Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SKYWEST · FLIGHT OO 3940
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
OO 3940 · COS → SLC
departs 8:10 AM MT · arrives 10:09 AM MT
Forecast issued Wed 10:00 AM ET · 0h before departure
Watch this flight
Other days
Today
Thu 10/1 6%
Fri 10/2 4%
Sat 10/3 5%
Sun 10/4 5%
Mon 10/5 4%
Tue 10/6 4%
Odds over time
Arrive at SLC more than 15 minutes late?
7%
chance · ±0 pts
+0 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
7%
Leave 15+ late
10%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
7%
Yes 7%
No 93%
Leave COS more than 15 minutes late?
Calm-weather odds: 8% · changed −1 pt in 24h
−1 pt
10%
Yes 10%
No 90%
Arrive at SLC more than an hour late?
Calm-weather odds: 3% · changed −2 pts in 24h
−2 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 99%
How late will it get to SLC?
On time or early
92%
15–30 min late
1%
30 min–1 hour late
3%
1–2 hours late
0%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Gusts to 36 kt, cloud base down to 1,300 ft, 0.8 in of rain forecast at COS that day
↑
OO's recent on-time record
↑
COS is prone to delays
↓
This flight has been late 5% of the time recently
↓
SLC usually runs smoothly
Weather at each end
COS (origin)
Gusts 36 kt Ceiling 1,300 ft Visibility 3 mi Precip 0.75 in
SLC (destination)
Gusts 16 kt Ceiling none (clear) Visibility 10+ 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.