Flight OddsUnited Airlines · San Francisco, CA to Chicago, IL · 111 flights observed, 2025-10-26 to 2026-03-04 · 1,846 mi
UA1557 covers more than one route in the data window — the stats below are for SFO → ORD, the one it has flown most recently. The others are linked under “Other routes”.
How often is UA1557 on time?
Across 111 flights on SFO → ORD from 2025-10-26 to 2026-03-04, UA1557 arrived within 15 minutes of schedule 68% of the time. The median arrival delay was +6 min, and the worst 10% of flights arrived +59 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 75 | 68% |
| 16-30 min | 10 | 9% |
| 31-60 min | 15 | 14% |
| 61-120 min | 6 | 5% |
| 2+ hrs | 4 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 83% | -5 min |
| 2025-11 | 29 | 72% | +23 min |
| 2025-12 | 17 | 76% | +11 min |
| 2026-01 | 26 | 65% | +21 min |
| 2026-02 | 28 | 57% | +20 min |
| 2026-03 | 4 | 75% | +12 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 16 | 63% |
| Tue | 17 | 76% |
| Wed | 16 | 50% |
| Thu | 15 | 67% |
| Fri | 15 | 87% |
| Sat | 15 | 73% |
| Sun | 16 | 63% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…