Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SKYWEST · FLIGHT OO 6391
SCHEDULED · TYPICAL SCHEDULE
OO 6391 · ORD → GRR
departs 6:59 AM CT · arrives 9:11 AM ET
Forecast issued Tue 5:00 PM ET · 63h before departure
Odds over time
Arrive at GRR more than 15 minutes late?
22%
chance · ±2 pts
+12 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
-
-
-
-
How late will it get to GRR?
-
On time or early
76%
-
15–30 min late
<1%
-
30 min–1 hour late
11%
-
1–2 hours late
5%
-
Over 2 hours late
4%
-
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.