Skip to content

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

1 min late

Updated

Departure

Dulles

IAD

Actual

Scheduled 22:27

Aug 20

Arrival

Chicago

ORD

Actual

Scheduled 23:40

Aug 20

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Not available
Actual

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

Estimated departureLast reported

On time

This update may be out of date. Check with your airline.

Update time unavailable

Departure

Denver

DEN

Estimated

Aug 20

Arrival

Dulles

IAD

Estimated

Scheduled 21:08

Aug 20

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Actual
Not available
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
50
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
View this flight’s market
0
Sep 15, 2026ArrivedDenverDulles
-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

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