Flight Reliability
UA 5951 · United Airlines
SBP → San Francisco (SBP–SFO)
80
Pretty Reliable
WanderNerd Reliability Score
- 72%
- Arrive within 15 minutes
- 10 min
- Average arrival delay
- 0%
- Cancelled
- 4 min early
- Median arrival delay
Based on 351 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
UA 5951 arrived on time 80% of the time on Tuesdays and just 64% on Mondays. That gap is worth planning around.
A bit ahead of the SBP–SFO route.
UA 5951 arrived on time 72% of the time, versus 66% across the SBP–SFO route.
Lagging the United Airlines network.
UA 5951 arrived on time 72% of the time, versus 79% across the United Airlines network.
It basically never cancels.
Out of 351 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon64%(50 flights)
- Tue80%(50 flights)
- Wed66%(50 flights)
- Thu76%(50 flights)
- Fri70%(50 flights)
- Sat74%(50 flights)
- Sun73%(51 flights)
80%
May
Jun 83% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 30 |
| July 2025 | 87% | 31 |
| August 2025 | 87% | 31 |
| September 2025 | 85% | 27 |
| October 2025 | 77% | 31 |
| November 2025 | 77% | 30 |
| December 2025 | 71% | 31 |
| January 2026 | 71% | 31 |
| February 2026 | 50% | 28 |
| March 2026 | 74% | 31 |
| April 2026 | 20% | 30 |
| May 2026 | 80% | 20 |
- Departures on time
- 78%
- Diverted
- 0%
- Flights flown
- 351
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 351 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.