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United Airlines

Is UA421 delayed?

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

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

Arrived

23 min late

Official source · Updated

Departure

Dulles

IAD

Actual

Scheduled 22:42

Sep 6

Arrival

Chicago

ORD

Actual

Scheduled 23:22

Sep 6

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Actual

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

Arrived

8 min early

Official source · Updated

Departure

Denver

DEN

Actual

Scheduled 15:59

Sep 6

Arrival

Dulles

IAD

Actual

Scheduled 21:03

Sep 6

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 → ChicagoIADORD
Route overview
Route overview: Denver → DullesDENIAD
Route overview

Recent arrivals

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

  • IAD → ORD

    On time

  • DEN → IAD

    26 min early

  • IAD → ORD

    9 min early

  • DEN → IAD

    23 min early

  • IAD → ORD

    6 min late
Flight history and details

Aug 17, 2026 — Sep 16, 2026

Observed arrivals
51
Arrivals over 15 minutes late
6
Observed cancellations
0
Observed occurrences
54

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

UA421 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 15, 2026ArrivedDullesChicago
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0
Sep 15, 2026ArrivedDenverDulles
View this flight’s market
-26
Sep 14, 2026ArrivedDullesChicago
-9
Sep 14, 2026ArrivedDenverDulles
-23
Sep 13, 2026ArrivedDullesChicago
6
Sep 13, 2026ArrivedDenverDulles
-4
Sep 12, 2026ArrivedDullesChicago
-2
Sep 12, 2026ArrivedDenverDulles
-18
Sep 11, 2026ArrivedDullesChicago
-34
Sep 11, 2026ArrivedDenverDulles
-10
Sep 10, 2026ArrivedDullesChicago
-6
Sep 10, 2026ArrivedDenverDulles
-24
Sep 9, 2026ArrivedDullesChicago
-6
Sep 9, 2026ArrivedDenverDulles
-15
Sep 8, 2026ArrivedDullesChicago
-2
Sep 8, 2026ArrivedDenverDulles
-17
Sep 7, 2026ArrivedDullesChicago
-10
Sep 7, 2026ArrivedDenverDulles
9
Sep 6, 2026ArrivedDullesChicago
23
Sep 6, 2026ArrivedDenverDulles
-8
Sep 5, 2026ArrivedDullesChicago
-21
Sep 5, 2026ArrivedDenverDulles
-23
Sep 4, 2026ArrivedDullesChicago
-1
Sep 4, 2026ArrivedDenverDulles
-14
Sep 3, 2026ArrivedDenverDulles
40
Sep 2, 2026ArrivedDullesChicago
-22
Sep 2, 2026ArrivedDenverDulles
-21
Sep 1, 2026ArrivedDullesChicago
17
Sep 1, 2026ArrivedDenverDulles
-10
Aug 31, 2026ArrivedDullesChicago
-4
Aug 31, 2026ArrivedDenverDulles
-2
Aug 30, 2026ArrivedDullesChicago
56
Aug 30, 2026ArrivedDenverDulles
-2
Aug 29, 2026ArrivedDullesChicago
-28
Aug 29, 2026ArrivedDenverDulles
-2
Aug 28, 2026ArrivedDullesChicago
-20
Aug 28, 2026ArrivedDenverDulles
12
Aug 27, 2026ArrivedDullesChicago
51
Aug 27, 2026ArrivedDenverDulles
5
Aug 26, 2026ArrivedDullesChicago
-16
Aug 26, 2026ArrivedDenverDulles
-23
Aug 25, 2026ArrivedDullesChicago
-36
Aug 25, 2026ArrivedDenverDulles
118
Aug 24, 2026ArrivedDullesChicago
-20
Aug 24, 2026ArrivedDenverDulles
-33
Aug 23, 2026ArrivedDullesChicago
-17
Aug 23, 2026ArrivedDenverDulles
-12
Aug 21, 2026ArrivedDullesChicago
-2
Aug 21, 2026ArrivedDenverDulles
0
Aug 20, 2026ArrivedDullesChicago
1
Aug 17, 2026ArrivedDenverDulles
-23

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