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United Airlines

Is UA4559 delayed?

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

Arrived

57 min late

Official source · Updated

Departure

Dulles

IAD

Actual

Scheduled 17:48

Sep 10

Arrival

Detroit

DTW

Actual

Scheduled 18:48

Sep 10

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Not available
Actual
Route overview: Dulles → DetroitIADDTW
Route overview

Recent arrivals

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

  • IAD → DTW

    14 min early

  • IAD → DTW

    126 min late

  • IAD → DTW

    8 min late

  • IAD → DTW

    5 min late

  • IAD → DTW

    6 min early
Flight history and details

Aug 20, 2026 — Sep 19, 2026

Observed arrivals
14
Arrivals over 15 minutes late
6
Observed cancellations
0
Observed occurrences
15

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

UA4559 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 18, 2026ArrivedDullesDetroit
View this flight’s market
-14
Sep 17, 2026ArrivedDullesDetroit
126
Sep 16, 2026ArrivedDullesDetroit
8
Sep 15, 2026ArrivedDullesDetroit
5
Sep 14, 2026ArrivedDullesDetroit
-6
Sep 11, 2026ArrivedDullesDetroit
-7
Sep 10, 2026ArrivedDullesDetroit
57
Sep 9, 2026ArrivedDullesDetroit
29
Sep 8, 2026ArrivedDullesDetroit
40
Sep 7, 2026ArrivedAllentownChicago
-28
Sep 6, 2026ArrivedAllentownChicago
-1
Sep 5, 2026ArrivedAllentownChicago
-34
Sep 4, 2026ArrivedAllentownChicago
267
Sep 3, 2026ArrivedAllentownChicago
107

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