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United Airlines

Is UA543 delayed?

UA543 is cancelled on Nov 14.

Usually on time: arrived within 15 min of schedule on 31 of the last 38 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This update may be out of date.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

Buffalo

BUF

Scheduled

Nov 14

Arrival

Chicago

ORD

Scheduled

Nov 14

Times shown in airport local time

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

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Not available
Actual
Not available

No live update yet

Showing the published schedule until live times come in.

Update time unavailable

Departure

Chicago

ORD

Scheduled

Nov 14

Arrival

San Francisco

SFO

Scheduled

Nov 14

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
Not available

No live update yet

Showing the published schedule until live times come in.

Update time unavailable

Departure

San Francisco

SFO

Scheduled

Nov 14

Arrival

Las Vegas

LAS

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 AC4163, AC5295, NH7401, NZ2110, NZ9321, EK6303, VA8089

Route overview: Chicago → San FranciscoORDSFO
Chicago → San Francisco
Route overview: San Francisco → Las VegasSFOLAS
San Francisco → Las Vegas

Recent arrivals

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

  • Buffalo → Chicago

    26 min early

  • San Francisco → Las Vegas

    On schedule (15 min behind)

  • Chicago → San Francisco

    44 min early

  • Buffalo → Chicago

    30 min early

  • San Francisco → Las Vegas

    On schedule (5 min behind)

Is UA543 usually late?

Period: Oct 15, 2026 – Nov 14, 2026

Arrivals tracked
38
On time
82%
of 38 arrivals
Late
18%
of 38 arrivals
Cancelled
4%
of 67 flights
Median arrival delay
12 min early
9 in 10 arrived within
35 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

Chicago (ORD) departures

Left more than 15 min late
68 of 164
Cancelled today
135

Related flights

All United Airlines flights

Flight history and details
UA543 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Nov 14, 2026CancelledBuffaloChicagoNot availableNot available
Nov 13, 2026CancelledSan FranciscoLas VegasNot availableNot available
Nov 13, 2026CancelledChicagoSan FranciscoNot availableNot available
Nov 13, 2026ArrivedBuffaloChicago-26
Nov 12, 2026ArrivedSan FranciscoLas Vegas15
Nov 12, 2026ArrivedChicagoSan Francisco-44
Nov 12, 2026ArrivedBuffaloChicago-30
Nov 11, 2026ArrivedSan FranciscoLas Vegas5
Nov 11, 2026ArrivedChicagoSan Francisco-12
Nov 11, 2026ArrivedBuffaloChicago-21
Nov 10, 2026ArrivedSan FranciscoLas Vegas2
Nov 10, 2026ArrivedChicagoSan Francisco-33
Nov 10, 2026ArrivedBuffaloChicago-14
Nov 9, 2026ArrivedSan FranciscoLas Vegas8
Nov 9, 2026ArrivedChicagoSan Francisco35
Nov 9, 2026ArrivedBuffaloChicago-27
Nov 8, 2026ArrivedSan FranciscoLas Vegas-13
Nov 8, 2026ArrivedChicagoSan Francisco-40
Nov 8, 2026ArrivedBuffaloChicago173
Nov 7, 2026ArrivedSan FranciscoLas Vegas-9
Nov 7, 2026ArrivedChicagoSan Francisco-37
Nov 7, 2026ArrivedBuffaloChicago-21
Nov 6, 2026ArrivedSan FranciscoLas Vegas-8
Nov 6, 2026ArrivedChicagoSan Francisco-40
Nov 6, 2026ArrivedBuffaloChicago-19
Nov 5, 2026ArrivedSan FranciscoLas Vegas-14
Nov 5, 2026ArrivedChicagoSan Francisco-13
Nov 5, 2026ArrivedBuffaloChicago-23
Nov 4, 2026ArrivedSan FranciscoLas Vegas-27
Nov 4, 2026ArrivedChicagoSan Francisco-32
Nov 4, 2026ArrivedBuffaloChicago-32
Nov 3, 2026ArrivedSan FranciscoLas Vegas26
Nov 3, 2026ArrivedBuffaloChicagoNot available
Nov 2, 2026ArrivedSan FranciscoLas Vegas7
Nov 2, 2026ArrivedBuffaloChicagoNot available
Nov 1, 2026ArrivedSan FranciscoLas Vegas67
Oct 31, 2026ArrivedSan FranciscoLas Vegas-4
Oct 31, 2026ArrivedBuffaloChicagoNot available
Oct 30, 2026ArrivedSan FranciscoLas Vegas137
Oct 29, 2026ArrivedSan FranciscoLas Vegas36
Oct 29, 2026ArrivedBuffaloChicagoNot available
Oct 28, 2026ArrivedSan FranciscoLas Vegas-14
Oct 28, 2026ArrivedBuffaloChicagoNot available
Oct 27, 2026ArrivedSan FranciscoLas Vegas-10
Oct 27, 2026ArrivedBuffaloChicagoNot available
Oct 26, 2026ArrivedSan FranciscoLas Vegas15
Oct 26, 2026ArrivedBuffaloChicagoNot available
Oct 25, 2026ArrivedSan FranciscoLas Vegas-11
Oct 25, 2026ArrivedBuffaloChicagoNot available
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