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 4660
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2
OO 4660 · HLN → DEN
departs 6:15 AM MT · arrives 8:13 AM MT
Forecast issued Fri 10:00 PM ET · 14h after departure
Watch this flight
Other days
Fri 10/2
Today 5%
Mon 10/5 4%
Tue 10/6 4%
Wed 10/7 6%
Thu 10/8 5%
Fri 10/9 6%
Sat 10/10 5%
Odds over time
Arrive at DEN more than 15 minutes late?
5%
chance · ±0 pts
−6 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
5%
Leave 15+ late
5%
Arrive 1h+ late
5%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
3.4d
2d
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 5% · changed −6 pts in 24h
−6 pts
5%
Yes 5%
No 95%
Leave HLN more than 15 minutes late?
Calm-weather odds: 5% · changed −4 pts in 24h
−4 pts
5%
Yes 5%
No 95%
Arrive at DEN more than an hour late?
Calm-weather odds: 5% · changed −1 pt in 24h
−1 pt
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed −7 pts in 24h
−7 pts
<1%
Yes <1%
No 100%
How late will it get to DEN?
On time or early
95%
15–30 min late
<1%
30 min–1 hour late
0%
1–2 hours late
1%
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
↑
OO's recent on-time record
↓
Early flights usually leave on time
↓
Mostly benign weather forecast at HLN
Weather at each end
HLN (origin)
Gusts 23 kt Ceiling none (clear) Visibility 10+ mi Precip none
DEN (destination)
Gusts 17 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.