UA2129United Airlines · SAN → IAD
live · 23m ago
Route confirmed United Airlines

UA2129 San DiegoSAN · 21:45 WashingtonIAD · 05:27

UA2129 by United Airlines flies from San Diego (SAN) to Washington (IAD) for the Fri, Nov 6 departure.

Right nowOn Time · gate 45 · as of 07:27
21:45

departs SAN · on schedule

Typical gate push+0 minmedian posted departure
Typical arrival−8 minmedian over 9 operations
Wins back in air~8 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
11-08
−8 arrival
11-07
+8 gate · −8 arrival
11-06
−22 arrival
11-05
+12 arrival
11-04
+0 gate · −26 arrival
11-03
+0 gate · −28 arrival
11-02
+0 gate · −7 arrival

The 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 operation

median arrival −8 min · 0 cancelled · 9 operations tracked

The route today

live boards
SANSan DiegoOn-time likelySAN delay board →
IADWashingtonOn-time likelyIAD delay board →
SAN→IADevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
50%Chance of 15+ min delay
2.8%Chance of cancellation
+16 minTypical airport delay in this weather

Conditions at SAN and IAD 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 San Diego

Forecast

Mon 9 Nov, local date

High27°Clikely 25°C to 29°C
Low17°Clikely 16°C to 18°C

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 Washington

Forecast

Mon 9 Nov, local date

High17°Clikely 14°C to 19°C
Low7°Clikely 5°C to 10°C

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 departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other San Diego to Washington flights today

same route · United Airlines
UA1071departs 08:00
UA444departs 13:10
UA1779departs 15:09

If 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 that show a delay still operate. Rebooking usually helps only when that delay is very large. 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 9 confirmed landings · 7/9 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.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
11-08SAN 21:45IAD 05:27 05:19 (−8)
11-07SAN 21:45 21:53 (+8)IAD 05:27 05:19 (−8)
11-06SAN 21:45IAD 05:27 05:05 (−22)
11-05SAN 21:45IAD 05:27 05:39 (+12)
11-04SAN 21:45 (+0)IAD 05:27 05:01 (−26)
11-03SAN 21:45 (+0)IAD 05:27 04:59 (−28)
11-02SAN 21:45 (+0)IAD 05:27 05:20 (−7)
11-01SAN IAD 05:27 05:53 (+26)
10-31SAN IAD 04:27 03:55 (−32)

Aircraft

Recent tails: N17423, N17421, N17477, N37542.

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

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: UA2129 San Diego to Washington on-time performance, measured from the SAN and IAD airport boards.

Canonical URL
https://proflightsearch.com/flight/UA2129
How we measure this →