WN3957 OntarioONT · 20:00 OaklandOAK · 21:20
WN3957 by Southwest Airlines flies from Ontario (ONT) to Oakland (OAK) for the Mon, Sep 7 departure.
arrived at OAK · 5 min late
Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival +5 min · 0 cancelled · 7 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at ONT and OAK 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.
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 Ontario to Oakland flights today
same route · Southwest AirlinesIf WN3957 is cancelled, these are the other Southwest Airlines nonstop flights from Ontario to Oakland on the same day, with scheduled departure times in ONT local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN3957 actually runs
Pro Flight Search has tracked every published board update for WN3957 across the ONT and OAK boards: schedule changes, gate pushes and actual clocks. Usually lands ~8 min late. Based on 6 confirmed landings · 4/6 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how WN3957 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N8583Z, N8926Q, N8706W, N8871Q.
Board clocks recorded as ONT and OAK published them.
Planning around WN3957? 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 — WN3957 Ontario to Oakland on-time performance, measured from the ONT and OAK airport boards.
https://proflightsearch.com/flight/WN3957
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