Flight Reliability
DL 865 · Delta Air Lines
Atlanta → Boston (ATL–BOS)
75
Usually Fine
WanderNerd Reliability Score
- 79%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 3.1%
- Cancelled
- 8 min early
- Median arrival delay
Based on 360 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 865 arrived on time 83% of the time on Mondays. On Sundays: 74%.
A bit ahead of the ATL–BOS route.
DL 865 arrived on time 79% of the time, versus 74% across the ATL–BOS route.
Keep a backup plan handy.
DL 865 was cancelled 3.1% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon83%(48 flights)
- Tue83%(52 flights)
- Wed81%(52 flights)
- Thu75%(51 flights)
- Fri76%(46 flights)
- Sat82%(51 flights)
- Sun74%(49 flights)
80%
May
Jun 68% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 68% | 28 |
| July 2025 | 55% | 31 |
| August 2025 | 84% | 31 |
| September 2025 | 100% | 30 |
| October 2025 | 77% | 30 |
| November 2025 | 72% | 25 |
| December 2025 | 83% | 29 |
| January 2026 | 79% | 29 |
| February 2026 | 82% | 27 |
| March 2026 | 72% | 29 |
| April 2026 | 97% | 30 |
| May 2026 | 80% | 30 |
- Departures on time
- 73%
- Diverted
- 0%
- Flights flown
- 349
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 360 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.