Skip to content

United Airlines

Is UA4540 delayed?

Service date: · Scheduled departure date (UTC)

Arrived

15 min early

Official source · Updated

Departure

Chattanooga

CHA

Actual

Scheduled 10:16

Sep 9

Arrival

Chicago

ORD

Actual

Scheduled 06:45

Sep 9

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.

  • ORD → ATW

    7 min early

  • CHA → ORD

    72 min late

  • ORD → ATW

    278 min late

  • CHA → ORD

    84 min late

  • ORD → ATW

    97 min late
Flight history and details

Aug 22, 2026 — Sep 21, 2026

Observed arrivals
23
Arrivals over 15 minutes late
7
Observed cancellations
2
Observed occurrences
25

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 21, 2026ArrivedChicagoAppleton
View this flight’s market
-7
Sep 21, 2026ArrivedChattanoogaChicago
View this flight’s market
72
Sep 20, 2026ArrivedChicagoAppleton
278
Sep 20, 2026ArrivedChattanoogaChicago
84
Sep 19, 2026CancelledChattanoogaChicagoNot available
Not available
Sep 18, 2026ArrivedChicagoAppleton
97
Sep 18, 2026ArrivedChattanoogaChicago
-17
Sep 17, 2026CancelledChicagoAppletonNot available
Not available
Sep 17, 2026ArrivedChattanoogaChicago
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

Essential cookies keep the site running; analytics are optional. Privacy policy