Flight OddsAmerican Airlines · Champaign/Urbana, IL to Chicago, IL · 132 flights observed, 2025-07-02 to 2026-06-30 · 135 mi
AA3421 covers more than one route in the data window — the stats below are for CMI → ORD, the one it has flown most recently. The others are linked under “Other routes”.
How often is AA3421 on time?
Across 132 flights on CMI → ORD from 2025-07-02 to 2026-06-30, AA3421 arrived within 15 minutes of schedule 82% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +66 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 106 | 82% |
| 16-30 min | 7 | 5% |
| 31-60 min | 3 | 2% |
| 61-120 min | 5 | 4% |
| 2+ hrs | 9 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 26 | 77% | +13 min |
| 2025-08 | 26 | 77% | +6 min |
| 2025-09 | 1 | 0% | +88 min |
| 2026-04 | 20 | 90% | -6 min |
| 2026-05 | 28 | 86% | -1 min |
| 2026-06 | 29 | 83% | +74 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 21 | 76% |
| Tue | 6 | 83% |
| Wed | 21 | 81% |
| Thu | 20 | 90% |
| Fri | 21 | 86% |
| Sat | 21 | 90% |
| Sun | 20 | 65% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…