UA3397 WashingtonIAD · 14:46 St LouisSTL
UA3397 by United Airlines flies from Washington (IAD) to St Louis (STL).
scheduled from IAD
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at IAD and STL are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 →
Tomorrow at Washington
ForecastFri 6 Nov, local date
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
Tomorrow at St Louis
ForecastFri 6 Nov, local date
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Washington to St Louis flights today
same route · United AirlinesIf UA3397 is cancelled, these are the other United Airlines nonstop flights from Washington to St Louis on the same day, with scheduled departure times in IAD local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How UA3397 actually runs
Pro Flight Search has tracked every published board update for UA3397 across the IAD and STL boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 1 completed leg so far: departed +0 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA3397 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: N524GJ.
Board clocks recorded as IAD and STL published them.
Planning around UA3397? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search: UA3397 Washington to St Louis on-time performance, measured from the IAD and STL airport boards.
https://proflightsearch.com/flight/UA3397
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