Flight Reliability
DL 5311 · Delta Air Lines
Rochester → New York (ROC–LGA)
78
Usually Fine
WanderNerd Reliability Score
- 82%
- Arrive within 15 minutes
- 11 min
- Average arrival delay
- 2.9%
- Cancelled
- 9 min early
- Median arrival delay
Based on 340 historical flights. Data through May 2026.
What the data says
Skip Monday if you can.
DL 5311 arrived on time 87% of the time on Saturdays. On Mondays: 77%.
Better than the ROC–LGA route average.
DL 5311 arrived on time 82% of the time, versus 74% across the ROC–LGA route.
Trending in the right direction.
DL 5311 arrived on time 86% of the time over the last three months in the data, compared with 59% in the three months before that.
The breakdown
- Mon77%(48 flights)
- Tue81%(48 flights)
- Wed84%(49 flights)
- Thu81%(48 flights)
- Fri79%(48 flights)
- Sat87%(45 flights)
- Sun86%(44 flights)
93%
May
Jun 89% → May 93% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 89% | 28 |
| July 2025 | 84% | 31 |
| August 2025 | 87% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 87% | 30 |
| December 2025 | 42% | 19 |
| January 2026 | 74% | 23 |
| February 2026 | 60% | 20 |
| March 2026 | 70% | 27 |
| April 2026 | 93% | 30 |
| May 2026 | 93% | 30 |
- Departures on time
- 87%
- Diverted
- 0%
- Flights flown
- 330
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 340 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.