Flight OddsUA1231 LAS → ORD
United Airlines · Las Vegas, NV to Chicago, IL · 32 flights observed, 2026-01-06 to 2026-06-21 · 1,514 mi
UA1231 covers more than one route in the data window — the stats below are for LAS → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
100%
Median delay
-9 min
90th percentile
+2 min
Cancellation rate
0%
How often is UA1231 on time?
Across 32 flights on LAS → ORD from 2026-01-06 to 2026-06-21, UA1231 arrived within 15 minutes of schedule 100% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +2 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 | 32 | 100% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 17 | 100% | -7 min |
| 2026-02 | 8 | 100% | -16 min |
| 2026-05 | 4 | 100% | -8 min |
| 2026-06 | 3 | 100% | -19 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 6 | 100% |
| Wed | No data | — |
| Thu | 1 | 100% |
| Fri | 5 | 100% |
| Sat | 5 | 100% |
| Sun | 10 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…