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United Airlines

Is UA577 delayed?

Each route and date is shown separately. Confirm that both airports match your booking.

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

Arrived

17 min early

Official source · Updated

Departure

Newark

EWR

Scheduled

Sep 14

Arrival

Boston

BOS

Actual

Scheduled 14:17

Sep 14

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Not available
Actual

Service date: · Scheduled departure date (UTC)

Arrived

14 min early

Official source · Updated

Departure

St Louis

STL

Actual

Scheduled 12:15

Sep 14

Arrival

Newark

EWR

Actual

Scheduled 10:23

Sep 14

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: Newark → BostonEWRBOS
Route overview

Recent arrivals

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

  • EWR → BOS

    7 min late

  • STL → EWR

    5 min early

  • EWR → BOS

    20 min early

  • STL → EWR

    68 min late

  • EWR → BOS

    17 min early
Flight history and details

Aug 18, 2026 — Sep 17, 2026

Observed arrivals
33
Arrivals over 15 minutes late
6
Observed cancellations
0
Observed occurrences
39

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

UA577 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 16, 2026ArrivedNewarkBoston
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7
Sep 16, 2026ArrivedSt LouisNewark
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-5
Sep 15, 2026ArrivedNewarkBoston
-20
Sep 15, 2026ArrivedSt LouisNewark
68
Sep 14, 2026ArrivedNewarkBoston
-17
Sep 14, 2026ArrivedSt LouisNewark
-14
Sep 13, 2026ArrivedSt LouisNewark
-9
Sep 12, 2026ArrivedNewarkBoston
48
Sep 12, 2026ArrivedSt LouisNewark
-8
Sep 11, 2026ArrivedNewarkBoston
7
Sep 11, 2026ArrivedSt LouisNewark
-8
Sep 10, 2026ArrivedNewarkBoston
13
Sep 10, 2026ArrivedSt LouisNewark
-17
Sep 9, 2026ArrivedNewarkBoston
-14
Sep 9, 2026ArrivedSt LouisNewark
-5
Sep 8, 2026ArrivedNewarkBoston
-6
Sep 8, 2026ArrivedSt LouisNewark
-8
Sep 7, 2026ArrivedNewarkBoston
-11
Sep 7, 2026ArrivedSt LouisNewark
-2
Sep 6, 2026ArrivedNewarkBoston
-21
Sep 6, 2026ArrivedSt LouisNewark
-12
Sep 5, 2026ArrivedSt LouisNewark
-15
Sep 4, 2026ArrivedNewarkBoston
-8
Sep 4, 2026ArrivedSt LouisNewark
-2
Sep 3, 2026ArrivedNewarkBoston
39
Sep 1, 2026ArrivedNewarkBoston
-7
Aug 31, 2026ArrivedNewarkBoston
-17
Aug 30, 2026ArrivedNewarkBoston
-11
Aug 28, 2026ArrivedNewarkBoston
-31
Aug 27, 2026ArrivedNewarkBoston
68
Aug 26, 2026ArrivedNewarkBoston
-33
Aug 24, 2026ArrivedNewarkBoston
129
Aug 23, 2026ArrivedNewarkBoston
86

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