Route Reliability

Route reliability

Charleston (CHS) to Atlanta (ATL): which airline is most on time?

On-time arrivals, cancellations and long delays for every airline that reported nonstop flights from Charleston, SC (CHS) to Atlanta, GA (ATL), September 2025 to August 2026.

Historical performance Official DOT data through August 2026 · Not live flight status

Charleston, SCAtlanta, GA

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Three-letter airport codes, nonstop U.S. domestic flights. One direction at a time.

Route at a glance · September 2025 to August 2026

CHS to ATL

Charleston, SC to Atlanta, GA

On time
87.2%vs 75.6% U.S. average Better than average
Cancelled
1.7%vs 1.9% U.S. average About average
60+ min late
5.0%vs 8.1% U.S. average Better than average
Scheduled flights
3,234in 12 months2 airlines
Only rated airline
Delta Air Lines87.2% on time · 3,231 flights

On time more often than the U.S. average, with a typical cancellation rate.

Compared with all U.S. flights, September 2025 to August 2026. “About average” means within 1.5 points for on time, 0.3 for cancelled and 1 for 60+ minutes late.

Airlines on this route

Ranked by on-time arrival

Airlines from CHS to ATL, September 2025 to August 2026. Rates are shares of all scheduled flights.
Airline On time Cancelled 60+ min late Avg delay when late Diverted Flights
1. Delta Air Lines 87.2% 1.7% 5.0% 79 min 0.2% 3,231
SkyWest Airlines Operating carrier; sold as United Express, Delta Connection, American Eagle, Alaska Insufficient sample (fewer than 50 flights) 3

On time = arrived within 15 minutes of schedule. Avg delay when late = average arrival delay of flights 15+ minutes late. "Most reliable" needs at least 300 flights in 12 months. Tap a heading to sort.

What this means

How CHS to ATL compares.

  • Delta Air Lines was the only airline with enough flights on this route to rate (3,231 flights). 87.2% of them arrived within 15 minutes of schedule.
  • SkyWest Airlines also flew this route but with fewer than 50 reported flights, too few to rate.
  • 1.7% of flights on this route were cancelled (about 1 in 59), about the same as the U.S. average of 1.9%.
  • 5.0% of flights, about 1 in 20, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 79 min.
  • Overall, 87.2% of flights on this route arrived on time, 11.6 points higher than the U.S. average of 75.6%.
  • Over the last 3 years, October was the most reliable month on this route (94.5% on time) and July the least reliable (73.8%).
  • Cancellations peaked in January, when 3.6% of flights were cancelled.
  • Flights scheduled to depart before 6 am were the most punctual (94.1% on time); flights scheduled to depart 5 pm to 6 pm were the least (76.6%).
  • In the other direction, Atlanta (ATL) to Charleston (CHS), 80.7% of flights were on time and 1.7% were cancelled. Compare airlines ATL to CHS.

Best and worst months to fly CHS to ATL

Jan 85.2%
Feb 90.1%
Mar 85.4%
Apr 87.8%
May 82.8%
Jun 84.7%
Jul 73.8%
Aug 85.5%
Sep 91.9%
Oct 94.5%
Nov 92.7%
Dec 88.9%
Share of scheduled flights on time 12-month average 87.2%
All airlines combined, by calendar month, September 2023 to August 2026 (3 years pooled). Scale starts at zero.
Show as table
PeriodOn timeFlights
January 85.2% 663
February 90.1% 627
March 85.4% 768
April 87.8% 777
May 82.8% 804
June 84.7% 809
July 73.8% 828
August 85.5% 770
September 91.9% 712
October 94.5% 769
November 92.7% 709
December 88.9% 713

Month by month, last 12 months

Sep 96.2%
Oct 91.4%
Nov 89.7%
Dec 88.6%
Jan 88.7%
Feb 91.0%
Mar 81.5%
Apr 90.1%
May 85.9%
Jun 90.4%
Jul 75.5%
Aug 80.1%
Share of scheduled flights on time U.S. average 75.6%
All airlines combined, September 2025 to August 2026. Scale starts at zero.
Show as table
PeriodOn timeFlights
Sep 2025 96.2% 239
Oct 2025 91.4% 279
Nov 2025 89.7% 263
Dec 2025 88.6% 263
Jan 2026 88.7% 247
Feb 2026 91.0% 234
Mar 2026 81.5% 286
Apr 2026 90.1% 294
May 2026 85.9% 290
Jun 2026 90.4% 282
Jul 2026 75.5% 290
Aug 2026 80.1% 267

Best and worst departure times

<6a 94.1%
6a 92.5%
7a 88.8%
8a 93.6%
9a 87.7%
10a 91.2%
11a 93.5%
12p 89.7%
1p 84.2%
2p 79.8%
3p 82.6%
4p 83.9%
5p 76.6%
6p 78.4%
7p 78.8%
8p 87.3%
Share of scheduled flights on time
By scheduled local departure hour at CHS, September 2025 to August 2026. Hours with no scheduled flights are omitted. Scale starts at zero.
Show as table
PeriodOn timeFlights
Departing before 6 am 94.1% 341
Departing 6 am to 7 am 92.5% 360
Departing 7 am to 8 am 88.8% 196
Departing 8 am to 9 am 93.6% 312
Departing 9 am to 10 am 87.7% 146
Departing 10 am to 11 am 91.2% 238
Departing 11 am to noon 93.5% 123
Departing noon to 1 pm 89.7% 203
Departing 1 pm to 2 pm 84.2% 146
Departing 2 pm to 3 pm 79.8% 272
Departing 3 pm to 4 pm 82.6% 109
Departing 4 pm to 5 pm 83.9% 174
Departing 5 pm to 6 pm 76.6% 218
Departing 6 pm to 7 pm 78.4% 190
Departing 7 pm to 8 pm 78.8% 151
Departing 8 pm to 9 pm 87.3% 55
Woman at an airport window watching a plane take off
Photo: Depositphotos (licensed stock, illustrative only). Credits

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
Nonstop scheduled flights from Charleston, SC (CHS) to Atlanta, GA (ATL), one direction. Airlines that report to the DOT only.
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.

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