Flight Reliability
UA 4643 · United Airlines
Los Angeles → San Diego (LAX–SAN)
90
Nerd Approved
WanderNerd Reliability Score
- 90%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 1.9%
- Cancelled
- 7 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
UA 4643 arrived on time 96% of the time on Tuesdays. On Fridays: 84%.
Better than the United Airlines network average.
UA 4643 arrived on time 90% of the time, versus 79% across the United Airlines network.
Ticking up lately.
UA 4643 arrived on time 91% of the time over the last three months in the data, compared with 88% in the three months before that.
The breakdown
- Mon87%(52 flights)
- Tue96%(52 flights)
- Wed89%(52 flights)
- Thu94%(50 flights)
- Fri84%(50 flights)
- Sat92%(50 flights)
- Sun89%(52 flights)
94%
May
Jun 93% → May 94% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 93% | 30 |
| July 2025 | 90% | 31 |
| August 2025 | 90% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 83% | 24 |
| December 2025 | 84% | 31 |
| January 2026 | 90% | 30 |
| February 2026 | 89% | 28 |
| March 2026 | 84% | 31 |
| April 2026 | 97% | 30 |
| May 2026 | 94% | 31 |
- Departures on time
- 92%
- Diverted
- 0%
- Flights flown
- 358
- 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.