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United Airlines

Is UA540 delayed?

UA540 is cancelled on Nov 13.

Usually on time: arrived within 15 min of schedule on 36 of the last 48 flights.

Each route and date is shown separately. Confirm that both airports match your booking.

Last reported

Cancelled

This update may be out of date.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

Update time unavailable

Departure

Denver

DEN

Scheduled

Nov 13

Arrival

San Diego

SAN

Scheduled

Nov 13

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
Last reported

Cancelled

This update may be out of date.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

Update time unavailable

Departure

San Diego

SAN

Scheduled

Nov 13

Arrival

Chicago

ORD

Scheduled

Nov 14

Times shown in airport local time

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

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Not available
Actual
Not available

Also sold as AC4266

Route overview: Denver → San DiegoDENSAN
Denver → San Diego
Route overview: San Diego → ChicagoSANORD
San Diego → Chicago

Recent arrivals

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

  • San Diego → Chicago

    20 min early

  • Denver → San Diego

    11 min early

  • San Diego → Chicago

    11 min early

  • Denver → San Diego

    22 min early

  • San Diego → Chicago

    39 min early

Is UA540 usually late?

Period: Oct 15, 2026 – Nov 14, 2026

Arrivals tracked
48
On time
75%
of 48 arrivals
Late
25%
of 48 arrivals
Cancelled
3%
of 59 flights
Median arrival delay
5 min early
9 in 10 arrived within
31 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
27 of 62
Cancelled today
47
Flights from Denver to San Diego today

San Diego (SAN) departures

Left more than 15 min late
4 of 19
Cancelled today
17

Related flights

All United Airlines flights

Flight history and details
UA540 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Nov 13, 2026CancelledSan DiegoChicagoNot availableNot available
Nov 13, 2026CancelledDenverSan DiegoNot availableNot available
Nov 12, 2026ArrivedSan DiegoChicago-20
Nov 12, 2026ArrivedDenverSan Diego-11
Nov 11, 2026ArrivedSan DiegoChicago-11
Nov 11, 2026ArrivedDenverSan Diego-22
Nov 10, 2026ArrivedSan DiegoChicago-39
Nov 10, 2026ArrivedDenverSan Diego-23
Nov 9, 2026ArrivedSan DiegoChicago-7
Nov 9, 2026ArrivedDenverSan Diego19
Nov 8, 2026ArrivedSan DiegoChicago0
Nov 8, 2026ArrivedDenverSan Diego-14
Nov 7, 2026ArrivedSan DiegoChicago-17
Nov 7, 2026ArrivedDenverSan Diego-6
Nov 6, 2026ArrivedSan DiegoChicago-10
Nov 6, 2026ArrivedDenverSan Diego-34
Nov 5, 2026ArrivedSan DiegoChicago-24
Nov 5, 2026ArrivedDenverSan Diego28
Nov 4, 2026ArrivedSan DiegoChicago-10
Nov 4, 2026ArrivedDenverSan Diego-18
Nov 3, 2026ArrivedSan DiegoChicago-43
Nov 3, 2026ArrivedDenverSan Diego12
Nov 2, 2026ArrivedDenverSan Diego8
Nov 1, 2026ArrivedDenverSan Diego13
Oct 31, 2026ArrivedDenverSan Diego4
Oct 30, 2026ArrivedDenverSan Diego26
Oct 29, 2026ArrivedDenverSan Diego16
Oct 28, 2026ArrivedDenverSan Diego-4
Oct 27, 2026ArrivedDenverSan Diego1
Oct 26, 2026ArrivedDenverSan Diego23
Oct 25, 2026ArrivedDenverSan Diego5
Oct 24, 2026ArrivedDenverSan Diego6
Oct 24, 2026ArrivedSan FranciscoDenver5
Oct 23, 2026ArrivedDenverSan Diego-6
Oct 23, 2026ArrivedSan FranciscoDenver-6
Oct 22, 2026ArrivedDenverSan Diego8
Oct 22, 2026ArrivedSan FranciscoDenver-4
Oct 21, 2026ArrivedDenverSan Diego-6
Oct 21, 2026ArrivedSan FranciscoDenver-15
Oct 20, 2026ArrivedDenverSan Diego-12
Oct 19, 2026ArrivedDenverSan Diego-27
Oct 19, 2026ArrivedSan FranciscoDenver37
Oct 18, 2026ArrivedDenverSan Diego43
Oct 18, 2026ArrivedSan FranciscoDenver93
Oct 17, 2026ArrivedDenverSan Diego25
Oct 17, 2026ArrivedSan FranciscoDenver-9
Oct 16, 2026ArrivedDenverSan Diego217
Oct 16, 2026ArrivedSan FranciscoDenver20
Oct 15, 2026ArrivedDenverSan Diego-6
Oct 15, 2026ArrivedSan FranciscoDenver38
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