Flight OddsUA1278 SMF → ORD
United Airlines · Sacramento, CA to Chicago, IL · 218 flights observed, 2025-09-25 to 2026-05-20 · 1,781 mi
UA1278 covers more than one route in the data window — the stats below are for SMF → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
85%
Median delay
-10 min
90th percentile
+33 min
Cancellation rate
1%
How often is UA1278 on time?
Across 218 flights on SMF → ORD from 2025-09-25 to 2026-05-20, UA1278 arrived within 15 minutes of schedule 85% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +33 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 | 182 | 85% |
| 16-30 min | 10 | 5% |
| 31-60 min | 10 | 5% |
| 61-120 min | 6 | 3% |
| 2+ hrs | 6 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 6 | 100% | -15 min |
| 2025-10 | 30 | 100% | -14 min |
| 2025-11 | 27 | 89% | -1 min |
| 2025-12 | 17 | 82% | +4 min |
| 2026-01 | 26 | 65% | +16 min |
| 2026-02 | 28 | 93% | -4 min |
| 2026-03 | 31 | 77% | +15 min |
| 2026-04 | 29 | 93% | -1 min |
| 2026-05 | 20 | 70% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 31 | 84% |
| Tue | 32 | 88% |
| Wed | 31 | 81% |
| Thu | 29 | 93% |
| Fri | 31 | 81% |
| Sat | 30 | 93% |
| Sun | 30 | 77% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…