Flight Reliability
DL 520 · Delta Air Lines
Atlanta → New York (ATL–LGA)
59
A Little Dicey
WanderNerd Reliability Score
- 70%
- Arrive within 15 minutes
- 12 min
- Average arrival delay
- 3.6%
- Cancelled
- 1 min early
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
DL 520 arrived on time 81% of the time on Fridays and just 60% on Mondays. That gap is worth planning around.
A bit behind the ATL–LGA route.
DL 520 arrived on time 70% of the time, versus 73% across the ATL–LGA route.
Lagging the Delta Air Lines network.
DL 520 arrived on time 70% of the time, versus 81% across the Delta Air Lines network.
Keep a backup plan handy.
DL 520 was cancelled 3.6% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon60%(50 flights)
- Tue71%(51 flights)
- Wed76%(50 flights)
- Thu67%(48 flights)
- Fri81%(47 flights)
- Sat71%(51 flights)
- Sun65%(51 flights)
50%
May
Jun 54% → May 50% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 54% | 28 |
| July 2025 | 41% | 27 |
| August 2025 | 84% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 82% | 28 |
| November 2025 | 59% | 29 |
| December 2025 | 66% | 29 |
| January 2026 | 90% | 30 |
| February 2026 | 81% | 26 |
| March 2026 | 60% | 30 |
| April 2026 | 77% | 30 |
| May 2026 | 50% | 30 |
- Departures on time
- 68%
- Diverted
- 0.8%
- Flights flown
- 348
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 364 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.