Flight OddsAA4391 PWM → ORD
American Airlines · Portland, ME to Chicago, IL · 131 flights observed, 2025-07-06 to 2026-06-30 · 900 mi
AA4391 covers more than one route in the data window — the stats below are for PWM → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
83%
Median delay
-7 min
90th percentile
+21 min
Cancellation rate
3%
How often is AA4391 on time?
Across 131 flights on PWM → ORD from 2025-07-06 to 2026-06-30, AA4391 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +21 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 | 105 | 83% |
| 16-30 min | 11 | 9% |
| 31-60 min | 2 | 2% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 8 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 25 | 92% | +9 min |
| 2025-08 | 5 | 80% | +50 min |
| 2025-09 | 27 | 78% | +13 min |
| 2025-10 | 31 | 68% | +13 min |
| 2025-11 | 1 | 100% | +11 min |
| 2026-05 | 10 | 90% | -9 min |
| 2026-06 | 27 | 96% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 19 | 84% |
| Tue | 18 | 83% |
| Wed | 18 | 83% |
| Thu | 17 | 88% |
| Fri | 18 | 100% |
| Sat | 17 | 71% |
| Sun | 19 | 74% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…