WN420 WashingtonDCA · 10:35 DenverDEN · 12:45
WN420 by Southwest Airlines flies from Washington (DCA) to Denver (DEN).
Same number through DCA → DAL → DEN
scheduled from DCA
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 operation0 cancelled · 10 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at DCA and DEN 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 Washington to Denver flights today
same route · Southwest AirlinesIf WN420 is cancelled, these are the other Southwest Airlines nonstop flights from Washington to Denver on the same day, with scheduled departure times in DCA local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN420 actually runs
Pro Flight Search has tracked every published board update for WN420 across the DCA and DEN boards: schedule changes, gate pushes and actual clocks. Usually lands ~7 min early. Based on 10 confirmed landings · 8/10 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 WN420 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: N8716B, N925WN, N940WN, N265WN.
Board clocks recorded as DCA and DEN published them.
Planning around WN420? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — WN420 Washington to Denver on-time performance, measured from the DCA and DEN airport boards.
https://proflightsearch.com/flight/WN420
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