Flight Reliability
DL 4054 · Delta Air Lines
Salt Lake City → Tucson (SLC–TUS)
91
Nerd Approved
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 0%
- Cancelled
- 5 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
DL 4054 arrived on time 92% of the time on Tuesdays and just 77% on Mondays. That gap is worth planning around.
A bit behind the SLC–TUS route.
DL 4054 arrived on time 84% of the time, versus 91% across the SLC–TUS route.
A bit ahead of the Delta Air Lines network.
DL 4054 arrived on time 84% 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
- Mon77%(52 flights)
- Tue92%(52 flights)
- Wed87%(52 flights)
- Thu82%(51 flights)
- Fri87%(52 flights)
- Sat87%(52 flights)
- Sun79%(53 flights)
90%
May
Jun 73% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 73% | 30 |
| July 2025 | 87% | 31 |
| August 2025 | 93% | 30 |
| September 2025 | 93% | 30 |
| October 2025 | 81% | 31 |
| November 2025 | 87% | 30 |
| December 2025 | 84% | 31 |
| January 2026 | 68% | 31 |
| February 2026 | 89% | 28 |
| March 2026 | 87% | 31 |
| April 2026 | 80% | 30 |
| May 2026 | 90% | 31 |
- Departures on time
- 86%
- 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.