WN3431Southwest Airlines · SAN → MDW
live · 4m ago
Route confirmed Southwest Airlines

WN3431 San DiegoSAN ChicagoMDW

WN3431 by Southwest Airlines flies from San Diego (SAN) to Chicago (MDW).

Right nowNext departure today Operates daily
19:00

scheduled from SAN

The route today

live boards
SANSan DiegoOn-time likelySAN delay board →
MDWChicagoOn-time likelyMDW delay board →
SAN→MDWevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
53%Chance of 15+ min delay
1.3%Chance of cancellation
+18 minTypical airport delay in this weather

Conditions at SAN and MDW are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow on this route

Forecast

San Diego to Chicago with Southwest Airlines · Sat 31 Oct, local date

Outlook: about usual
Chance a departure is cancelled
0.2%4.3× usual
Chance a departure leaves 60+ min late
9.9%1.0× usual

Forecast weather: 83% chance of rain at San Diego; 91% chance of rain at Chicago

Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 3 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other San Diego to Chicago flights today

same route · Southwest Airlines
WN2772departs 06:15
WN4237departs 06:15
WN1785departs 06:30
WN3370departs 11:15
WN1252departs 11:55
WN1301departs 12:25

If WN3431 is cancelled, these are the other Southwest Airlines nonstop flights from San Diego to Chicago on the same day, with scheduled departure times in SAN local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How WN3431 actually runs

Pro Flight Search has tracked every published board update for WN3431 across the SAN and MDW boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at SAN and MDW.

The verdict above is that record speaking, so it reflects how WN3431 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around WN3431? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: WN3431 San Diego to Chicago on-time performance, measured from the SAN and MDW airport boards.

Canonical URL
https://proflightsearch.com/flight/WN3431
How we measure this →