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 1242
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
WN 1242 · SLC → LAS
departs 11:05 AM MT · arrives 11:30 AM PT
Forecast issued Tue 6:00 PM ET · 43h before departure
Watch this flight
Other days
Thu 10/1
Fri 10/2 14%
Sat 10/3 3%
Sun 10/4 17%
Mon 10/5 12%
Odds over time
Arrive at LAS more than 15 minutes late?
11%
chance · ±2 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
11%
Leave 15+ late
13%
Arrive 1h+ late
2%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.8d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 11% · changed −1 pt in 24h
−1 pt
11%
Yes 11%
No 89%
Leave SLC more than 15 minutes late?
Calm-weather odds: 13% · changed +0 pts in 24h
+0 pts
13%
Yes 13%
No 87%
Arrive at LAS more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
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
89%
15–30 min late
6%
30 min–1 hour late
2%
1–2 hours late
2%
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
↑
LAS is prone to delays
↑
This flight has been late 20% of the time recently
↑
Other factors
↓
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.