Airport reliability
Charleston (CHS) on-time performance
How reliably flights leave Charleston, SC (CHS) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.
Charleston, SC24,517 departures in 12 months
- Departures on time
- 76.7% U.S. average 75.6%
- Cancelled
- 2.5% U.S. average 1.9%
- 60+ minutes late
- 8.3% U.S. average 8.1%
- Scheduled departures
- 24,517 12 months
What this means
CHS departures beat the U.S. average.
- 76.7% of the 24,517 scheduled departures from Charleston (CHS) arrived at their destination on time, 1.1 points higher than the U.S. average of 75.6%.
- 2.5% of departures were cancelled (U.S. average 1.9%), and 8.3% arrived an hour or more late.
- Flights arriving at CHS were on time 73.8% of the time.
- Among airlines with at least 300 departures, Delta Air Lines was the most punctual from CHS (82.5%) and Spirit Airlines the least (60.9%).
- Over the last 3 years, October was the most reliable month for departures from CHS (85.3% on time) and July the least reliable (68.7%).
- Cancellations peaked in January, when 6.4% of flights were cancelled.
- Flights scheduled to depart before 6 am were the most punctual (93.3% on time); flights scheduled to depart 8 pm to 9 pm were the least (61.2%).
Airlines at CHS
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Departures |
|---|---|---|---|---|---|
| Delta Air Lines | 82.5% | 2.2% | 7.2% | 102 min | 4,570 |
| Envoy AirSold as American Eagle | 81.9% | 2.6% | 6.1% | 72 min | 908 |
| American Airlines | 79.6% | 1.7% | 7.8% | 99 min | 5,132 |
| United Airlines | 78.4% | 1.5% | 8.2% | 85 min | 2,870 |
| Southwest Airlines | 76.6% | 0.9% | 5.4% | 50 min | 3,661 |
| Republic AirwaysSold as American Eagle, Delta Connection, United Express | 73.4% | 5.3% | 8.4% | 80 min | 2,648 |
| Alaska Airlines | 72.0% | 0.6% | 5.5% | 40 min | 347 |
| SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska | 71.5% | 2.9% | 12.8% | 106 min | 312 |
| Frontier Airlines | 69.3% | 0.0% | 13.3% | 70 min | 75 |
| PSA AirlinesSold as American Eagle | 68.1% | 4.4% | 12.5% | 120 min | 1,836 |
| Allegiant Air | 67.5% | 0.0% | 11.1% | 91 min | 126 |
| JetBlue Airways | 66.9% | 3.8% | 13.7% | 82 min | 1,651 |
| Spirit Airlines | 60.9% | 6.0% | 13.6% | 67 min | 381 |
Tap a heading to sort.
On-time rate by departure hour
Share of scheduled flights on time CHS average 76.7%
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | 93.3% | 758 |
| Departing 6 am to 7 am | 89.9% | 2,723 |
| Departing 7 am to 8 am | 88.2% | 1,658 |
| Departing 8 am to 9 am | 88.6% | 1,004 |
| Departing 9 am to 10 am | 86.0% | 558 |
| Departing 10 am to 11 am | 86.6% | 1,447 |
| Departing 11 am to noon | 81.6% | 2,164 |
| Departing noon to 1 pm | 79.4% | 1,571 |
| Departing 1 pm to 2 pm | 72.5% | 1,151 |
| Departing 2 pm to 3 pm | 73.5% | 1,729 |
| Departing 3 pm to 4 pm | 66.5% | 1,541 |
| Departing 4 pm to 5 pm | 67.1% | 1,912 |
| Departing 5 pm to 6 pm | 66.8% | 1,390 |
| Departing 6 pm to 7 pm | 68.9% | 1,950 |
| Departing 7 pm to 8 pm | 63.7% | 1,974 |
| Departing 8 pm to 9 pm | 61.2% | 835 |
| Departing 9 pm to 10 pm | 62.1% | 140 |
| Departing 10 pm to 11 pm | Insufficient sample | 12 |
Best and worst months at CHS
Share of scheduled flights on time 12-month average 76.7%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 77.1% | 5,231 |
| February | 81.6% | 4,953 |
| March | 79.3% | 6,278 |
| April | 80.0% | 6,636 |
| May | 75.9% | 6,904 |
| June | 75.3% | 6,784 |
| July | 68.7% | 6,997 |
| August | 74.6% | 6,417 |
| September | 83.3% | 6,150 |
| October | 85.3% | 6,578 |
| November | 85.0% | 6,046 |
| December | 80.3% | 5,948 |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 84.1% | 1,881 |
| Oct 2025 | 79.0% | 2,149 |
| Nov 2025 | 78.6% | 2,082 |
| Dec 2025 | 74.3% | 2,030 |
| Jan 2026 | 76.6% | 1,817 |
| Feb 2026 | 78.6% | 1,680 |
| Mar 2026 | 75.0% | 2,199 |
| Apr 2026 | 80.7% | 2,167 |
| May 2026 | 80.1% | 2,200 |
| Jun 2026 | 75.2% | 2,117 |
| Jul 2026 | 68.4% | 2,172 |
| Aug 2026 | 70.4% | 2,023 |
Busiest routes from CHS
| To | On time | Cancelled | Airlines | Flights |
|---|---|---|---|---|
| Atlanta (ATL) | 87.2% | 1.7% | 2 | 3,234 |
| Charlotte (CLT) | 81.1% | 1.8% | 3 | 2,506 |
| Chicago (ORD) | 74.2% | 2.3% | 6 | 2,153 |
| Washington (DCA) | 68.0% | 5.0% | 4 | 1,748 |
| New York (LGA) | 69.3% | 6.5% | 2 | 1,500 |
| Newark (EWR) | 75.9% | 3.6% | 3 | 1,320 |
| Dallas/Fort Worth (DFW) | 78.6% | 2.2% | 4 | 1,236 |
| Baltimore (BWI) | 79.6% | 1.5% | 1 | 1,229 |
| Boston (BOS) | 67.3% | 3.1% | 3 | 1,150 |
| Philadelphia (PHL) | 76.9% | 1.9% | 4 | 1,055 |
| Nashville (BNA) | 76.3% | 0.6% | 1 | 989 |
| Miami (MIA) | 78.8% | 1.3% | 3 | 953 |
| New York (JFK) | 68.7% | 6.5% | 3 | 789 |
| Washington (IAD) | 83.7% | 1.0% | 2 | 762 |
| Denver (DEN) | 68.9% | 0.6% | 2 | 663 |
| Fort Lauderdale (FLL) | 64.6% | 3.1% | 2 | 491 |
| Detroit (DTW) | 81.9% | 1.6% | 3 | 485 |
| Chicago (MDW) | 78.1% | 0.5% | 1 | 384 |
| Dallas (DAL) | 77.0% | 0.8% | 1 | 365 |
| Seattle (SEA) | 72.0% | 0.6% | 1 | 347 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Scheduled nonstop domestic departures from Charleston, SC (CHS) by airlines that report to the DOT.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.