Flight Reliability
DL 3837 · Delta Air Lines
SBN → Detroit (SBN–DTW)
75
Usually Fine
WanderNerd Reliability Score
- 80%
- Arrive within 15 minutes
- 22 min
- Average arrival delay
- 1.4%
- Cancelled
- 10 min early
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
DL 3837 arrived on time 90% of the time on Thursdays and just 69% on Mondays. That gap is worth planning around.
Trending in the right direction.
DL 3837 arrived on time 87% of the time over the last three months in the data, compared with 53% in the three months before that.
The breakdown
- Mon69%(52 flights)
- Tue83%(52 flights)
- Wed75%(52 flights)
- Thu90%(51 flights)
- Fri74%(50 flights)
- Sat88%(51 flights)
- Sun78%(50 flights)
93%
May
Jun 90% → May 93% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 90% | 29 |
| July 2025 | 90% | 31 |
| August 2025 | 90% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 94% | 31 |
| November 2025 | 79% | 29 |
| December 2025 | 53% | 30 |
| January 2026 | 52% | 29 |
| February 2026 | 54% | 28 |
| March 2026 | 77% | 30 |
| April 2026 | 90% | 30 |
| May 2026 | 93% | 30 |
- Departures on time
- 80%
- Diverted
- 0.3%
- Flights flown
- 358
- 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.