Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 2140
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 2140 · SAN → SFO
departs 8:30 AM PT · arrives 10:10 AM PT
Forecast issued Wed 12:00 PM ET · 0h before departure
Watch this flight
Other days
Today
Sun 10/4 33%
Tue 10/6 25%
Odds over time
Arrive at SFO more than 15 minutes late?
31%
chance · ±3 pts
−10 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
31%
Leave 15+ late
22%
Arrive 1h+ late
5%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at SFO more than 15 minutes late?
Calm-weather odds: 30% · changed −10 pts in 24h
−10 pts
31%
Yes 31%
No 69%
Leave SAN more than 15 minutes late?
Calm-weather odds: 22% · changed −17 pts in 24h
−17 pts
22%
Yes 22%
No 78%
Arrive at SFO more than an hour late?
Calm-weather odds: 5% · changed −6 pts in 24h
−6 pts
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SFO?
On time or early
68%
15–30 min late
20%
30 min–1 hour late
6%
1–2 hours late
4%
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
↑
This flight has been late 28% of the time recently
↑
Arrivals into SFO at that hour are often late
↑
SFO is prone to delays
↓
Mostly benign weather forecast at SFO
↓
Wednesdays in September are usually quieter than average
Weather at each end
SAN (origin)
Gusts 12 kt Ceiling 700 ft Visibility 8 mi Precip none
SFO (destination)
Gusts 13 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.