Flight Reliability
DL 5284 · Delta Air Lines
Buffalo → New York (BUF–JFK)
79
Usually Fine
WanderNerd Reliability Score
- 87%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 3.6%
- Cancelled
- 12 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 5284 arrived on time 92% of the time on Fridays. On Sundays: 80%.
A bit ahead of the BUF–JFK route.
DL 5284 arrived on time 87% of the time, versus 81% across the BUF–JFK route.
A bit ahead of the Delta Air Lines network.
DL 5284 arrived on time 87% of the time, versus 81% across the Delta Air Lines network.
Keep a backup plan handy.
DL 5284 was cancelled 3.6% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon86%(49 flights)
- Tue88%(49 flights)
- Wed85%(48 flights)
- Thu89%(47 flights)
- Fri92%(52 flights)
- Sat86%(51 flights)
- Sun80%(50 flights)
90%
May
Jun 96% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 96% | 28 |
| July 2025 | 84% | 31 |
| August 2025 | 93% | 30 |
| September 2025 | 90% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 86% | 29 |
| December 2025 | 58% | 26 |
| January 2026 | 81% | 26 |
| February 2026 | 88% | 24 |
| March 2026 | 90% | 30 |
| April 2026 | 90% | 30 |
| May 2026 | 90% | 31 |
- Departures on time
- 91%
- Diverted
- 0.3%
- Flights flown
- 346
- 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.