Schedule: the flights that flew on Wednesday, Oct 7, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4270
SCHEDULED · TYPICAL SCHEDULE
Wednesday, October 14
WN 4270 · DEN → SLC
departs 8:39 PM MT · arrives 10:08 PM MT
Forecast issued Mon 10:00 AM ET · 61h before departure
Watch this flight
Other days
Today 67%
Tue 10/13 41%
Wed 10/14
Thu 10/15 34%
Fri 10/16 36%
Sat 10/17 24%
Sun 10/18 38%
Odds over time
Arrive at SLC more than 15 minutes late?
58%
chance · ±10 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
58%
Leave 15+ late
65%
Arrive 1h+ late
16%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
6.9d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 20% · changed – in 24h
–
58%
Yes 58%
No 42%
Leave DEN more than 15 minutes late?
Calm-weather odds: 27% · changed – in 24h
–
65%
Yes 65%
No 35%
Arrive at SLC more than an hour late?
Calm-weather odds: 3% · changed – in 24h
–
16%
Yes 16%
No 84%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to SLC?
On time or early
41%
15–30 min late
28%
30 min–1 hour late
14%
1–2 hours late
12%
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
↑
Cloud base down to 400 ft, visibility down to 0.6 mi, 0.5 in of rain forecast at DEN that day
↑
8pm departures from DEN are often late
↑
Later flights pick up delays from earlier in the day
↓
Wednesdays in October are usually quieter than average
Weather at each end
DEN (origin)
Gusts 20 kt Ceiling 400 ft Visibility 0.7 mi Precip 0.43 in
SLC (destination)
Gusts 17 kt Ceiling 3,900 ft Visibility 10+ mi Precip 0.04 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.