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United Airlines

Is UA721 delayed?

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

Arrived

42 min late

Updated

Departure

Boston

BOS

Actual

Scheduled 14:28

Aug 28

Arrival

Dulles

IAD

Actual

Scheduled 16:09

Aug 28

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: Boston → DullesBOSIAD
Route overview

Recent arrivals

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

  • BOS → IAD

    8 min early

  • BOS → IAD

    11 min late

  • BOS → IAD

    6 min early

  • BOS → IAD

    20 min late

  • BOS → IAD

    15 min late
Flight history and details

Aug 19, 2026 — Sep 18, 2026

Observed arrivals
29
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

UA721 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 17, 2026ArrivedBostonDulles
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-8
Sep 16, 2026ArrivedBostonDulles
11
Sep 15, 2026ArrivedBostonDulles
-6
Sep 14, 2026ArrivedBostonDulles
20
Sep 13, 2026ArrivedBostonDulles
15
Sep 12, 2026ArrivedBostonDulles
-6
Sep 11, 2026ArrivedBostonDulles
3
Sep 10, 2026ArrivedBostonDulles
-1
Sep 9, 2026ArrivedBostonDulles
2
Sep 8, 2026ArrivedBostonDulles
6
Sep 7, 2026ArrivedBostonDulles
-11
Sep 6, 2026ArrivedBostonDulles
-17
Sep 5, 2026ArrivedBostonDulles
-9
Sep 4, 2026ArrivedBostonDulles
-10
Sep 3, 2026ArrivedBostonDulles
-18
Sep 2, 2026ArrivedBostonDulles
218
Sep 1, 2026ArrivedBostonDulles
-18
Aug 31, 2026ArrivedBostonDulles
-11
Aug 30, 2026ArrivedBostonDulles
19
Aug 29, 2026ArrivedBostonDulles
12
Aug 28, 2026ArrivedBostonDulles
42
Aug 27, 2026ArrivedBostonDulles
-5
Aug 26, 2026ArrivedBostonDulles
-20
Aug 25, 2026ArrivedBostonDulles
-3
Aug 24, 2026ArrivedBostonDulles
-1
Aug 23, 2026ArrivedBostonDulles
25
Aug 22, 2026ArrivedBostonDulles
0
Aug 21, 2026ArrivedBostonDulles
-13
Aug 20, 2026ArrivedBostonDulles
-5

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