Flight OddsAA378 ORD → GRR
American Airlines · Chicago, IL to Grand Rapids, MI · 43 flights observed, 2026-04-08 to 2026-05-20 · 137 mi
AA378 covers more than one route in the data window — the stats below are for ORD → GRR, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
79%
Median delay
-14 min
90th percentile
+190 min
Cancellation rate
2%
How often is AA378 on time?
Across 43 flights on ORD → GRR from 2026-04-08 to 2026-05-20, AA378 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +190 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 | 33 | 79% |
| 16-30 min | 2 | 5% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 7 | 17% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 22 | 64% | +74 min |
| 2026-05 | 20 | 95% | -14 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 67% |
| Tue | 6 | 50% |
| Wed | 7 | 86% |
| Thu | 6 | 83% |
| Fri | 6 | 83% |
| Sat | 5 | 100% |
| Sun | 6 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…