Flight OddsUA3431 BUF → ORD
United Airlines · Buffalo, NY to Chicago, IL · 32 flights observed, 2025-07-13 to 2025-12-01 · 474 mi
UA3431 covers more than one route in the data window — the stats below are for BUF → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
81%
Median delay
-4 min
90th percentile
+80 min
Cancellation rate
0%
How often is UA3431 on time?
Across 32 flights on BUF → ORD from 2025-07-13 to 2025-12-01, UA3431 arrived within 15 minutes of schedule 81% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +80 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 | 26 | 81% |
| 16-30 min | 2 | 6% |
| 31-60 min | 0 | 0% |
| 61-120 min | 2 | 6% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 2 | 50% | +52 min |
| 2025-10 | 5 | 100% | -7 min |
| 2025-11 | 24 | 83% | +14 min |
| 2025-12 | 1 | 0% | +18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 75% |
| Tue | 4 | 100% |
| Wed | 4 | 100% |
| Thu | 5 | 80% |
| Fri | 4 | 100% |
| Sat | 5 | 60% |
| Sun | 6 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…