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United Airlines

Is UA503 delayed?

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

Arrived

27 min late

Official source · Updated

Departure

Boston

BOS

Scheduled

Sep 9

Arrival

Chicago

ORD

Actual

Scheduled 12:11

Sep 9

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: Boston → ChicagoBOSORD
Route overview

Recent arrivals

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

  • BOS → ORD

    10 min late

  • BOS → ORD

    119 min late

  • BOS → ORD

    16 min early

  • BOS → ORD

    90 min late

  • BOS → ORD

    29 min early
Flight history and details

Aug 20, 2026 — Sep 19, 2026

Observed arrivals
27
Arrivals over 15 minutes late
6
Observed cancellations
0
Observed occurrences
30

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

UA503 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 18, 2026ArrivedBostonChicago
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10
Sep 17, 2026ArrivedBostonChicago
119
Sep 16, 2026ArrivedBostonChicago
-16
Sep 15, 2026ArrivedBostonChicago
90
Sep 14, 2026ArrivedBostonChicago
-29
Sep 13, 2026ArrivedBostonChicago
-22
Sep 12, 2026ArrivedBostonChicago
-4
Sep 11, 2026ArrivedBostonChicago
-8
Sep 10, 2026ArrivedBostonChicago
4
Sep 9, 2026ArrivedBostonChicago
27
Sep 8, 2026ArrivedBostonChicago
-25
Sep 7, 2026ArrivedBostonChicago
-38
Sep 6, 2026ArrivedBostonChicago
-25
Sep 5, 2026ArrivedBostonChicago
-32
Sep 4, 2026ArrivedBostonChicago
37
Sep 3, 2026ArrivedBostonChicago
-9
Sep 2, 2026ArrivedBostonChicago
-24
Sep 1, 2026ArrivedBostonChicago
-24
Aug 31, 2026ArrivedBostonChicago
24
Aug 30, 2026ArrivedBostonChicago
55
Aug 29, 2026ArrivedBostonChicago
-38
Aug 28, 2026ArrivedBostonChicago
-37
Aug 27, 2026ArrivedBostonChicago
-29
Aug 26, 2026ArrivedBostonChicago
-38
Aug 25, 2026ArrivedBostonChicago
-43
Aug 24, 2026ArrivedBostonChicago
-31
Aug 23, 2026ArrivedBostonChicago
-42

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