Flight OddsSTL → SFO United Airlines
United Airlines · St. Louis, MO to San Francisco, CA · 440 flights, 2025-07-01 to 2026-06-30 · aggregated across 19 flight numbers
On-time arrival
65%
Median delay
+3 min
90th percentile
+90 min
Cancellation rate
1%
How on-time is United Airlines from STL to SFO?
Across every United Airlines flight number on STL → SFO (440 flights, 2025-07-01 to 2026-06-30), 65% arrived within 15 minutes of schedule. Median arrival delay +3 min; the worst 10% ran +90 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 280 | 65% |
| 16-30 min | 39 | 9% |
| 31-60 min | 43 | 10% |
| 61-120 min | 50 | 12% |
| 2+ hrs | 22 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 51 | 57% | +23 min |
| 2025-08 | 32 | 81% | +15 min |
| 2025-09 | 30 | 83% | -1 min |
| 2025-10 | 31 | 74% | +9 min |
| 2025-11 | 30 | 73% | +16 min |
| 2025-12 | 31 | 77% | +33 min |
| 2026-01 | 40 | 90% | -15 min |
| 2026-02 | 33 | 73% | +4 min |
| 2026-03 | 32 | 81% | +18 min |
| 2026-04 | 49 | 47% | +63 min |
| 2026-05 | 45 | 31% | +51 min |
| 2026-06 | 30 | 27% | +44 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 68 | 56% |
| Tue | 54 | 78% |
| Wed | 60 | 65% |
| Thu | 64 | 59% |
| Fri | 67 | 64% |
| Sat | 54 | 74% |
| Sun | 67 | 60% |
UA flight numbers on STL → SFO
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…