UA2123United Airlines · DEN → SFO
live · 27m ago
Route confirmed United Airlines

UA2123 DenverDEN · 21:18 San FranciscoSFO · 23:09

UA2123 by United Airlines flies from Denver (DEN) to San Francisco (SFO) for the Mon, Nov 9 departure.

Right nowOn time · gate A28 · as of 07:08
21:18

departs DEN · on schedule

Typical gate push−3 minmedian posted departure
Typical arrival−19 minmedian over 4 operations
Wins back in air~16 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 4 operations · gate push → arrival
0+30+60+90 min
11-09
−19 arrival
11-08
−3 gate · −19 arrival
11-07
−6 gate · −20 arrival
11-06
−3 gate · −30 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The route today

live boards
DENDenverOn-time likelyDEN delay board →
SFOSan FranciscoHigh riskSFO delay board →
DEN→SFOevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
54%Chance of 15+ min delay
2.1%Chance of cancellation
+19 minTypical airport delay in this weather

Driven mainly by SFO (San Francisco), currently flying LIFR (low instrument). 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 Denver

Forecast

Tue 10 Nov, local date

High20°Clikely 17°C to 22°C
Low3°Clikely 2°C to 5°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 San Francisco

Forecast

Tue 10 Nov, local date

High22°Clikely 20°C to 23°C
Low13°Clikely 12°C to 15°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 Denver to San Francisco flights today

same route · United Airlines
UA2367departs 05:00
UA2265departs 06:00
UA969departs 06:50
UA2391departs 07:40
UA616departs 09:50
UA1561departs 11:20

If UA2123 is cancelled, these are the other United Airlines nonstop flights from Denver to San Francisco on the same day, with scheduled departure times in DEN 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 UA2123 actually runs

Pro Flight Search has tracked every published board update for UA2123 across the DEN and SFO boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 3 completed legs so far: left right on schedule but landed about 19 min early. Not enough to call it.

The verdict above is that record speaking, so it reflects how UA2123 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
11-09DEN 21:18SFO 23:09 22:50 (−19)
11-08DEN 21:18 21:15 (−3)SFO 23:09 22:50 (−19)
11-07DEN 21:18 21:12 (−6)SFO 23:09 22:49 (−20)
11-06DEN 21:18 21:15 (−3)SFO 23:09 22:39 (−30)

Aircraft

Recent tails: N14242, N57466, N37527.

Board clocks recorded as DEN and SFO published them.

Planning around UA2123? 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: UA2123 Denver to San Francisco on-time performance, measured from the DEN and SFO airport boards.

Canonical URL
https://proflightsearch.com/flight/UA2123
How we measure this →