Flight OddsUA343 ORD → SFO
United Airlines · Chicago, IL to San Francisco, CA · 228 flights observed, 2025-08-01 to 2026-03-28 · 1,846 mi
UA343 covers more than one route in the data window — the stats below are for ORD → SFO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
77%
Median delay
-7 min
90th percentile
+55 min
Cancellation rate
1%
How often is UA343 on time?
Across 228 flights on ORD → SFO from 2025-08-01 to 2026-03-28, UA343 arrived within 15 minutes of schedule 77% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +55 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 | 173 | 77% |
| 16-30 min | 14 | 6% |
| 31-60 min | 18 | 8% |
| 61-120 min | 9 | 4% |
| 2+ hrs | 11 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 31 | 84% | -6 min |
| 2025-09 | 30 | 70% | +24 min |
| 2025-10 | 30 | 73% | +10 min |
| 2025-11 | 29 | 59% | +14 min |
| 2025-12 | 30 | 67% | +13 min |
| 2026-01 | 23 | 83% | -1 min |
| 2026-02 | 24 | 92% | +3 min |
| 2026-03 | 28 | 93% | -18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 33 | 79% |
| Tue | 28 | 82% |
| Wed | 27 | 81% |
| Thu | 34 | 82% |
| Fri | 35 | 77% |
| Sat | 35 | 66% |
| Sun | 33 | 73% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…