Flight Reliability
DL 1618 · Delta Air Lines
Birmingham → Atlanta (BHM–ATL)
88
Pretty Reliable
WanderNerd Reliability Score
- 88%
- Arrive within 15 minutes
- 3 min early
- Average arrival delay
- 2.2%
- Cancelled
- 13 min early
- Median arrival delay
Based on 361 historical flights. Data through May 2026.
What the data says
Friday has been the better bet.
A small edge: 92% on time on Fridays against 85% on Saturdays.
Better than the Delta Air Lines network average.
DL 1618 arrived on time 88% of the time, versus 81% across the Delta Air Lines network.
Ticking up lately.
DL 1618 arrived on time 87% of the time over the last three months in the data, compared with 81% in the three months before that.
The breakdown
- Mon90%(49 flights)
- Tue86%(50 flights)
- Wed90%(51 flights)
- Thu88%(51 flights)
- Fri92%(52 flights)
- Sat85%(48 flights)
- Sun87%(52 flights)
86%
May
Jun 87% → May 86% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 87% | 30 |
| July 2025 | 94% | 31 |
| August 2025 | 94% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 94% | 31 |
| November 2025 | 93% | 28 |
| December 2025 | 97% | 29 |
| January 2026 | 70% | 27 |
| February 2026 | 75% | 28 |
| March 2026 | 83% | 29 |
| April 2026 | 93% | 30 |
| May 2026 | 86% | 29 |
- Departures on time
- 92%
- Diverted
- 0%
- Flights flown
- 353
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 361 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.