Is UA4540 delayed?

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

Service date: Sep 21, 2026 · Scheduled departure date (America/Chicago)

Arrived

7 min early

Official source · Updated Sep 21, 2026, 17:07 UTC

Departure

Chicago

ORD

Scheduled

11:33

Sep 21

Arrival

Appleton

ATW

Actual

17:06~~17:13~~

Sep 21

Times shown in airport local time

Flight details

Departure · UTC

Scheduled: Sep 21, 2026, 16:33 UTC
Estimated: Not available
Actual: Not available

Arrival · UTC

Scheduled: Sep 21, 2026, 17:13 UTC
Estimated: Not available
Actual: Sep 21, 2026, 17:06 UTC

Service date: Sep 21, 2026 · Scheduled departure date (UTC)

Arrived

72 min late

Official source · Updated Sep 21, 2026, 13:05 UTC

Departure

Chattanooga

CHA

Actual

11:26~~10:16~~

Sep 21

Arrival

Chicago

ORD

Actual

07:57~~06:45~~

Sep 21

Times shown in airport local time

Flight details

Departure · UTC

Scheduled: Sep 21, 2026, 10:16 UTC
Estimated: Not available
Actual: Sep 21, 2026, 11:26 UTC

Arrival · UTC

Scheduled: Sep 21, 2026, 11:45 UTC
Estimated: Sep 21, 2026, 12:54 UTC
Actual: Sep 21, 2026, 12:57 UTC

ORDATW

CHAORD

Recent arrivals

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

Tue, Sep 22, 2026
CHA → ORD
27 min early
Mon, Sep 21, 2026
ORD → ATW
7 min early
Mon, Sep 21, 2026
CHA → ORD
72 min late
Sun, Sep 20, 2026
ORD → ATW
278 min late
Sun, Sep 20, 2026
CHA → ORD
84 min late

Flight history and details

Aug 23, 2026 — Sep 22, 2026

Observed arrivals: 24
Arrivals over 15 minutes late: 7
Observed cancellations: 2
Observed occurrences: 26

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

UA4540 Recent arrival history
Service date	Departure	Arrival	Actual	Arrival delay (minutes)
Sep 22, 2026Arrived	Chattanooga	Chicago	Sep 22, 2026, 11:37 UTC View this flight’s market	-27
Sep 21, 2026Arrived	Chicago	Appleton	Sep 21, 2026, 17:06 UTC	-7
Sep 21, 2026Arrived	Chattanooga	Chicago	Sep 21, 2026, 12:57 UTC	72
Sep 20, 2026Arrived	Chicago	Appleton	Sep 20, 2026, 21:16 UTC	278
Sep 20, 2026Arrived	Chattanooga	Chicago	Sep 20, 2026, 13:09 UTC	84
Sep 19, 2026Cancelled	Chattanooga	Chicago	Not available	Not available
Sep 18, 2026Arrived	Chicago	Appleton	Sep 18, 2026, 18:15 UTC	97
Sep 18, 2026Arrived	Chattanooga	Chicago	Sep 18, 2026, 11:47 UTC	-17
Sep 17, 2026Cancelled	Chicago	Appleton	Not available	Not available
Sep 17, 2026Arrived	Chattanooga	Chicago	Sep 17, 2026, 16:44 UTC	299
Sep 16, 2026Arrived	Chattanooga	Chicago	Sep 16, 2026, 11:44 UTC	-1
Sep 15, 2026Arrived	Chattanooga	Chicago	Sep 15, 2026, 11:28 UTC	-17
Sep 14, 2026Arrived	Chattanooga	Chicago	Sep 14, 2026, 11:50 UTC	5
Sep 13, 2026Arrived	Chicago	Appleton	Sep 13, 2026, 16:11 UTC	-27
Sep 13, 2026Arrived	Chattanooga	Chicago	Sep 13, 2026, 11:33 UTC	-12
Sep 12, 2026Arrived	Chattanooga	Chicago	Sep 12, 2026, 12:01 UTC	16
Sep 11, 2026Arrived	Chattanooga	Chicago	Sep 11, 2026, 11:42 UTC	-22
Sep 10, 2026Arrived	Chicago	Appleton	Sep 10, 2026, 18:34 UTC	116
Sep 10, 2026Arrived	Chattanooga	Chicago	Sep 10, 2026, 11:47 UTC	6
Sep 9, 2026Arrived	Chattanooga	Chicago	Sep 9, 2026, 11:30 UTC	-15
Sep 8, 2026Arrived	Chicago	Appleton	Sep 8, 2026, 16:08 UTC	-30
Sep 8, 2026Arrived	Chattanooga	Chicago	Sep 8, 2026, 11:36 UTC	-9
Sep 7, 2026Arrived	Chattanooga	Chicago	Sep 7, 2026, 11:52 UTC	-9
Sep 6, 2026Arrived	Chattanooga	Chicago	Sep 6, 2026, 11:49 UTC	-12
Sep 5, 2026Arrived	Chattanooga	Chicago	Sep 5, 2026, 12:01 UTC	0
Sep 4, 2026Arrived	Chattanooga	Chicago	Sep 4, 2026, 12:13 UTC	-7