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 3103
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Yesterday
WN 3103 · MDW → SAN
departs 6:10 AM CT · arrives 8:20 AM PT
Forecast issued Wed 10:00 PM ET · 15h after departure
Watch this flight
Other days
Wed 9/30
Today 16%
Fri 10/2 13%
Sun 10/4 11%
Mon 10/5 10%
Tue 10/6 8%
Wed 10/7 9%
Odds over time
Arrive at SAN more than 15 minutes late?
22%
chance · ±0 pts
+4 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
22%
Leave 15+ late
6%
Arrive 1h+ late
5%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.7d
2d
1d
12h
6h
Departs
Lands
Arrive at SAN more than 15 minutes late?
Calm-weather odds: 22% · changed +4 pts in 24h
+4 pts
22%
Yes 22%
No 78%
Leave MDW more than 15 minutes late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
6%
Yes 6%
No 94%
Arrive at SAN more than an hour late?
Calm-weather odds: 5% · changed +2 pts in 24h
+2 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 SAN?
On time or early
77%
15–30 min late
15%
30 min–1 hour late
2%
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
↑
Cloud base down to 800 ft, visibility down to 2.5 mi, 0.8 in of rain forecast at MDW that day
↑
SAN is prone to delays
↑
MDW is prone to delays
↓
Early flights usually leave on time
↓
6am departures from MDW are usually not late
Weather at each end
MDW (origin)
Gusts 21 kt Ceiling 700 ft Visibility 2.5 mi Precip 0.94 in
SAN (destination)
Gusts 17 kt Ceiling 700 ft Visibility 8 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.