WN4840 ChicagoMDW PortlandPDX
WN4840 by Southwest Airlines flies from Chicago (MDW) to Portland (PDX).
scheduled from MDW
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by MDW (Chicago), currently flying MVFR (marginal visual). 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 Chicago to Portland flights today
same route · Southwest AirlinesIf WN4840 is cancelled, these are the other Southwest Airlines nonstop flights from Chicago to Portland on the same day, with scheduled departure times in MDW local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN4840 actually runs
Pro Flight Search has tracked every published board update for WN4840 across the MDW and PDX boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at MDW and PDX.
The verdict above is that record speaking, so it reflects how WN4840 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around WN4840? 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 — WN4840 Chicago to Portland on-time performance, measured from the MDW and PDX airport boards.
https://proflightsearch.com/flight/WN4840
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