Skip to content

United Airlines

Is UA4577 delayed?

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

Arrived

10 min early

Updated

Departure

Dulles

IAD

Actual

Scheduled 08:33

Aug 29

Arrival

Roanoke

ROA

Actual

Scheduled 13:47

Aug 29

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.

  • MDT → ORD

    9 min late

  • MDT → ORD

    129 min late

  • MDT → ORD

    220 min late

  • MDT → ORD

    33 min late

  • MDT → ORD

    10 min early
Flight history and details

Aug 18, 2026 — Sep 17, 2026

Observed arrivals
12
Arrivals over 15 minutes late
3
Observed cancellations
0
Observed occurrences
20

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

UA4577 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 16, 2026ArrivedHarrisburgChicago
View this flight’s market
9
Sep 15, 2026ArrivedHarrisburgChicago
129
Sep 14, 2026ArrivedHarrisburgChicago
220
Sep 13, 2026ArrivedHarrisburgChicago
33
Sep 12, 2026ArrivedHarrisburgChicago
-10
Sep 11, 2026ArrivedHarrisburgChicago
-17
Sep 10, 2026ArrivedHarrisburgChicago
-33
Sep 9, 2026ArrivedHarrisburgChicago
-22
Sep 8, 2026ArrivedHarrisburgChicago
-47
Sep 7, 2026ArrivedDullesRoanoke
-7
Sep 4, 2026ArrivedDullesRoanoke
-12
Aug 29, 2026ArrivedDullesRoanoke
-10

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