WN4155 Los AngelesLAX · 09:55 BaltimoreBWI · 17:50
WN4155 by Southwest Airlines flies from Los Angeles (LAX) to Baltimore (BWI) for the Fri, Sep 18 departure.
arrived at BWI · 3 min late
⚖ WN4155 typically leaves +30 and lands +6. The air wins minutes back.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 +6 min · 0 cancelled · 12 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at LAX and BWI 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 Los Angeles to Baltimore flights today
same route · Southwest AirlinesIf WN4155 is cancelled, these are the other Southwest Airlines nonstop flights from Los Angeles to Baltimore on the same day, with scheduled departure times in LAX local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN4155 actually runs
Pro Flight Search has tracked every published board update for WN4155 across the LAX and BWI boards: schedule changes, gate pushes and actual clocks. Usually lands ~8 min late. Based on 12 confirmed landings · 7/12 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 WN4155 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: N8650F, N8864H, N8957Q, N8556Z.
Board clocks recorded as LAX and BWI published them.
Planning around WN4155? 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 — WN4155 Los Angeles to Baltimore on-time performance, measured from the LAX and BWI airport boards.
https://proflightsearch.com/flight/WN4155
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