Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SKYWEST · FLIGHT OO 4081
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Yesterday
OO 4081 · DTW → GRR
departs 8:00 PM ET · arrives 9:00 PM ET
Forecast issued Tue 10:00 PM ET · 2h after departure
Watch this flight
Other days
Tue 9/29
Today 42%
Thu 10/1 39%
Fri 10/2 26%
Sat 10/3 20%
Sun 10/4 22%
Mon 10/5 22%
Tue 10/6 20%
Odds over time
Arrive at GRR more than 15 minutes late?
18%
chance · ±0 pts
−1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
18%
Leave 15+ late
26%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
12h
6h
Departs
Lands
Now
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 17% · changed −1 pt in 24h
−1 pt
18%
Yes 18%
No 82%
Leave DTW more than 15 minutes late?
Calm-weather odds: 25% · changed +5 pts in 24h
+5 pts
26%
Yes 26%
No 74%
Arrive at GRR more than an hour late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to GRR?
On time or early
82%
15–30 min late
7%
30 min–1 hour late
5%
1–2 hours late
5%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
8pm departures from DTW are often late
↑
Later flights pick up delays from earlier in the day
↑
This flight has been late 29% of the time recently
↓
Mostly benign weather forecast at DTW
↓
Tuesdays in September are usually quieter than average
Weather at each end
DTW (origin)
Gusts 9 kt Ceiling none (clear) Visibility 9 mi Precip none
GRR (destination)
Gusts 8 kt Ceiling none (clear) Visibility 6 mi Precip none
How this resolves
Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.
Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.