Flight Reliability
DL 1304 · Delta Air Lines
Salt Lake City → Santa Ana (SLC–SNA)
91
Nerd Approved
WanderNerd Reliability Score
- 85%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 0%
- Cancelled
- 8 min early
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
9 PM–12 AM has a slight edge.
Departures between 9 PM–12 AM arrived on time 87% of the time, against 83% between 6–9 PM.
Friday is doing you no favors.
DL 1304 arrived on time 94% of the time on Saturdays and just 79% on Fridays. That gap is worth planning around.
A bit ahead of the Delta Air Lines network.
DL 1304 arrived on time 85% of the time, versus 81% across the Delta Air Lines network.
It basically never cancels.
Out of 364 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon89%(52 flights)
- Tue83%(52 flights)
- Wed83%(52 flights)
- Thu82%(50 flights)
- Fri79%(52 flights)
- Sat94%(52 flights)
- Sun87%(52 flights)
- 6–9 PM83%(187 flights)
- 9 PM–12 AM87%(175 flights)
94%
May
Jun 77% → May 94% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 77% | 30 |
| July 2025 | 90% | 31 |
| August 2025 | 90% | 30 |
| September 2025 | 83% | 30 |
| October 2025 | 74% | 31 |
| November 2025 | 93% | 29 |
| December 2025 | 77% | 30 |
| January 2026 | 94% | 31 |
| February 2026 | 86% | 28 |
| March 2026 | 90% | 31 |
| April 2026 | 73% | 30 |
| May 2026 | 94% | 31 |
- Departures on time
- 84%
- Diverted
- 0.5%
- Flights flown
- 362
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 364 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.