Columbus (CMH) to Atlanta (ATL): On-Time Performance
Data through May 2026
The calendar drives reliability on CMH–ATL. October 2024 flights landed on schedule 94% of the time, but July 2024 dropped to 76% — a gap of 18 points. Across the full period the route averages 86% on-time against a national 78%. Morning departures also hold up better than evening ones (90% vs 76%), which matters most in the rough months.
- On-time
- 86%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 8.8
- last 12 months
- Duration
- 1h 39m
- scheduled
- Distance
- 447 mi
Best airline from CMH to ATL
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 87% | 12 min | 1.3% | 5,175 |
| Spirit Airlines | 87% | 7 min | 1.1% | 90 |
| Southwest Airlines | 83% | 10 min | 0.7% | 983 |
| Frontier Airlines | 52% | 31 min | 3.9% | 129 |
Monthly on-time trend
Best time to fly from CMH to ATL
Aim for departures around 5 a.m. (96% on-time); avoid 8 p.m. departures (70%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 14 min |
| Tuesday | 88% | 11 min |
| Wednesdaybest | 90% | 8 min |
| Thursday | 87% | 8 min |
| Friday | 85% | 14 min |
| Saturday | 86% | 10 min |
| Sunday | 81% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations39%
- National airspace system21%
- Weather2%
Frequently asked questions
- How often are flights from CMH to ATL delayed?
- 15% of CMH–ATL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 12 minutes.
- Which airline is most reliable from CMH to ATL?
- Delta Air Lines has the best on-time record on this route at 87%, based on 5,175 flights. 4 airlines flew CMH–ATL frequently enough to compare in this period.
- What is the best time of day to fly from CMH to ATL?
- Departures around 5 a.m. have the best record (96% on-time), while departures around 8 p.m. have the worst (70%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CMH to ATL?
- The scheduled CMH–ATL flight time averages 1h 39m over 447 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are CMH to ATL flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from CMH to ATL?
- July 2024 was the roughest month in this dataset, with only 76% of arrivals on time. The best was October 2024 at 94%. If your dates are flexible, that 18-point gap is worth planning around.
Explore related pages
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Based on 6,379 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.