Flight OddsAA6399 STL → ORD
American Airlines · St. Louis, MO to Chicago, IL · 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 STL → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
78%
Median delay
0 min
90th percentile
+65 min
Cancellation rate
9%
How often is AA6399 on time?
Across 44 flights on STL → ORD from 2026-04-07 to 2026-05-20, AA6399 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +65 min or later. 9% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 31 | 78% |
| 16-30 min | 1 | 3% |
| 31-60 min | 3 | 8% |
| 61-120 min | 3 | 8% |
| 2+ hrs | 2 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 22 | 82% | +8 min |
| 2026-05 | 18 | 72% | +13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 0% |
| Tue | 7 | 71% |
| Wed | 7 | 100% |
| Thu | 6 | 67% |
| Fri | 5 | 60% |
| Sat | 6 | 100% |
| Sun | 6 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…