Flight OddsDL4990 BHM → DTW
Delta Air Lines · Birmingham, AL to Detroit, MI · 33 flights observed, 2026-01-19 to 2026-06-30 · 625 mi
DL4990 covers more than one route in the data window — the stats below are for BHM → DTW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
58%
Median delay
+13 min
90th percentile
+103 min
Cancellation rate
0%
How often is DL4990 on time?
Across 33 flights on BHM → DTW from 2026-01-19 to 2026-06-30, DL4990 arrived within 15 minutes of schedule 58% of the time. The median arrival delay was +13 min, and the worst 10% of flights arrived +103 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 19 | 58% |
| 16-30 min | 4 | 12% |
| 31-60 min | 4 | 12% |
| 61-120 min | 3 | 9% |
| 2+ hrs | 3 | 9% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 7 | 43% | +72 min |
| 2026-02 | 5 | 60% | +37 min |
| 2026-06 | 21 | 62% | +17 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 38% |
| Tue | 4 | 50% |
| Wed | 3 | 33% |
| Thu | 6 | 67% |
| Fri | 6 | 83% |
| Sat | No data | — |
| Sun | 6 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…