Flight OddsUA543 BUF → ORD
United Airlines · Buffalo, NY to Chicago, IL · 139 flights observed, 2026-02-12 to 2026-06-30 · 474 mi
UA543 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
84%
Median delay
-3 min
90th percentile
+29 min
Cancellation rate
3%
How often is UA543 on time?
Across 139 flights on BUF → ORD from 2026-02-12 to 2026-06-30, UA543 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +29 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 114 | 84% |
| 16-30 min | 8 | 6% |
| 31-60 min | 7 | 5% |
| 61-120 min | 2 | 1% |
| 2+ hrs | 4 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 16 | 75% | +13 min |
| 2026-03 | 30 | 83% | +5 min |
| 2026-04 | 29 | 76% | +12 min |
| 2026-05 | 31 | 90% | +7 min |
| 2026-06 | 29 | 93% | -3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 19 | 89% |
| Tue | 20 | 90% |
| Wed | 19 | 79% |
| Thu | 19 | 84% |
| Fri | 18 | 78% |
| Sat | 20 | 85% |
| Sun | 20 | 85% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…