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flight_takeoff Flight

SWA420

Operated by Southwest Airlines

Live map

Live map filtered to SWA420. Shown when the flight is currently airborne.

Route airports View route page →

Departure

BOS KBOS VFR

Boston Logan International Airport

Boston, US

Local time
21:09 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
20 ft
Coordinates
42.3620, -71.0079

cloud Weather

Wind
310° / 9G17 kt
Visibility
10 SM
Ceiling
FEW 5,500 ft, SCT 7,000 ft, BKN 25,000 ft
Temp / Dew
27°C / 17°C
Altimeter
29.96 inHg

Obs: 2026-08-28T23:54:00.000Z

Raw METAR / TAF 
METAR KBOS 282354Z 31009G17KT 10SM FEW055 SCT070 BKN250 27/17 A2996 RMK AO2 SLP146 T02720172 10283 20244 53004 $

TAF KBOS 282320Z 2900/3006 28008KT P6SM FEW050 FM290400 34010G18KT P6SM FEW050 FM291300 02006KT P6SM SKC FM291600 12010KT P6SM SKC FM300000 19006KT P6SM SKC

flight Live Traffic

flight_takeoff 159 Departures
flight_land 143 Arrivals

Arrival

STL KSTL VFR

St. Louis Lambert International Airport

St Louis, US

Local time
20:09 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
618 ft
Coordinates
38.7487, -90.3700

cloud Weather

Wind
70° / 3 kt
Visibility
10 SM
Ceiling
SCT 6,500 ft, BKN 25,000 ft
Temp / Dew
27°C / 14°C
Altimeter
30.10 inHg

Obs: 2026-08-29T00:51:00.000Z

Raw METAR / TAF 
METAR KSTL 290051Z 07003KT 10SM SCT065 BKN250 27/14 A3010 RMK AO2 SLP181 T02720139

TAF KSTL 282325Z 2900/3006 VRB03KT P6SM FEW250 FM291600 16008KT P6SM FEW070 SCT250

flight Live Traffic

flight_takeoff 48 Departures
flight_land 52 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-25 A1CE16 BOS → STL Jul 25, 10:15 UTCJul 25, 11:25 UTC1h 10m - -
2026-07-25 A1CE16 BOS → STL Jul 25, 10:12 UTCJul 25, 11:20 UTC1h 8m +12m +21m
2026-07-24 ABD1E3 BOS → STL Jul 24, 09:55 UTCJul 24, 11:00 UTC1h 5m - -
2026-07-24 ABD1E3 BOS → STL Jul 24, 09:54 UTCJul 24, 10:54 UTC1h 0m +4m +3m
2026-07-23 ABB1DE BOS → STL Jul 23, 10:00 UTCJul 23, 11:00 UTC1h 0m - -
2026-07-22 AC17B0 BOS → STL Jul 22, 11:10 UTCJul 22, 11:20 UTC10m - -
2026-07-21 AC61BC BOS → STL Jul 21, 10:10 UTCJul 21, 11:10 UTC1h 0m - -
2026-07-21 AC61BC BOS → STL Jul 21, 10:04 UTCJul 21, 11:09 UTC1h 5m +14m +16m
2026-07-20 A146CE - Jul 20, 10:10 UTCJul 20, 11:10 UTC1h 0m - -
2026-07-20 A146CE BDL → BWI Jul 20, 10:08 UTCJul 20, 11:12 UTC1h 4m +18m +12m
2026-07-20 AB5BB1 - Jul 20, 04:15 UTCJul 20, 05:35 UTC1h 20m - -
2026-07-18 A1CA5F - Jul 18, 10:05 UTCJul 18, 11:25 UTC1h 20m - -
2026-07-18 A1CA5F BDL → BWI Jul 18, 10:04 UTCJul 18, 11:20 UTC1h 17m +4m +11m
2026-07-17 AC6622 - Jul 17, 10:00 UTCJul 17, 10:55 UTC55m - -
2026-07-17 AC6622 BDL → BWI Jul 17, 09:54 UTCJul 17, 10:54 UTC1h 0m +4m +10m
2026-07-16 AC6668 - Jul 16, 11:05 UTCJul 16, 11:20 UTC15m - -
2026-07-16 AC6668 - Jul 16, 10:04 UTCJul 16, 11:20 UTC1h 15m - -
2026-07-16 AC6668 BDL → BWI Jul 16, 09:59 UTCJul 16, 10:50 UTC51m +9m +8m
2026-07-15 ABC14D HFD → BWI Jul 15, 10:00 UTCJul 15, 11:00 UTC1h 0m - -
2026-07-15 ABC14D BDL → BWI Jul 15, 09:57 UTCJul 15, 10:50 UTC53m +7m +11m
2026-07-14 AC53B2 - Jul 14, 10:15 UTCJul 14, 11:15 UTC1h 0m - -
2026-07-13 A63BF4 - Jul 13, 10:00 UTCJul 13, 11:00 UTC1h 0m - -
2026-07-13 ABF3DA - Jul 13, 01:35 UTCJul 13, 03:05 UTC1h 30m - -
2026-07-13 ABF3DA BHM → HOU Jul 13, 01:34 UTCJul 13, 03:04 UTC1h 30m +34m +19m
2026-07-11 A2E28F - Jul 11, 10:15 UTCJul 11, 11:10 UTC55m - -
2026-07-11 A2E28F BDL → BWI Jul 11, 10:11 UTCJul 11, 11:13 UTC1h 2m +11m +15m
2026-07-10 AC7188 - Jul 10, 10:10 UTCJul 10, 11:05 UTC55m - -
2026-07-09 ABC455 - Jul 9, 09:55 UTCJul 9, 10:55 UTC1h 0m - -
2026-07-08 AC2FC3 - Jul 8, 10:05 UTCJul 8, 11:10 UTC1h 5m - -
2026-07-07 AC6645 BDL → BWI Jul 7, 10:05 UTCJul 7, 11:15 UTC1h 10m - -

Performance history

Flights tracked
137 showing last 30
Avg arrival delay
+13m
On-time arrival
70% 70% on time
Aircraft used
19

Monthly activity 4 months

Month Flights tracked
July 2026 40
June 2026 38
May 2026 37
April 2026 22

SWA420 frequently asked

Where does flight SWA420 fly?
SWA420 (Southwest Airlines) flies from BOS to STL. View the full route page.
How long is flight SWA420?
Based on observed flights, SWA420 takes on average 1h 2m from takeoff to landing.
How often does SWA420 fly?
SWA420 has been observed flying several times a week in our tracking data. We've recorded 137 flights under this callsign.
Is flight SWA420 usually on time?
Across recent flights, SWA420 arrives with an average 13-minute delay. 70% of flights arrive within 15 minutes of schedule.
What aircraft operates flight SWA420?
SWA420 has been operated by 19 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track SWA420 live?
Yes. When SWA420 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.