Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4338
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
WN 4338 · SLC → LAS
departs 2:50 PM MT · arrives 3:15 PM PT
Forecast issued Tue 5:00 PM ET · 48h before departure
Watch this flight
Other days
Today 56%
Wed 9/30 28%
Thu 10/1
Fri 10/2 29%
Mon 10/5 21%
Odds over time
Arrive at LAS more than 15 minutes late?
27%
chance · ±4 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
27%
Leave 15+ late
32%
Arrive 1h+ late
5%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
Now
1d
12h
6h
Departs
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 25% · changed −1 pt in 24h
−1 pt
27%
Yes 27%
No 73%
Leave SLC more than 15 minutes late?
Calm-weather odds: 32% · changed +0 pts in 24h
+0 pts
32%
Yes 32%
No 68%
Arrive at LAS more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to LAS?
On time or early
73%
15–30 min late
10%
30 min–1 hour late
11%
1–2 hours late
4%
Over 2 hours late
1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
WN's recent on-time record
↑
LAS is prone to delays
↑
Arrivals into LAS at that hour are often late
↓
Mostly benign weather forecast at LAS
↓
Mostly benign weather forecast at SLC
Weather at each end
SLC (origin)
Gusts 12 kt Ceiling none (clear) Visibility 10+ mi Precip none
LAS (destination)
Gusts 10 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.