United Airlines
Is UA2421 delayed?
No, UA2421 landed in San Francisco 18 min early, at 08:55 on Nov 13 (as of Nov 13, 16:55 UTC).
18 min early
Official source · Updated
Departure
San Antonio
SAT
Scheduled
Nov 13
Arrival
San Francisco
SFO
Actual
Scheduled 09:14
Nov 13
Times shown in airport local time
Service date: · Scheduled departure date (America/Chicago)
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
Also sold as AC4201, NZ2372
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 18 min early
San Antonio → San Francisco
- 26 min early
San Antonio → San Francisco
- 28 min early
San Antonio → San Francisco
- 29 min early
San Antonio → San Francisco
- 4 min early
San Antonio → San Francisco
Is UA2421 usually late?
Period: Oct 15, 2026 – Nov 14, 2026
Not graded: 9, with no published arrival schedule to compare against. They are in no other figure.
Percentages and delay figures appear once 20 arrivals are graded.
On time means landing no more than 15 minutes after the scheduled arrival, late more than 15 minutes after, both times read to the minute. The percentages share one base: graded arrivals plus cancelled and diverted flights. A cancelled plan another plan of the flight replaced within 12 hours is not counted. Median and “9 in 10” are interpolated over the graded arrivals. Compares scheduled and actual arrival times, read to the minute. Some flights may be missing.
Departures on record at these airports today
San Francisco (SFO) departures
- Delayed: left more than 15 min after schedule
- 67 delayed, 53 cancelled of 199 departures on record
Counts cover the departures on record at each airport, not its full schedule.
Related flights
Flight history and details
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Nov 13, 2026Arrived | San Antonio | San Francisco | -18 | |
| Nov 12, 2026Arrived | San Antonio | San Francisco | -26 | |
| Nov 11, 2026Arrived | San Antonio | San Francisco | -28 | |
| Nov 10, 2026Arrived | San Antonio | San Francisco | -29 | |
| Nov 9, 2026Arrived | San Antonio | San Francisco | -4 | |
| Nov 8, 2026Arrived | San Antonio | San Francisco | 18 | |
| Nov 6, 2026Arrived | San Antonio | San Francisco | -22 | |
| Nov 5, 2026Arrived | San Antonio | San Francisco | -4 | |
| Nov 4, 2026Arrived | San Antonio | San Francisco | -5 | |
| Oct 28, 2026ArrivedNot graded: no published schedule | San Antonio | San Francisco | Not available |