Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4225
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 4225 · LAS → SLC
departs 7:05 PM PT · arrives 9:35 PM MT
Forecast issued Fri 9:00 AM ET · 61h before departure
Watch this flight
Other days
Today 37%
Sun 10/4
Mon 10/5 22%
Tue 10/6 17%
Wed 10/7 16%
Odds over time
Arrive at SLC more than 15 minutes late?
35%
chance · ±6 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
35%
Leave 15+ late
47%
Arrive 1h+ late
10%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.0d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 30% · changed – in 24h
–
35%
Yes 35%
No 65%
Leave LAS more than 15 minutes late?
Calm-weather odds: 43% · changed – in 24h
–
47%
Yes 47%
No 53%
Arrive at SLC more than an hour late?
Calm-weather odds: 7% · changed – in 24h
–
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 100%
How late will it get to SLC?
On time or early
65%
15–30 min late
13%
30 min–1 hour late
12%
1–2 hours late
7%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Later flights pick up delays from earlier in the day
↑
7pm departures from LAS are often late
↑
This flight has been late 44% of the time recently
↓
Mostly benign weather forecast at LAS
↓
Mostly benign weather forecast at SLC
Weather at each end
LAS (origin)
Gusts 12 kt Ceiling none (clear) Visibility 10+ mi Precip none
SLC (destination)
Gusts 11 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.