Flight OddsAA3977 ORD → CHA
American Airlines · Chicago, IL to Chattanooga, TN · 97 flights observed, 2025-12-18 to 2026-05-06 · 501 mi
AA3977 covers more than one route in the data window — the stats below are for ORD → CHA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
77%
Median delay
-10 min
90th percentile
+66 min
Cancellation rate
3%
How often is AA3977 on time?
Across 97 flights on ORD → CHA from 2025-12-18 to 2026-05-06, AA3977 arrived within 15 minutes of schedule 77% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +66 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 72 | 77% |
| 16-30 min | 5 | 5% |
| 31-60 min | 7 | 7% |
| 61-120 min | 5 | 5% |
| 2+ hrs | 5 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 10 | 80% | +5 min |
| 2026-01 | 3 | 67% | -1 min |
| 2026-02 | 17 | 76% | +10 min |
| 2026-03 | 31 | 71% | +9 min |
| 2026-04 | 27 | 85% | -6 min |
| 2026-05 | 6 | 67% | +36 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 14 | 79% |
| Tue | 14 | 64% |
| Wed | 14 | 93% |
| Thu | 14 | 79% |
| Fri | 11 | 64% |
| Sat | 12 | 83% |
| Sun | 15 | 73% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…