Southwest Airlines operates flight WN3421 between San Diego (SAN) and San Francisco (SFO). This route is typically operated by a 737 MAX 8. Based on Southwest Airlines' current Starlink rollout — 8 of 817 aircraft equipped (1% of the fleet) — we estimate a 0% probability that this specific flight is equipped with Starlink satellite WiFi.
No aircraft observed on this route. Score reflects the fleet-wide rate for the recorded aircraft type B38M: 0.3%.
Equipped
Fleet Size
Coverage
Score is based on Southwest Airlines's fleet-wide coverage: 8 of 817 aircraft are Starlink-equipped (1% fleet ratio). No aircraft-type-specific rollout data is recorded for this route, so the score reflects the fleet-wide average.
Starlink coverage on this route is limited. Southwest Airlines has started its Starlink rollout, but this route or aircraft type may not yet be equipped — the probability will rise as more aircraft are confirmed.
No spam. One email when coverage on SAN→SFO updates.
Prediction (0%) reflects the chance this specific flight has Starlink. No aircraft observed on this route. Score reflects the fleet-wide rate for the recorded aircraft type B38M: 0.3%. B38M coverage (0%) shows how many B38M aircraft have Starlink.
Aircraft recently seen operating this flight
Check the Starlink probability on other Southwest Airlines routes.
We estimate a 0% probability that flight WN3421 has Starlink WiFi. No aircraft observed on this route. Score reflects the fleet-wide rate for the recorded aircraft type B38M: 0.3%. Southwest Airlines is actively rolling out Starlink across its fleet. Check back as our data updates when new aircraft are confirmed.
Southwest Airlines uses Starlink satellite WiFi on equipped aircraft. Flight WN3421 operates SAN to SFO. Our Starlink probability score for this flight is 0%, based on Southwest Airlines' fleet rollout data and confirmed tail numbers.
The most reliable method is to check your specific tail number after check-in — your boarding pass or the Southwest Airlines app may show the aircraft registration. You can then search that tail number on StarlinkFlights.com. Alternatively, our probability score for flight WN3421 is 0% based on current fleet data.
The prediction for WN3421 is based on the aircraft actually observed or claimed to operate this route, not a generic fleet-wide guess. No aircraft observed on this route. Score reflects the fleet-wide rate for the recorded aircraft type B38M: 0.3%. A confirmed, dated passenger sighting for this specific flight can override this when one exists.
No prediction can guarantee a specific aircraft. Airlines perform last-minute equipment swaps for maintenance, operational needs, or schedule changes — meaning a Starlink-equipped tail can be replaced by a non-equipped one on the day. A score of 80% or above means historical data strongly favours Starlink on this flight, but it is not a guarantee. For the most reliable information, check the airline's gate display or app on the day of departure.
