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United Airlines

Is UA543 delayed?

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

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

Arrived

8 min late

Official source · Updated

Departure

Chicago

ORD

Actual

Scheduled 10:25

Sep 4

Arrival

San Francisco

SFO

Actual

Scheduled 13:05

Sep 4

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Actual

Service date: · Scheduled departure date (UTC)

Arrived

9 min early

Official source · Updated

Departure

Buffalo

BUF

Actual

Scheduled 11:55

Sep 4

Arrival

Chicago

ORD

Actual

Scheduled 07:55

Sep 4

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: Chicago → San FranciscoORDSFO
Route overview

Recent arrivals

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

  • ORD → SFO

    185 min late

  • BUF → ORD

    113 min late

  • ORD → SFO

    64 min late

  • BUF → ORD

    4 min early

  • ORD → SFO

    127 min late
Flight history and details

Aug 21, 2026 — Sep 20, 2026

Observed arrivals
43
Arrivals over 15 minutes late
12
Observed cancellations
0
Observed occurrences
45

Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.

How flight status works

UA543 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 19, 2026ArrivedChicagoSan Francisco
View this flight’s market
185
Sep 19, 2026ArrivedBuffaloChicago
View this flight’s market
113
Sep 18, 2026ArrivedChicagoSan Francisco
64
Sep 18, 2026ArrivedBuffaloChicago
-4
Sep 17, 2026ArrivedChicagoSan Francisco
127
Sep 17, 2026ArrivedBuffaloChicago
107
Sep 16, 2026ArrivedChicagoSan Francisco
8
Sep 16, 2026ArrivedBuffaloChicago
10
Sep 15, 2026ArrivedChicagoSan Francisco
34
Sep 15, 2026ArrivedBuffaloChicago
52
Sep 14, 2026ArrivedChicagoSan Francisco
-8
Sep 14, 2026ArrivedBuffaloChicago
-9
Sep 13, 2026ArrivedChicagoSan Francisco
-18
Sep 13, 2026ArrivedBuffaloChicago
3
Sep 12, 2026ArrivedChicagoSan Francisco
-11
Sep 12, 2026ArrivedBuffaloChicago
-19
Sep 11, 2026ArrivedChicagoSan Francisco
33
Sep 11, 2026ArrivedBuffaloChicago
-25
Sep 10, 2026ArrivedChicagoSan Francisco
-12
Sep 10, 2026ArrivedBuffaloChicago
-19
Sep 9, 2026ArrivedChicagoSan Francisco
-3
Sep 9, 2026ArrivedBuffaloChicago
-19
Sep 8, 2026ArrivedChicagoSan Francisco
-4
Sep 8, 2026ArrivedBuffaloChicago
-17
Sep 7, 2026ArrivedChicagoSan Francisco
-12
Sep 7, 2026ArrivedBuffaloChicago
-13
Sep 6, 2026ArrivedChicagoSan Francisco
-27
Sep 5, 2026ArrivedChicagoSan Francisco
188
Sep 5, 2026ArrivedBuffaloChicago
-4
Sep 4, 2026ArrivedChicagoSan Francisco
8
Sep 4, 2026ArrivedBuffaloChicago
-9
Sep 3, 2026ArrivedChicagoSan Francisco
40
Sep 2, 2026ArrivedChicagoSan Francisco
8
Sep 1, 2026ArrivedChicagoSan Francisco
42
Aug 30, 2026ArrivedChicagoSan Francisco
-7
Aug 29, 2026ArrivedChicagoSan Francisco
-4
Aug 28, 2026ArrivedChicagoSan Francisco
4
Aug 27, 2026ArrivedChicagoSan Francisco
-29
Aug 26, 2026ArrivedChicagoSan Francisco
-9
Aug 25, 2026ArrivedChicagoSan Francisco
-2
Aug 24, 2026ArrivedChicagoSan Francisco
-6
Aug 23, 2026ArrivedChicagoSan Francisco
20
Aug 22, 2026ArrivedChicagoSan Francisco
-21

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