Flight OddsDL1223 IAH → ATL
Delta Air Lines · Houston, TX to Atlanta, GA · 111 flights observed, 2025-12-20 to 2026-06-26 · 689 mi
DL1223 covers more than one route in the data window — the stats below are for IAH → ATL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
77%
Median delay
-9 min
90th percentile
+62 min
Cancellation rate
5%
How often is DL1223 on time?
Across 111 flights on IAH → ATL from 2025-12-20 to 2026-06-26, DL1223 arrived within 15 minutes of schedule 77% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +62 min or later. 5% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 82 | 77% |
| 16-30 min | 6 | 6% |
| 31-60 min | 7 | 7% |
| 61-120 min | 7 | 7% |
| 2+ hrs | 4 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 11 | 91% | +17 min |
| 2026-01 | 25 | 76% | +8 min |
| 2026-02 | 28 | 82% | -2 min |
| 2026-03 | 6 | 67% | +52 min |
| 2026-04 | 18 | 89% | -1 min |
| 2026-05 | 6 | 83% | +2 min |
| 2026-06 | 12 | 42% | +36 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 16 | 75% |
| Tue | 15 | 73% |
| Wed | 15 | 80% |
| Thu | 17 | 88% |
| Fri | 16 | 75% |
| Sat | 12 | 83% |
| Sun | 15 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…