Flight Reliability
DL 369 · Delta Air Lines
Detroit → San Diego (DTW–SAN)
73
Usually Fine
WanderNerd Reliability Score
- 72%
- Arrive within 15 minutes
- 13 min
- Average arrival delay
- 0.8%
- Cancelled
- 1 min
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 369 arrived on time 81% of the time on Tuesdays and just 62% on Fridays. That gap is worth planning around.
A bit behind the DTW–SAN route.
DL 369 arrived on time 72% of the time, versus 77% across the DTW–SAN route.
Lagging the Delta Air Lines network.
DL 369 arrived on time 72% of the time, versus 81% across the Delta Air Lines network.
Trending in the right direction.
DL 369 arrived on time 78% of the time over the last three months in the data, compared with 57% in the three months before that.
The breakdown
- Mon64%(52 flights)
- Tue81%(52 flights)
- Wed73%(51 flights)
- Thu72%(50 flights)
- Fri62%(52 flights)
- Sat73%(52 flights)
- Sun78%(50 flights)
68%
May
Jun 57% → May 68% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 57% | 30 |
| July 2025 | 65% | 31 |
| August 2025 | 84% | 31 |
| September 2025 | 90% | 29 |
| October 2025 | 87% | 31 |
| November 2025 | 72% | 29 |
| December 2025 | 53% | 30 |
| January 2026 | 48% | 29 |
| February 2026 | 68% | 28 |
| March 2026 | 80% | 30 |
| April 2026 | 87% | 30 |
| May 2026 | 68% | 31 |
- Departures on time
- 76%
- Diverted
- 0.5%
- Flights flown
- 359
- 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.