Flight Reliability
DL 1428 · Delta Air Lines
New York → Miami (JFK–MIA)
50
A Little Dicey
WanderNerd Reliability Score
- 67%
- Arrive within 15 minutes
- 22 min
- Average arrival delay
- 4.8%
- Cancelled
- 3 min early
- Median arrival delay
Based on 352 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 1428 arrived on time 82% of the time on Tuesdays and just 50% on Sundays. That gap is worth planning around.
Lagging the JFK–MIA route.
DL 1428 arrived on time 67% of the time, versus 76% across the JFK–MIA route.
Lagging the Delta Air Lines network.
DL 1428 arrived on time 67% of the time, versus 81% across the Delta Air Lines network.
Keep a backup plan handy.
DL 1428 was cancelled 4.8% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon72%(50 flights)
- Tue82%(45 flights)
- Wed67%(45 flights)
- Thu54%(48 flights)
- Fri70%(47 flights)
- Sat73%(52 flights)
- Sun50%(48 flights)
74%
May
Jun 54% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 54% | 28 |
| July 2025 | 42% | 26 |
| August 2025 | 71% | 31 |
| September 2025 | 67% | 30 |
| October 2025 | 66% | 29 |
| November 2025 | 63% | 27 |
| December 2025 | 62% | 29 |
| January 2026 | 74% | 23 |
| February 2026 | 62% | 21 |
| March 2026 | 77% | 30 |
| April 2026 | 87% | 30 |
| May 2026 | 74% | 31 |
- Departures on time
- 67%
- Diverted
- 0%
- Flights flown
- 335
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 352 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.