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Southwest Airlines

Is WN421 delayed?

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

Arrived

3 min late

Official source · Updated

Departure

Denver

DEN

Scheduled

Sep 11

Arrival

Sacramento

SMF

Actual

Scheduled 18:54

Sep 11

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Not available
Actual

Recent arrivals

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

  • LAS → PIT

    40 min early

  • ALB → MDW

    89 min late

  • DEN → JAX

    29 min late

  • DEN → SMF

    3 min late

  • LAS → PIT

    10 min early
Flight history and details

Aug 17, 2026 — Sep 16, 2026

Observed arrivals
20
Arrivals over 15 minutes late
3
Observed cancellations
0
Observed occurrences
25

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

WN421 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 15, 2026ArrivedLas VegasPittsburgh
-40
Sep 13, 2026ArrivedAlbanyChicago
89
Sep 12, 2026ArrivedDenverJacksonville
29
Sep 11, 2026ArrivedDenverSacramento
3
Sep 9, 2026ArrivedLas VegasPittsburgh
-10
Sep 8, 2026ArrivedLas VegasPittsburgh
30
Sep 7, 2026ArrivedDenverSacramento
-5
Sep 5, 2026ArrivedDenverJacksonville
0
Sep 4, 2026ArrivedDenverSacramento
-16
Sep 2, 2026ArrivedLas VegasPittsburgh
-35
Sep 1, 2026ArrivedLas VegasPittsburgh
-22
Aug 31, 2026ArrivedDenverSacramento
-26
Aug 28, 2026ArrivedDenverSacramento
-5
Aug 27, 2026ArrivedDenverSacramento
-18
Aug 26, 2026ArrivedLas VegasPittsburgh
-15
Aug 25, 2026ArrivedLas VegasPittsburgh
-24
Aug 24, 2026ArrivedDenverSacramento
-17
Aug 21, 2026ArrivedDenverSacramento
-13
Aug 20, 2026ArrivedDenverSacramento
-20

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