WN4310 San DiegoSAN · 16:40 SeattleSEA · 19:35
WN4310 by Southwest Airlines flies from San Diego (SAN) to Seattle (SEA) for the Mon, Sep 14 departure.
departs SAN · 52 min late
board checked 13m ago · checking again in 45s
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at SAN and SEA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other San Diego to Seattle flights today
same route · Southwest AirlinesIf WN4310 is cancelled, these are the other Southwest Airlines nonstop flights from San Diego to Seattle on the same day, with scheduled departure times in SAN local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN4310 actually runs
Pro Flight Search has tracked every published board update for WN4310 across the SAN and SEA boards: schedule changes, gate pushes and actual clocks. Combined risk score: 4.8/100. Based on airport operations, weather, and cached board history at SAN and SEA.
The verdict above is that record speaking, so it reflects how WN4310 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as SAN and SEA published them.
Planning around WN4310? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — WN4310 San Diego to Seattle on-time performance, measured from the SAN and SEA airport boards.
https://proflightsearch.com/flight/WN4310
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