Flight Reliability
DL 2940 · Delta Air Lines
Atlanta → Detroit (ATL–DTW)
68
Usually Fine
WanderNerd Reliability Score
- 67%
- Arrive within 15 minutes
- 17 min
- Average arrival delay
- 0.9%
- Cancelled
- 1 min early
- Median arrival delay
Based on 352 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 2940 arrived on time 78% of the time on Wednesdays and just 56% on Sundays. That gap is worth planning around.
Lagging the ATL–DTW route.
DL 2940 arrived on time 67% of the time, versus 78% across the ATL–DTW route.
Lagging the Delta Air Lines network.
DL 2940 arrived on time 67% of the time, versus 81% across the Delta Air Lines network.
Recent months have been rougher.
DL 2940 arrived on time 72% of the time over the last three months in the data, compared with 81% in the three months before that.
The breakdown
- Mon62%(50 flights)
- Tue75%(51 flights)
- Wed78%(51 flights)
- Thu67%(49 flights)
- Fri65%(48 flights)
- Sat67%(48 flights)
- Sun56%(52 flights)
68%
May
Jun 29% → May 68% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 29% | 24 |
| July 2025 | 35% | 26 |
| August 2025 | 68% | 31 |
| September 2025 | 70% | 30 |
| October 2025 | 65% | 31 |
| November 2025 | 69% | 29 |
| December 2025 | 76% | 29 |
| January 2026 | 84% | 31 |
| February 2026 | 82% | 28 |
| March 2026 | 62% | 29 |
| April 2026 | 87% | 30 |
| May 2026 | 68% | 31 |
- Departures on time
- 63%
- Diverted
- 0%
- Flights flown
- 349
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 352 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.