WN4120 · SWA4120

SWA4120 over the last 30 days

As of 2026-10-27

SWA4120 is operated by Southwest Airlines on the route Denver International Airport (DEN/KDEN) → Baltimore/Washington International Thurgood Marshall Airport (BWI/KBWI). It usually takes off around 06:44 UTC (00:44 local time, DEN). It usually lands around 09:41 UTC (05:41 local time, BWI). Most frequent aircraft type: BOEING 737-700 (B737).

Days with an observed flight (last 30 days)

20/30

Days of the week with an observed flight

Mon, Tue, Fri, Sat

Typical take-off

06:44 UTC · 00:44 local time (DEN)

Typical landing

09:41 UTC · 05:41 local time (BWI)

Typical time airborne

171 min

Median departure deviation from the usual time on this route

+5 min

Departures within 15 minutes of the usual time

66 %

Departures measured

120

Our measurement against the usual departure time of the route, from our own observations over the last 28 days; the figures cover all flights of this airline on the route.

Aircraft types on this flight (last 30 days)

• BOEING 737-700 (B737) — Number of flights: 13
• BOEING 737-800 (B738) — Number of flights: 5
• BOEING 737 MAX 8 (B38M) — Number of flights: 2

Aircraft in the last 7 days

• N941WN · BOEING 737-700 2026-10-27
• N7887A · BOEING 737-700 2026-10-26
• N8327A · BOEING 737-800 2026-10-25
• N455WN · BOEING 737-700 2026-10-24
• N499WN · BOEING 737-700 2026-10-23

Related flights on this route

• All flights KDEN – KBWI