Flight OddsAA4340 BUF → ORD
American Airlines · Buffalo, NY to Chicago, IL · 25 flights observed, 2026-03-09 to 2026-04-06 · 474 mi
AA4340 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
79%
Median delay
-3 min
90th percentile
+57 min
Cancellation rate
4%
How often is AA4340 on time?
Across 25 flights on BUF → ORD from 2026-03-09 to 2026-04-06, AA4340 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +57 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 19 | 79% |
| 16-30 min | 1 | 4% |
| 31-60 min | 1 | 4% |
| 61-120 min | 2 | 8% |
| 2+ hrs | 1 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 19 | 79% | +7 min |
| 2026-04 | 5 | 80% | -5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 80% |
| Tue | 4 | 100% |
| Wed | 3 | 100% |
| Thu | 4 | 75% |
| Fri | 4 | 25% |
| Sat | 4 | 100% |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…