Flight Reliability
DL 2934 · Delta Air Lines
Detroit → New York (DTW–JFK)
70
Usually Fine
WanderNerd Reliability Score
- 76%
- Arrive within 15 minutes
- 11 min
- Average arrival delay
- 2.5%
- Cancelled
- 10 min early
- Median arrival delay
Based on 319 historical flights. Data through May 2026.
What the data says
Tuesday has been the better bet.
A small edge: 80% on time on Tuesdays against 74% on Thursdays.
A bit behind the DTW–JFK route.
DL 2934 arrived on time 76% of the time, versus 81% across the DTW–JFK route.
A bit behind the Delta Air Lines network.
DL 2934 arrived on time 76% of the time, versus 81% across the Delta Air Lines network.
Trending in the right direction.
DL 2934 arrived on time 87% of the time over the last three months in the data, compared with 67% in the three months before that.
The breakdown
- Mon75%(47 flights)
- Tue80%(49 flights)
- Wed78%(37 flights)
- Thu74%(49 flights)
- Fri76%(49 flights)
- Sat75%(32 flights)
- Sun76%(45 flights)
93%
May
Jun 47% → May 93% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 47% | 30 |
| July 2025 | 70% | 27 |
| August 2025 | 86% | 29 |
| September 2025 | 83% | 30 |
| October 2025 | 77% | 30 |
| November 2025 | 83% | 30 |
| December 2025 | 47% | 19 |
| January 2026 | 77% | 22 |
| February 2026 | 75% | 20 |
| March 2026 | 83% | 23 |
| April 2026 | 86% | 21 |
| May 2026 | 93% | 27 |
- Departures on time
- 71%
- Diverted
- 0.9%
- Flights flown
- 308
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 319 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.