Flight Reliability
DL 2257 · Delta Air Lines
Atlanta → Birmingham (ATL–BHM)
81
Pretty Reliable
WanderNerd Reliability Score
- 82%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 2.2%
- Cancelled
- 7 min early
- Median arrival delay
Based on 274 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 2257 arrived on time 90% of the time on Wednesdays and just 70% on Fridays. That gap is worth planning around.
Ticking up lately.
DL 2257 arrived on time 82% of the time over the last three months in the data, compared with 78% in the three months before that.
The breakdown
- Mon79%(47 flights)
- Tue76%(29 flights)
- Wed90%(30 flights)
- Thu90%(49 flights)
- Fri70%(47 flights)
- Sat83%(23 flights)
- Sun86%(43 flights)
- 3–6 PM80%(10 flights)
- 6–9 PM82%(179 flights)
- 9 PM–12 AM82%(79 flights)
72%
May
Jun 72% → May 72% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 72% | 18 |
| July 2025 | 58% | 26 |
| August 2025 | 84% | 31 |
| September 2025 | 93% | 27 |
| October 2025 | 90% | 30 |
| November 2025 | 93% | 28 |
| December 2025 | 78% | 18 |
| January 2026 | 71% | 14 |
| February 2026 | 86% | 21 |
| March 2026 | 80% | 20 |
| April 2026 | 94% | 17 |
| May 2026 | 72% | 18 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 268
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 274 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.