Flight Reliability
DL 2255 · Delta Air Lines
Salt Lake City → Detroit (SLC–DTW)
88
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 0%
- Cancelled
- 12 min early
- Median arrival delay
Based on 353 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 2255 arrived on time 85% of the time on Wednesdays. On Fridays: 77%.
Lagging the SLC–DTW route.
DL 2255 arrived on time 81% of the time, versus 89% across the SLC–DTW route.
It basically never cancels.
Out of 353 scheduled flights, only 0.0% were cancelled.
Slipping a little lately.
DL 2255 arrived on time 81% of the time over the last three months in the data, compared with 86% in the three months before that.
The breakdown
- Mon79%(52 flights)
- Tue83%(52 flights)
- Wed85%(52 flights)
- Thu80%(51 flights)
- Fri77%(52 flights)
- Sat81%(42 flights)
- Sun82%(51 flights)
- 12–3 PM—(1 flights)
- 3–6 PM—(9 flights)
- 6–9 PM81%(342 flights)
83%
May
Jun 63% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 30 |
| July 2025 | 65% | 31 |
| August 2025 | 74% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 94% | 31 |
| November 2025 | 86% | 29 |
| December 2025 | 87% | 31 |
| January 2026 | 93% | 27 |
| February 2026 | 77% | 22 |
| March 2026 | 73% | 30 |
| April 2026 | 87% | 30 |
| May 2026 | 83% | 30 |
- Departures on time
- 78%
- Diverted
- 0.3%
- Flights flown
- 352
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 353 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.