Flight Reliability
DL 3573 · Delta Air Lines
San Diego → Las Vegas (SAN–LAS)99% of its flights flew this route. The rest (DTW–PVD) are included in these numbers.
86
Pretty Reliable
WanderNerd Reliability Score
- 80%
- Arrive within 15 minutes
- 11 min
- Average arrival delay
- 0.5%
- Cancelled
- 8 min early
- Median arrival delay
Based on 195 historical flights. Data through May 2026.
What the data says
Mornings have a slight edge.
Departures between 6–9 AM arrived on time 86% of the time, against 80% between 9 AM–12 PM.
Friday is doing you no favors.
DL 3573 arrived on time 89% of the time on Thursdays and just 70% on Fridays. That gap is worth planning around.
A bit ahead of the SAN–LAS route.
DL 3573 arrived on time 80% of the time, versus 75% across the SAN–LAS route.
The breakdown
- Mon82%(28 flights)
- Tue79%(28 flights)
- Wed82%(28 flights)
- Thu89%(28 flights)
- Fri70%(27 flights)
- Sat74%(27 flights)
- Sun86%(28 flights)
- 6–9 AM86%(29 flights)
- 9 AM–12 PM80%(164 flights)
- 9 PM–12 AM—(1 flights)
90%
Dec
Jun 83% → Dec 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 24 |
| July 2025 | 81% | 31 |
| August 2025 | 81% | 31 |
| September 2025 | 77% | 30 |
| October 2025 | 84% | 31 |
| November 2025 | 71% | 28 |
| December 2025 | 90% | 19 |
- Departures on time
- 84%
- Diverted
- 0%
- Flights flown
- 194
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 195 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.