Schedule: the flights that flew on Wednesday, Oct 21, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3677
SCHEDULED · TYPICAL SCHEDULE
Wednesday, October 28 Tomorrow
WN 3677 · SAN → SFO
departs 1:39 PM PT · arrives 3:09 PM PT
Forecast issued Tue 2:00 AM ET · 39h before departure
Watch this flight
Other days
Today 46%
Wed 10/28
Thu 10/29 33%
Fri 10/30 42%
Sun 11/1 46%
Mon 11/2 43%
Odds over time
Arrive at SFO more than 15 minutes late?
41%
chance · ±3 pts
+8 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
41%
Leave 15+ late
31%
Arrive 1h+ late
11%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.7d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SFO more than 15 minutes late?
Calm-weather odds: 30% · changed +8 pts in 24h
+8 pts
41%
Yes 41%
No 59%
Leave SAN more than 15 minutes late?
Calm-weather odds: 28% · changed +3 pts in 24h
+3 pts
31%
Yes 31%
No 69%
Arrive at SFO more than an hour late?
Calm-weather odds: 8% · changed +0 pts in 24h
+0 pts
11%
Yes 11%
No 89%
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
58%
15–30 min late
19%
30 min–1 hour late
11%
1–2 hours late
8%
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 33% 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 October are usually quieter than average
Weather at each end
SAN (origin)
Gusts 11 kt Ceiling 3,500 ft Visibility 10+ 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.