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United Airlines

Is UA4540 delayed?

Service date: · Scheduled departure date (UTC)

Arrived

9 min early

Official source · Updated

Departure

Chattanooga

CHA

Actual

Scheduled 10:31

Sep 7

Arrival

Chicago

ORD

Actual

Scheduled 07:01

Sep 7

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Actual

Recent arrivals

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

  • CHA → ORD

    299 min late

  • CHA → ORD

    1 min early

  • CHA → ORD

    17 min early

  • CHA → ORD

    5 min late

  • ORD → ATW

    27 min early
Flight history and details

Aug 19, 2026 — Sep 18, 2026

Observed arrivals
17
Arrivals over 15 minutes late
3
Observed cancellations
1
Observed occurrences
18

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 dateDepartureArrivalActualArrival delay (minutes)
Sep 17, 2026CancelledChicagoAppletonNot available
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Not available
Sep 17, 2026ArrivedChattanoogaChicago
View this flight’s market
299
Sep 16, 2026ArrivedChattanoogaChicago
-1
Sep 15, 2026ArrivedChattanoogaChicago
-17
Sep 14, 2026ArrivedChattanoogaChicago
5
Sep 13, 2026ArrivedChicagoAppleton
-27
Sep 13, 2026ArrivedChattanoogaChicago
-12
Sep 12, 2026ArrivedChattanoogaChicago
16
Sep 11, 2026ArrivedChattanoogaChicago
-22
Sep 10, 2026ArrivedChicagoAppleton
116
Sep 10, 2026ArrivedChattanoogaChicago
6
Sep 9, 2026ArrivedChattanoogaChicago
-15
Sep 8, 2026ArrivedChicagoAppleton
-30
Sep 8, 2026ArrivedChattanoogaChicago
-9
Sep 7, 2026ArrivedChattanoogaChicago
-9
Sep 6, 2026ArrivedChattanoogaChicago
-12
Sep 5, 2026ArrivedChattanoogaChicago
0
Sep 4, 2026ArrivedChattanoogaChicago
-7

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