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 4120
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Yesterday
OO 4120 · ROC → DTW
departs 12:33 PM ET · arrives 1:55 PM ET
Forecast issued Tue 10:00 PM ET · 9h after departure
Watch this flight
Other days
Tue 9/29
Today 16%
Thu 10/1 16%
Fri 10/2 20%
Sun 10/4 13%
Mon 10/5 13%
Tue 10/6 10%
Odds over time
Arrive at DTW more than 15 minutes late?
13%
chance · ±0 pts
−1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
13%
Leave 15+ late
17%
Arrive 1h+ late
7%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at DTW more than 15 minutes late?
Calm-weather odds: 13% · changed −1 pt in 24h
−1 pt
13%
Yes 13%
No 87%
Leave ROC more than 15 minutes late?
Calm-weather odds: 17% · changed +0 pts in 24h
+0 pts
17%
Yes 17%
No 83%
Arrive at DTW more than an hour late?
Calm-weather odds: 8% · changed −1 pt in 24h
−1 pt
7%
Yes 7%
No 93%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to DTW?
On time or early
86%
15–30 min late
4%
30 min–1 hour late
1%
1–2 hours late
4%
Over 2 hours late
4%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
This flight has been late 26% of the time recently
↑
12pm departures from ROC are often late
↑
OO's recent on-time record
↓
Mostly benign weather forecast at DTW
↓
Tuesdays in September are usually quieter than average
Weather at each end
ROC (origin)
Gusts 5 kt Ceiling 800 ft Visibility 8.8 mi Precip 0.01 in
DTW (destination)
Gusts 9 kt Ceiling none (clear) Visibility 9 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.