Flight Reliability
DL 841 · Delta Air Lines
Salt Lake City → Los Angeles (SLC–LAX)
89
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 0%
- Cancelled
- 4 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 841 arrived on time 90% of the time on Tuesdays and just 68% on Sundays. That gap is worth planning around.
A bit behind the SLC–LAX route.
DL 841 arrived on time 81% of the time, versus 87% across the SLC–LAX route.
It basically never cancels.
Out of 365 scheduled flights, only 0.0% were cancelled.
Ticking up lately.
DL 841 arrived on time 83% of the time over the last three months in the data, compared with 79% in the three months before that.
The breakdown
- Mon81%(52 flights)
- Tue90%(52 flights)
- Wed79%(52 flights)
- Thu81%(52 flights)
- Fri85%(52 flights)
- Sat83%(52 flights)
- Sun68%(53 flights)
77%
May
Jun 90% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 90% | 30 |
| July 2025 | 81% | 31 |
| August 2025 | 74% | 31 |
| September 2025 | 83% | 30 |
| October 2025 | 87% | 31 |
| November 2025 | 70% | 30 |
| December 2025 | 71% | 31 |
| January 2026 | 77% | 31 |
| February 2026 | 89% | 28 |
| March 2026 | 87% | 31 |
| April 2026 | 83% | 30 |
| May 2026 | 77% | 31 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 365
- 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.