Flight OddsAA6399 ORD → STL
American Airlines · Chicago, IL to St. Louis, MO · 44 flights observed, 2026-04-07 to 2026-05-20 · 258 mi
AA6399 covers more than one route in the data window — the stats below are for ORD → STL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
67%
Median delay
0 min
90th percentile
+45 min
Cancellation rate
5%
How often is AA6399 on time?
Across 44 flights on ORD → STL from 2026-04-07 to 2026-05-20, AA6399 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +45 min or later. 5% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 28 | 67% |
| 16-30 min | 7 | 17% |
| 31-60 min | 6 | 14% |
| 61-120 min | 1 | 2% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 23 | 61% | +10 min |
| 2026-05 | 19 | 74% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 25% |
| Tue | 7 | 29% |
| Wed | 7 | 86% |
| Thu | 6 | 100% |
| Fri | 6 | 50% |
| Sat | 6 | 83% |
| Sun | 6 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…