Apparatus

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flight_takeoff Flight

UAL2123

Operated by UAL

Live map

Live map filtered to UAL2123. Shown when the flight is currently airborne.

Route airports View route page →

Departure

DEN KDEN VFR

Denver International Airport

Denver, US

Local time
23:05 MDT
Timezone
America/Denver
Type
Large Airport
Elevation
5,431 ft
Coordinates
39.8600, -104.6738

cloud Weather

Wind
260° / 15G22 kt
Visibility
10 SM
Ceiling
FEW 11,000 ft, SCT 15,000 ft, BKN 22,000 ft
Temp / Dew
9°C / -3°C
Altimeter
29.89 inHg

Obs: 2026-04-15T04:53:00.000Z

Raw METAR / TAF 
METAR KDEN 150453Z 26015G22KT 10SM FEW110 SCT150 BKN220 09/M03 A2989 RMK AO2 PK WND 31027/0435 WSHFT 0434 SLP081 T00891028

TAF KDEN 150454Z 1505/1606 25011G17KT P6SM BKN090 FM150600 21007KT P6SM FEW100 SCT200 FM151400 27007KT P6SM SCT200 FM152100 31008KT P6SM SCT200 FM160300 23007KT P6SM SCT200

flight Live Traffic

flight_takeoff 628 Departures
flight_land 561 Arrivals

Arrival

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
22:05 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
280° / 10 kt
Visibility
10 SM
Ceiling
FEW 2,800 ft
Temp / Dew
12°C / 7°C
Altimeter
30.15 inHg

Obs: 2026-04-15T04:56:00.000Z

Raw METAR / TAF 
METAR KSFO 150456Z 28010KT 10SM FEW028 12/07 A3015 RMK AO2 SLP209 T01170072 $

TAF KSFO 150307Z 1503/1606 28015KT P6SM SCT025 FM150800 27011KT P6SM SCT025 BKN150 FM151800 27018KT P6SM BKN150

flight Live Traffic

flight_takeoff 210 Departures
flight_land 218 Arrivals

Recent history last 6

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-04-14 A127BB AUS → SFO Apr 14, 05:15 UTCApr 14, 06:20 UTC1h 5m - -
2026-04-13 A5FCEF AUS → SFO Apr 13, 22:45 UTCApr 13, 23:45 UTC1h 0m - -
2026-04-13 AA739E AUS → SFO Apr 13, 04:20 UTCApr 13, 06:05 UTC1h 45m - -
2026-04-13 AA739E AUS → SFO Apr 13, 03:55 UTCApr 13, 06:05 UTC2h 10m - -
2026-04-13 AA739E AUS → SFO Apr 13, 03:40 UTCApr 13, 04:15 UTC35m - -
2026-04-12 A416BE AUS → SFO Apr 12, 23:55 UTCApr 13, 00:05 UTC10m - -

Performance history

Flights tracked
6
Avg arrival delay
-
On-time arrival
-
Aircraft used
4

Monthly activity 1 month

Month Flights tracked
April 2026 6

UAL2123 frequently asked

Where does flight UAL2123 fly?
UAL2123 (UAL) flies from DEN to SFO. View the full route page.
How long is flight UAL2123?
Based on observed flights, UAL2123 takes on average 1h 8m from takeoff to landing.
How often does UAL2123 fly?
UAL2123 has been observed flying occasionally in our tracking data. We've recorded 6 flights under this callsign.
What aircraft operates flight UAL2123?
UAL2123 has been operated by 4 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL2123 live?
Yes. When UAL2123 is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.