHS → CVG70%
  2. CHS → DEN71%
  3. CHS → AUS72%
  4. CHS → BOS72%
  5. CHS → SEA73%

What causes delays at CHS

Share of total delay minutes by cause, as reported by carriers to the US DOT, weighted across routes departing CHS.

  • Late-arriving aircraft43%
  • Airline operations29%
  • National airspace system24%
  • Weather3%

Alternative airports near Charleston

Other airports within 120 miles, compared on departure reliability.

AirportDistanceOn-time departuresAvg delay
HHH — Hilton Head Airport60 mi80%20 min
MYR — Myrtle Beach International Airport84 mi79%19 min
SAV — Savannah Hilton Head International Airport86 mi79%19 min
CAE — Columbia Metropolitan Airport95 mi81%19 min
AGS — Augusta Regional At Bush Field116 mi78%23 min

Compare the airport-level record first, then check the exact route you plan to book.

Airline performance at CHS

AirlineOn-time departuresAvg delayFlights
United Airlines84%16 min5,212
Envoy Air84%11 min1,884
Delta Air Lines84%16 min9,055
Endeavor Air83%13 min1,048
Republic Airways83%14 min5,308
American Airlines80%21 min10,448
Southwest Airlines78%13 min7,614
Alaska Airlines77%11 min727
PSA Airlines76%25 min4,202
Spirit Airlines75%22 min1,567
SkyWest Airlines73%24 min976
JetBlue Airways71%23 min3,563
Frontier Airlines70%24 min227
Allegiant Air70%34 min333

Frequently asked questions

How often are flights delayed at CHS?
20% of departures from Charleston International Airport left 15+ minutes late between 2024-07 and 2026-07, with an average departure delay of 18 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 64% around 9 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 2026 was the weakest month at CHS, with 71% of departures on time.
How often are flights cancelled at CHS?
2.4% of scheduled departures from CHS were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Related guides

Based on 52,164 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.