DL1223
Delta Air Lines flight 1223 — Atlanta (ATL) to Houston (IAH)
On time
76%
Avg delay
~67 min
Cancelled
1.3%
DL1223 is fairly reliable, though delays happen. About 76% of departures arrive on time. When delays happen, the most common cause is late-arriving aircraft.
Monthly breakdown
| Month | On time | Cancelled | Avg delay |
|---|---|---|---|
| 2026-07 | 54% | 0.0% | 75 min |
| 2026-07 | 50% | 0.0% | 94 min |
| 2026-06 | 47% | 0.0% | 67 min |
| 2026-06 | 42% | 0.0% | 72 min |
| 2026-05 | 70% | 0.0% | 46 min |
| 2026-05 | 83% | 0.0% | 63 min |
| 2026-04 | 89% | 0.0% | 73 min |
| 2026-04 | 89% | 0.0% | 71 min |
| 2026-04 | 83% | 0.0% | 84 min |
| 2026-03 | 83% | 0.0% | 43 min |
| 2026-03 | 67% | 14.3% | 183 min |
| 2026-03 | 79% | 0.0% | 62 min |
Top delay cause
late-arriving aircraft
Based on 1,849 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.