Apparatus

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flight_takeoff Flight

SWA4121

Operated by Southwest Airlines

Live map

Live map filtered to SWA4121. Shown when the flight is currently airborne.

Route airports View route page →

Departure

LGA KLGA VFR

LaGuardia Airport

New York, US

Local time
06:37 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
21 ft
Coordinates
40.7772, -73.8726

cloud Weather

Wind
0° / 0 kt
Visibility
10 SM
Ceiling
FEW 4,300 ft, SCT 17,000 ft, BKN 25,000 ft
Temp / Dew
22°C / 20°C
Altimeter
29.95 inHg

Obs: 2026-08-28T09:51:00.000Z

Raw METAR / TAF 
METAR KLGA 280951Z 00000KT 10SM FEW043 SCT170 BKN250 22/20 A2995 RMK AO2 SLP143 T02220200 $

TAF KLGA 280832Z 2809/2912 VRB05KT P6SM SCT015 BKN040 FM281400 33008KT P6SM SCT040 BKN070 PROB30 2818/2824 4SM -SHRA BR BKN040 FM290100 35009KT P6SM FEW040

flight Live Traffic

flight_takeoff 166 Departures
flight_land 154 Arrivals

Arrival

STL KSTL VFR

St. Louis Lambert International Airport

St Louis, US

Local time
05:37 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
618 ft
Coordinates
38.7487, -90.3700

cloud Weather

Wind
280° / 3 kt
Visibility
10 SM
Ceiling
FEW 25,000 ft
Temp / Dew
19°C / 17°C
Altimeter
30.12 inHg

Obs: 2026-08-28T09:51:00.000Z

Raw METAR / TAF 
METAR KSTL 280951Z COR 28003KT 10SM FEW250 19/17 A3012 RMK AO2 SLP188 T01890167

TAF KSTL 280858Z 2809/2912 VRB04KT P6SM FEW250 FM281600 06006KT P6SM FEW050

flight Live Traffic

flight_takeoff 96 Departures
flight_land 76 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A27737 LGA → STL Jul 26, 02:05 UTCJul 26, 05:55 UTC3h 50m - -
2026-07-26 A27737 LGA → STL Jul 26, 02:03 UTCJul 26, 05:54 UTC3h 51m +28m +5m
2026-07-25 ABD50F LGA → STL Jul 25, 03:55 UTCJul 25, 07:45 UTC3h 50m - -
2026-07-24 AC5B20 LGA → STL Jul 24, 03:35 UTCJul 24, 06:00 UTC2h 25m - -
2026-07-24 AC5B20 LGA → STL Jul 24, 03:33 UTCJul 24, 07:26 UTC3h 53m +38m +6m
2026-07-23 AB5F87 LGA → STL Jul 23, 03:50 UTCJul 23, 07:45 UTC3h 55m - -
2026-07-22 AC6204 LGA → STL Jul 22, 03:10 UTCJul 22, 05:25 UTC2h 15m - -
2026-07-22 AC6204 LGA → STL Jul 22, 03:07 UTCJul 22, 07:00 UTC3h 53m +17m +4m
2026-07-21 ABF2EA LGA → STL Jul 21, 04:10 UTCJul 21, 08:00 UTC3h 50m - -
2026-07-20 ABF3DA - Jul 20, 03:25 UTCJul 20, 07:10 UTC3h 45m - -
2026-07-19 AA6BED - Jul 19, 02:35 UTCJul 19, 06:15 UTC3h 40m - -
2026-07-18 AC2836 - Jul 18, 03:20 UTCJul 18, 07:05 UTC3h 45m - -
2026-07-17 AC4FFB - Jul 17, 04:20 UTCJul 17, 08:00 UTC3h 40m - -
2026-07-16 AC0F03 - Jul 16, 04:00 UTCJul 16, 07:35 UTC3h 35m - -
2026-07-15 AC011D - Jul 15, 04:05 UTCJul 15, 07:40 UTC3h 35m - -
2026-07-14 AC5326 - Jul 14, 03:15 UTCJul 14, 06:50 UTC3h 35m - -
2026-07-13 AC4F92 - Jul 13, 03:50 UTCJul 13, 07:30 UTC3h 40m - -
2026-07-12 ACDDE3 - Jul 12, 01:45 UTCJul 12, 05:30 UTC3h 45m - -
2026-07-12 ACDDE3 MDW → SMF Jul 12, 01:44 UTCJul 12, 05:27 UTC3h 43m +9m -3m
2026-07-11 AC5746 - Jul 11, 04:35 UTCJul 11, 08:30 UTC3h 55m - -
2026-07-10 AC62A9 - Jul 10, 03:45 UTCJul 10, 07:50 UTC4h 5m - -
2026-07-10 AC62A9 MDW → SMF Jul 10, 03:43 UTCJul 10, 07:46 UTC4h 3m +48m +38m
2026-07-09 AC0F93 - Jul 9, 03:20 UTCJul 9, 07:25 UTC4h 5m - -
2026-07-08 AC36A9 MDW → SMF Jul 8, 03:35 UTCJul 8, 07:30 UTC3h 55m - -
2026-07-07 AC6A1F - Jul 7, 03:50 UTCJul 7, 07:40 UTC3h 50m - -
2026-07-06 AC57AF - Jul 6, 03:10 UTCJul 6, 07:05 UTC3h 55m - -
2026-07-06 AC57AF MDW → SMF Jul 6, 03:08 UTCJul 6, 06:57 UTC3h 49m +18m +11m
2026-07-03 AB5F87 LGA → STL Jul 3, 04:35 UTCJul 3, 07:45 UTC3h 10m - -
2026-07-02 AC0B96 LGA → STL Jul 2, 03:20 UTCJul 2, 07:10 UTC3h 50m - -
2026-07-01 AC5041 LGA → STL Jul 1, 03:05 UTCJul 1, 07:05 UTC4h 0m - -

Performance history

Flights tracked
69 showing last 30
Avg arrival delay
+10m
On-time arrival
83% 83% on time
Aircraft used
23

Monthly activity 2 months

Month Flights tracked
July 2026 30
June 2026 39

SWA4121 frequently asked

Where does flight SWA4121 fly?
SWA4121 (Southwest Airlines) flies from LGA to STL. View the full route page.
How long is flight SWA4121?
Based on observed flights, SWA4121 takes on average 3h 42m from takeoff to landing.
How often does SWA4121 fly?
SWA4121 has been observed flying several times a week in our tracking data. We've recorded 69 flights under this callsign.
Is flight SWA4121 usually on time?
Across recent flights, SWA4121 arrives with an average 10-minute delay. 83% of flights arrive within 15 minutes of schedule.
What aircraft operates flight SWA4121?
SWA4121 has been operated by 23 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track SWA4121 live?
Yes. When SWA4121 is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.