Flight Reliability
DL 956 · Delta Air Lines
Atlanta → Denver (ATL–DEN)
65
Usually Fine
WanderNerd Reliability Score
- 73%
- Arrive within 15 minutes
- 10 min
- Average arrival delay
- 3.4%
- Cancelled
- 1 min early
- Median arrival delay
Based on 237 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 956 arrived on time 84% of the time on Tuesdays and just 59% on Sundays. That gap is worth planning around.
A bit behind the ATL–DEN route.
DL 956 arrived on time 73% of the time, versus 77% across the ATL–DEN route.
Lagging the Delta Air Lines network.
DL 956 arrived on time 73% of the time, versus 81% across the Delta Air Lines network.
Keep a backup plan handy.
DL 956 was cancelled 3.4% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon73%(45 flights)
- Tue84%(19 flights)
- Wed72%(18 flights)
- Thu76%(41 flights)
- Fri78%(40 flights)
- Sat79%(19 flights)
- Sun59%(46 flights)
80%
May
Jun 36% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 36% | 14 |
| July 2025 | 29% | 14 |
| August 2025 | 75% | 12 |
| September 2025 | 67% | 12 |
| October 2025 | 75% | 16 |
| December 2025 | 47% | 17 |
| January 2026 | 93% | 28 |
| February 2026 | 92% | 24 |
| March 2026 | 79% | 28 |
| April 2026 | 76% | 29 |
| May 2026 | 80% | 25 |
- Departures on time
- 79%
- Diverted
- 0.4%
- Flights flown
- 228
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 237 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.