WN 4143 — Sacramento to San Diego
WN 4143 Schedule
Southwest Airlines flies SMF to SAN 3 days a week (Mon Thu Fri). Scheduled block time is 1h 35m. Typically a Boeing 737 MAX 7.
Boeing 737 MAX 7 (7S7)
Scheduled equipment: Boeing 737 MAX 7. Boeing-built. Registration, build year, and photo fill in the moment the aircraft broadcasts.
WN 4143 Flight Path
Cruise altitude, ground speed, and vertical rate from ADS-B broadcasts. The altitude profile fills in while WN 4143 is airborne, capturing climbs, step-climbs, and descents in real time.
Flight path chart appears once WN 4143 is airborne and broadcasting.
Frequently Asked Questions
If a plane icon is moving on the map, yes. That's ADS-B, the aircraft's own GPS position broadcast, updated every few seconds. No icon means the flight isn't airborne at the moment: either before pushback, already landed, or a day it doesn't operate.
Scheduled equipment is the 7S7. The live tracker shows the actual tail and registration when WN 4143 is airborne. Carriers swap aircraft often enough that you'll sometimes see a different airframe than the scheduled type.
Mon Thu Fri. 3 days a week. On days outside that pattern this page will show the schedule but no live aircraft.
Scheduled 1h 35m gate to gate from SMF to SAN. Actual air time varies with winds and ATC routing. Tailwinds can shave 15 to 20 minutes on long segments.
GPS-accurate via ADS-B. Typically within 30 meters horizontally, updated every 5 to 10 seconds. If the broadcast drops over oceans or mountainous terrain, the map holds the last-known position and the label changes to reflect the signal gap.
A projection from current position, groundspeed, and remaining distance. It doesn't account for descent procedures, holding, or ATC vectoring near the destination. Trust it within plus or minus 10 minutes once the flight is past the halfway mark.