Flight Reliability
DL 2663 · Delta Air Lines
Denver → Salt Lake City (DEN–SLC)
73
Usually Fine
WanderNerd Reliability Score
- 70%
- Arrive within 15 minutes
- 17 min
- Average arrival delay
- 0%
- Cancelled
- 3 min
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 2663 arrived on time 78% of the time on Saturdays and just 62% on Sundays. That gap is worth planning around.
Lagging the DEN–SLC route.
DL 2663 arrived on time 70% of the time, versus 78% across the DEN–SLC route.
Lagging the Delta Air Lines network.
DL 2663 arrived on time 70% of the time, versus 81% across the Delta Air Lines network.
It basically never cancels.
Out of 365 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon69%(52 flights)
- Tue71%(52 flights)
- Wed71%(52 flights)
- Thu67%(52 flights)
- Fri69%(52 flights)
- Sat78%(51 flights)
- Sun62%(53 flights)
81%
May
Jun 60% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 60% | 30 |
| July 2025 | 48% | 31 |
| August 2025 | 68% | 31 |
| September 2025 | 87% | 30 |
| October 2025 | 80% | 30 |
| November 2025 | 83% | 30 |
| December 2025 | 52% | 31 |
| January 2026 | 68% | 31 |
| February 2026 | 68% | 28 |
| March 2026 | 77% | 31 |
| April 2026 | 67% | 30 |
| May 2026 | 81% | 31 |
- Departures on time
- 72%
- Diverted
- 0.3%
- Flights flown
- 364
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 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.