Flight Reliability
DL 810 · Delta Air Lines
Seattle → Detroit (SEA–DTW)
85
Pretty Reliable
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 1.7%
- Cancelled
- 5 min early
- Median arrival delay
Based on 361 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 810 arrived on time 94% of the time on Tuesdays and just 78% on Fridays. That gap is worth planning around.
Slipping a little lately.
DL 810 arrived on time 86% of the time over the last three months in the data, compared with 91% in the three months before that.
The breakdown
- Mon86%(51 flights)
- Tue94%(52 flights)
- Wed88%(51 flights)
- Thu80%(51 flights)
- Fri78%(50 flights)
- Sat83%(48 flights)
- Sun79%(52 flights)
87%
May
Jun 83% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 29 |
| July 2025 | 67% | 30 |
| August 2025 | 65% | 31 |
| September 2025 | 83% | 30 |
| October 2025 | 90% | 30 |
| November 2025 | 93% | 29 |
| December 2025 | 93% | 30 |
| January 2026 | 90% | 31 |
| February 2026 | 89% | 27 |
| March 2026 | 89% | 28 |
| April 2026 | 83% | 30 |
| May 2026 | 87% | 30 |
- Departures on time
- 75%
- Diverted
- 0%
- Flights flown
- 355
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 361 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.