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United Airlines

Is UA1521 delayed?

UA1521 is cancelled on Nov 14.

Usually on time: arrived within 15 min of schedule on 22 of the last 26 flights.

Last reported

Cancelled

This update may be out of date. Check with your airline.

Update time unavailable

Departure

Denver

DEN

Scheduled

Nov 14

Arrival

San Antonio

SAT

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

Recent arrivals

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

  • Denver → San Antonio

    12 min early

  • Denver → San Antonio

    17 min early

  • Denver → San Antonio

    15 min early

  • Denver → San Antonio

    On schedule (10 min behind)

  • Denver → San Antonio

    On schedule (7 min behind)

Is UA1521 usually late?

Period: Oct 15, 2026 – Nov 14, 2026

Arrivals tracked
26
On time
85%
of 26 arrivals
Late
15%
of 26 arrivals
Cancelled
0%
of 29 flights
Median arrival delay
3 min early
9 in 10 arrived within
21 min

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.

How flight status works

At the airports today

Denver (DEN) departures

Left more than 15 min late
21 of 33
Cancelled today
42
Flights from Denver to San Antonio today

Related flights

All United Airlines flights

Flight history and details
UA1521 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Nov 12, 2026ArrivedDenverSan Antonio-12
Nov 11, 2026ArrivedDenverSan Antonio-17
Nov 10, 2026ArrivedDenverSan Antonio-15
Nov 9, 2026ArrivedDenverSan Antonio10
Nov 8, 2026ArrivedDenverSan Antonio7
Nov 7, 2026ArrivedDenverSan Antonio-16
Nov 6, 2026ArrivedDenverSan Antonio25
Nov 4, 2026ArrivedDenverSan Antonio-23
Nov 3, 2026ArrivedDenverSan Antonio-11
Nov 2, 2026ArrivedDenverSan Antonio-13
Nov 1, 2026ArrivedDenverSan Antonio-23
Oct 31, 2026ArrivedDenverSan Antonio-1
Oct 29, 2026ArrivedDenverSan Antonio-11
Oct 28, 2026ArrivedDenverSan Antonio-13
Oct 27, 2026ArrivedDenverSan Antonio-6
Oct 26, 2026ArrivedDenverSan Antonio2
Oct 25, 2026ArrivedDenverSan Antonio5
Oct 24, 2026ArrivedDes MoinesDenver6
Oct 23, 2026ArrivedDes MoinesDenver24
Oct 22, 2026ArrivedDes MoinesDenver15
Oct 21, 2026ArrivedDes MoinesDenver78
Oct 20, 2026ArrivedDes MoinesDenver-3
Oct 19, 2026ArrivedDes MoinesDenver-3
Oct 18, 2026ArrivedDes MoinesDenver18
Oct 17, 2026ArrivedDes MoinesDenver-30
Oct 16, 2026ArrivedDes MoinesDenver1
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