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United Airlines

Is UA4556 delayed?

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

Arrived

12 min late

Official source · Updated

Departure

Detroit

DTW

Actual

Scheduled 20:03

Sep 8

Arrival

Dulles

IAD

Actual

Scheduled 21:17

Sep 8

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Not available
Actual
Route overview: Detroit → DullesDTWIAD
Route overview

Recent arrivals

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

  • DTW → IAD

    21 min early

  • DTW → IAD

    100 min late

  • DTW → IAD

    17 min early

  • DTW → IAD

    17 min early

  • DTW → IAD

    21 min early
Flight history and details

Aug 20, 2026 — Sep 19, 2026

Observed arrivals
14
Arrivals over 15 minutes late
3
Observed cancellations
0
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

UA4556 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 18, 2026ArrivedDetroitDulles
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-21
Sep 17, 2026ArrivedDetroitDulles
100
Sep 16, 2026ArrivedDetroitDulles
-17
Sep 15, 2026ArrivedDetroitDulles
-17
Sep 14, 2026ArrivedDetroitDulles
-21
Sep 13, 2026ArrivedDetroitDulles
14
Sep 11, 2026ArrivedDetroitDulles
-12
Sep 10, 2026ArrivedDetroitDulles
30
Sep 9, 2026ArrivedDetroitDulles
-3
Sep 8, 2026ArrivedDetroitDulles
12
Sep 7, 2026ArrivedDullesNorfolk
2
Sep 7, 2026ArrivedRichmondDulles
-15
Sep 6, 2026ArrivedRichmondDulles
-26
Sep 5, 2026ArrivedRichmondDulles
106

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