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United Airlines

Is UA3551 delayed?

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

Arrived

30 min early

Updated

Departure

Chicago

ORD

Actual

Scheduled 21:25

Aug 24

Arrival

Louisville

SDF

Actual

Scheduled 03:59

Aug 25

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
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 → SDF

    3 min early

  • ORD → SDF

    5 min early

  • ORD → SDF

    110 min late

  • ORD → SDF

    11 min early

  • ORD → SDF

    19 min early
Flight history and details

Aug 19, 2026 — Sep 18, 2026

Observed arrivals
16
Arrivals over 15 minutes late
2
Observed cancellations
1
Observed occurrences
23

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

UA3551 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 17, 2026ArrivedChicagoLouisville
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-3
Sep 16, 2026ArrivedChicagoLouisville
-5
Sep 15, 2026ArrivedChicagoLouisville
110
Sep 14, 2026ArrivedChicagoLouisville
-11
Sep 13, 2026ArrivedChicagoLouisville
-19
Sep 12, 2026ArrivedChicagoLouisville
-3
Sep 11, 2026ArrivedChicagoLouisville
-3
Sep 9, 2026ArrivedChicagoLouisville
-3
Sep 8, 2026ArrivedChicagoLouisville
-18
Sep 7, 2026ArrivedChicagoLouisville
-21
Sep 6, 2026ArrivedChicagoLouisville
31
Sep 5, 2026ArrivedChicagoLouisville
-26
Sep 2, 2026ArrivedChicagoLouisville
-25
Aug 31, 2026CancelledChicagoLouisvilleNot available
Not available
Aug 29, 2026ArrivedChicagoLouisville
-36
Aug 24, 2026ArrivedChicagoLouisville
-30
Aug 23, 2026ArrivedChicagoLouisville
-16

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