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United Airlines

Is UA2123 delayed?

Service date: · Scheduled departure date (America/Denver)

Arrived

On time

Official source · Updated

Departure

Denver

DEN

Actual

Scheduled 21:09

Aug 29

Arrival

San Francisco

SFO

Actual

Aug 29

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: Denver → San FranciscoDENSFO
Route overview

Recent arrivals

Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.

  • DEN → SFO

    2 min early

  • MCI → DEN

    23 min early

  • DEN → SFO

    1 min early

  • DEN → SFO

    1 min late

  • MCI → DEN

    19 min early
Flight history and details

Aug 17, 2026 — Sep 16, 2026

Observed arrivals
33
Arrivals over 15 minutes late
3
Observed cancellations
0
Observed occurrences
36

Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.

How flight status works

UA2123 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 15, 2026ArrivedDenverSan Francisco
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-2
Sep 15, 2026ArrivedKansas CityDenver
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-23
Sep 14, 2026ArrivedDenverSan Francisco
-1
Sep 13, 2026ArrivedDenverSan Francisco
1
Sep 13, 2026ArrivedKansas CityDenver
-19
Sep 12, 2026ArrivedDenverSan Francisco
-22
Sep 12, 2026ArrivedKansas CityDenver
1
Sep 11, 2026ArrivedDenverSan Francisco
-14
Sep 11, 2026ArrivedKansas CityDenver
-1
Sep 10, 2026ArrivedDenverSan Francisco
-10
Sep 10, 2026ArrivedKansas CityDenver
-15
Sep 9, 2026ArrivedDenverSan Francisco
-17
Sep 9, 2026ArrivedKansas CityDenver
-24
Sep 8, 2026ArrivedDenverSan Francisco
7
Sep 8, 2026ArrivedKansas CityDenver
4
Sep 7, 2026ArrivedDenverSan Francisco
-9
Sep 7, 2026ArrivedKansas CityDenver
24
Sep 6, 2026ArrivedDenverSan Francisco
3
Sep 6, 2026ArrivedKansas CityDenver
-17
Sep 5, 2026ArrivedDenverSan Francisco
-18
Sep 5, 2026ArrivedKansas CityDenver
0
Sep 4, 2026ArrivedDenverSan Francisco
-11
Sep 4, 2026ArrivedKansas CityDenver
7
Sep 3, 2026ArrivedDenverSan Francisco
44
Sep 2, 2026ArrivedDenverSan Francisco
-7
Sep 1, 2026ArrivedDenverSan Francisco
-20
Aug 31, 2026ArrivedDenverSan Francisco
9
Aug 30, 2026ArrivedDenverSan Francisco
-2
Aug 29, 2026ArrivedDenverSan Francisco
0
Aug 28, 2026ArrivedDenverSan Francisco
6
Aug 27, 2026ArrivedDenverSan Francisco
-14
Aug 26, 2026ArrivedDenverSan Francisco
25
Aug 17, 2026ArrivedDenverSan Francisco
-16

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