WN420 · SWA420

Schedule for today and the next days

• → 2026-10-27 13:45 · Buffalo Niagara International Airport (BUF/KBUF) → Baltimore/Washington International Thurgood Marshall Airport (BWI/KBWI)

Scheduled times from airport boards, in local time. Actual departures and arrivals are measured by the map.flights network.

SWA420 over the last 30 days

As of 2026-10-26

SWA420 is operated by Southwest Airlines on the route Buffalo Niagara International Airport (BUF/KBUF) → Baltimore/Washington International Thurgood Marshall Airport (BWI/KBWI). It usually takes off around 16:46 or 22:19 UTC (12:46 or 18:19 local time, BUF). It usually lands around 17:32 or 23:14 UTC (13:32 or 19:14 local time, BWI). Most frequent aircraft type: BOEING 737 MAX 8 (B38M).

Days with an observed flight (last 30 days)

28/30

Days of the week with an observed flight

Mon, Tue, Wed, Thu, Fri

Typical take-off

16:46 UTC · 12:46 local time (BUF) / 22:19 UTC · 18:19 local time (BUF)

Typical landing

17:32 UTC · 13:32 local time (BWI) / 23:14 UTC · 19:14 local time (BWI)

Typical time airborne

48 min

Median departure deviation from the usual time on this route

+2 min

Departures within 15 minutes of the usual time

75 %

Departures measured

116

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 MAX 8 (B38M) — Number of flights: 29
• BOEING 737-800 (B738) — Number of flights: 11
• BOEING 737-700 (B737) — Number of flights: 9

Aircraft in the last 7 days

• N8831L · BOEING 737 MAX 8 2026-10-26
• N495WN · BOEING 737-700 2026-10-25
• N8509U · BOEING 737-800 2026-10-24
• N8833L · BOEING 737 MAX 8 2026-10-23
• N8577Z · BOEING 737-800 2026-10-22
• N8735L · BOEING 737 MAX 8 2026-10-21

Related flights on this route

• All flights KBUF – KBWI