UA3377 St LouisSTL · 19:47 WashingtonIAD
UA3377 by United Airlines flies from St Louis (STL) to Washington (IAD).
scheduled from STL
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at STL and IAD 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 St Louis to Washington flights today
same route · United AirlinesIf UA3377 is cancelled, these are the other United Airlines nonstop flights from St Louis to Washington on the same day, with scheduled departure times in STL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA3377 actually runs
Pro Flight Search has tracked every published board update for UA3377 across the STL and IAD boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: departed +89 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA3377 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: N504GJ.
Board clocks recorded as STL and IAD published them.
Planning around UA3377? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA3377 St Louis to Washington on-time performance, measured from the STL and IAD airport boards.
https://proflightsearch.com/flight/UA3377
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