Flight OddsUA520 SAN → SFO
United Airlines · San Diego, CA to San Francisco, CA · 30 flights observed, 2026-05-21 to 2026-06-20 · 447 mi
UA520 covers more than one route in the data window — the stats below are for SAN → SFO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
50%
Median delay
+15 min
90th percentile
+78 min
Cancellation rate
0%
How often is UA520 on time?
Across 30 flights on SAN → SFO from 2026-05-21 to 2026-06-20, UA520 arrived within 15 minutes of schedule 50% of the time. The median arrival delay was +15 min, and the worst 10% of flights arrived +78 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 15 | 50% |
| 16-30 min | 9 | 30% |
| 31-60 min | 2 | 7% |
| 61-120 min | 2 | 7% |
| 2+ hrs | 2 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 11 | 18% | +58 min |
| 2026-06 | 19 | 68% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 75% |
| Tue | 4 | 50% |
| Wed | 4 | 75% |
| Thu | 5 | 40% |
| Fri | 4 | 25% |
| Sat | 5 | 40% |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…