Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SKYWEST · FLIGHT OO 4120
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
OO 4120 · ROC → DTW
departs 12:33 PM ET · arrives 1:55 PM ET
Forecast issued Thu 11:00 PM ET · 14h before departure
Watch this flight
Other days
Today
Sun 10/4 13%
Mon 10/5 13%
Tue 10/6 10%
Wed 10/7 14%
Odds over time
Arrive at DTW more than 15 minutes late?
22%
chance · ±0 pts
+3 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
22%
Leave 15+ late
24%
Arrive 1h+ late
13%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
3.6d
2d
1d
Now
6h
Departs
Lands
Arrive at DTW more than 15 minutes late?
Calm-weather odds: 13% · changed +3 pts in 24h
+3 pts
22%
Yes 22%
No 78%
Leave ROC more than 15 minutes late?
Calm-weather odds: 17% · changed +2 pts in 24h
+2 pts
24%
Yes 24%
No 76%
Arrive at DTW more than an hour late?
Calm-weather odds: 9% · changed +0 pts in 24h
+0 pts
13%
Yes 13%
No 87%
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
77%
15–30 min late
8%
30 min–1 hour late
<1%
1–2 hours late
7%
Over 2 hours late
6%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 500 ft, visibility down to 2 mi, 0.6 in of rain forecast at ROC that day
↑
Cloud base down to 700 ft, visibility down to 1.64286 mi, 1.0 in of rain forecast at DTW that day
↑
This flight has been late 21% of the time recently
↓
DTW usually runs smoothly
↓
Arrivals into DTW at that hour are usually not late
Weather at each end
ROC (origin)
Gusts 17 kt Ceiling 500 ft Visibility 2 mi Precip 0.59 in
DTW (destination)
Gusts 17 kt Ceiling 700 ft Visibility 1.64286 mi Precip 0.96 in
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.