Flight OddsAA4321 ORD → ALO
American Airlines · Chicago, IL to Waterloo, IA · 329 flights observed, 2025-07-01 to 2026-06-02 · 234 mi
AA4321 covers more than one route in the data window — the stats below are for ORD → ALO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
69%
Median delay
-2 min
90th percentile
+82 min
Cancellation rate
4%
How often is AA4321 on time?
Across 329 flights on ORD → ALO from 2025-07-01 to 2026-06-02, AA4321 arrived within 15 minutes of schedule 69% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +82 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 | 215 | 69% |
| 16-30 min | 27 | 9% |
| 31-60 min | 25 | 8% |
| 61-120 min | 29 | 9% |
| 2+ hrs | 15 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 28 | 57% | +66 min |
| 2025-08 | 31 | 81% | +4 min |
| 2025-09 | 27 | 70% | +4 min |
| 2025-10 | 30 | 80% | +1 min |
| 2025-11 | 25 | 76% | +3 min |
| 2025-12 | 25 | 56% | +40 min |
| 2026-01 | 30 | 53% | +35 min |
| 2026-02 | 28 | 89% | +6 min |
| 2026-03 | 28 | 68% | +10 min |
| 2026-04 | 27 | 44% | +43 min |
| 2026-05 | 30 | 80% | +4 min |
| 2026-06 | 2 | 100% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 48 | 65% |
| Tue | 46 | 76% |
| Wed | 45 | 60% |
| Thu | 43 | 63% |
| Fri | 42 | 71% |
| Sat | 44 | 80% |
| Sun | 43 | 70% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…