WN1521 · SWA1521

SWA1521 over the last 30 days

As of 2026-10-26

SWA1521 is operated by Southwest Airlines on the route Ronald Reagan Washington National Airport (DCA/KDCA) → St. Louis Lambert International Airport (STL/KSTL). It usually takes off around 16:36 UTC (12:36 local time, DCA). It usually lands around 18:27 UTC (13:27 local time, STL). Most frequent aircraft type: BOEING 737-700 (B737).

Days with an observed flight (last 30 days)

23/30

Days of the week with an observed flight

Mon, Thu, Fri, Sat

Typical take-off

16:36 UTC · 12:36 local time (DCA)

Typical landing

18:27 UTC · 13:27 local time (STL)

Typical time airborne

105 min

Median departure deviation from the usual time on this route

+5 min

Departures within 15 minutes of the usual time

69 %

Departures measured

87

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: 9
• BOEING 737-800 (B738) — Number of flights: 8
• BOEING 737 MAX 8 (B38M) — Number of flights: 6

Aircraft in the last 7 days

• N8715Q · BOEING 737 MAX 8 2026-10-26
• N229WN · BOEING 737-700 2026-10-25
• N7823A · BOEING 737-700 2026-10-24
• N9010T · BOEING 737 MAX 8 2026-10-23
• N8540V · BOEING 737-800 2026-10-22

Related flights on this route

• All flights KDCA – KSTL