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United Airlines

Is UA4540 delayed?

Service date: · Scheduled departure date (UTC)

Last reported

Cancelled

This update may be out of date. Check with your airline.

Update time unavailable

Departure

Chattanooga

CHA

Scheduled

Sep 19

Arrival

Chicago

ORD

Estimated

Scheduled 06:45

Sep 19

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Actual
Not available
View this flight’s market

Market prices express trading expectations about a contract’s stated threshold. They do not confirm airline status. The linked market shows its terms and activity.

Recent arrivals

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

  • ORD → ATW

    97 min late

  • CHA → ORD

    17 min early

  • CHA → ORD

    299 min late

  • CHA → ORD

    1 min early

  • CHA → ORD

    17 min early
Flight history and details

Aug 20, 2026 — Sep 19, 2026

Observed arrivals
19
Arrivals over 15 minutes late
4
Observed cancellations
2
Observed occurrences
21

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 19, 2026CancelledChattanoogaChicagoNot available
View this flight’s market
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

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