Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 843
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Yesterday
WN 843 · SAN → SLC
departs 1:50 PM PT · arrives 4:45 PM MT
Forecast issued Tue 10:00 PM ET · 5h after departure
Watch this flight
Other days
Tue 9/29
Today 46%
Tue 10/6 27%
Odds over time
Arrive at SLC more than 15 minutes late?
30%
chance · ±0 pts
+3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
30%
Leave 15+ late
28%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 30% · changed +3 pts in 24h
+3 pts
30%
Yes 30%
No 70%
Leave SAN more than 15 minutes late?
Calm-weather odds: 28% · changed +0 pts in 24h
+0 pts
28%
Yes 28%
No 72%
Arrive at SLC more than an hour late?
Calm-weather odds: 4% · changed +0 pts in 24h
+0 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SLC?
On time or early
70%
15–30 min late
18%
30 min–1 hour late
7%
1–2 hours late
3%
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
↑
1pm departures from SAN are often late
↑
This flight has been late 23% of the time recently
↑
SAN is prone to delays
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at SAN
Weather at each end
SAN (origin)
Gusts 22 kt Ceiling 1,700 ft Visibility 10+ mi Precip none
SLC (destination)
Gusts 15 kt Ceiling 6,500 ft 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.