Flight Reliability
DL 1434 · Delta Air Lines
Los Angeles → Salt Lake City (LAX–SLC)
95
Nerd Approved
WanderNerd Reliability Score
- 93%
- Arrive within 15 minutes
- 5 min early
- Average arrival delay
- 1.1%
- Cancelled
- 14 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Saturday has been the better bet.
A small edge: 94% on time on Saturdays against 90% on Sundays.
A bit ahead of the LAX–SLC route.
DL 1434 arrived on time 93% of the time, versus 88% across the LAX–SLC route.
Better than the Delta Air Lines network average.
DL 1434 arrived on time 93% of the time, versus 81% across the Delta Air Lines network.
Slipping a little lately.
DL 1434 arrived on time 89% of the time over the last three months in the data, compared with 92% in the three months before that.
The breakdown
- Mon94%(51 flights)
- Tue92%(50 flights)
- Wed94%(51 flights)
- Thu92%(52 flights)
- Fri92%(52 flights)
- Sat94%(52 flights)
- Sun90%(52 flights)
94%
May
Jun 97% → May 94% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 97% | 29 |
| July 2025 | 100% | 31 |
| August 2025 | 94% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 97% | 31 |
| November 2025 | 93% | 29 |
| December 2025 | 94% | 31 |
| January 2026 | 90% | 30 |
| February 2026 | 93% | 27 |
| March 2026 | 87% | 30 |
| April 2026 | 87% | 30 |
| May 2026 | 94% | 31 |
- Departures on time
- 90%
- Diverted
- 0.3%
- Flights flown
- 360
- 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.