United Airlines
Is UA2123 delayed?
No delay reported yet. UA2123 is scheduled to leave Denver at 21:35 on Nov 14 and reach San Francisco at 23:07 (as of Nov 14, 15:47 UTC).
Usually on time: arrived within 15 min of schedule on 15 of the last 16 flights.
No live update yet
Showing the published schedule until live times come in.
Update time unavailable
Departure
Denver
DEN
Scheduled
Nov 14
Arrival
San Francisco
SFO
Scheduled
Nov 14
Times shown in airport local time
Service date: · Scheduled departure date (America/Denver)
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Also sold as AC3451, NZ9072, AV2353, VA8356
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 174 min late
Denver → San Francisco
- 35 min early
Denver → San Francisco
- 6 min early
Denver → San Francisco
- 22 min early
Denver → San Francisco
- 20 min early
Denver → San Francisco
Is UA2123 usually late?
Period: Oct 15, 2026 – Nov 14, 2026
On time means arriving no more than 15 minutes after the scheduled time; late means more than 15 minutes after. Cancelled and diverted flights are counted apart from arrivals. Compares scheduled and actual arrival times. Cancelled and diverted flights are left out. Some flights may be missing.
At the airports today
Denver (DEN) departures
- Left more than 15 min late
- 29 of 65
- Cancelled today
- 48
San Francisco (SFO) departures
- Left more than 15 min late
- 25 of 46
- Cancelled today
- 41
Related flights
Flight history and details
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Nov 13, 2026Arrived | Denver | San Francisco | 174 | |
| Nov 12, 2026Arrived | Denver | San Francisco | -35 | |
| Nov 11, 2026Arrived | Denver | San Francisco | -6 | |
| Nov 10, 2026Arrived | Denver | San Francisco | -22 | |
| Nov 9, 2026Arrived | Denver | San Francisco | -20 | |
| Nov 8, 2026Arrived | Denver | San Francisco | -32 | |
| Nov 7, 2026Arrived | Denver | San Francisco | -26 | |
| Nov 6, 2026Arrived | Denver | San Francisco | -36 | |
| Nov 5, 2026Arrived | Denver | San Francisco | -27 | |
| Nov 4, 2026Arrived | Denver | San Francisco | -27 | |
| Nov 3, 2026Arrived | Denver | San Francisco | Not available | |
| Oct 30, 2026Arrived | Nashville | Denver | -30 | |
| Oct 29, 2026Arrived | Nashville | Denver | -7 | |
| Oct 28, 2026Arrived | Nashville | Denver | -14 | |
| Oct 27, 2026Arrived | Nashville | Denver | -13 | |
| Oct 26, 2026Arrived | Nashville | Denver | -21 | |
| Oct 25, 2026Arrived | Nashville | Denver | -2 |