UA2129 San DiegoSAN · 21:45 WashingtonIAD · 05:41
UA2129 by United Airlines flies from San Diego (SAN) to Washington (IAD) for the Tue, Sep 22 departure.
departs SAN · on schedule
board checked 52m ago · checking again in 45s
Where the minutes go
last 6 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 −4 min · 0 cancelled · 6 operations tracked
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by SAN (San Diego), 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 San Diego to Washington flights today
same route · United AirlinesIf UA2129 is cancelled, these are the other United Airlines nonstop flights from San Diego to Washington on the same day, with scheduled departure times in SAN local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA2129 actually runs
Pro Flight Search has tracked every published board update for UA2129 across the SAN and IAD boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 6 confirmed landings · 6/6 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA2129 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: N17429, N37534, N47512, N47275.
Board clocks recorded as SAN and IAD published them.
Planning around UA2129? 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 — UA2129 San Diego to Washington on-time performance, measured from the SAN and IAD airport boards.
https://proflightsearch.com/flight/UA2129
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