Alaska Airlines operates flight AS421 between Seattle (SEA) and San José del Cabo (SJD). This route is typically operated by a 737 MAX 9. Based on Alaska Airlines' current Starlink rollout — 17 of 400 aircraft equipped (4% of the fleet) — we estimate a 0% probability that this specific flight is equipped with Starlink satellite WiFi.
No route-specific aircraft evidence needed: B39M is an operator-wide claim covering every B39M aircraft in the fleet (0.0%).
Equipped
Fleet Size
Coverage
This route is predominantly operated by B38M aircraft. The score reflects Alaska Airlines's confirmed Starlink rollout status for the B38M fleet specifically, not the airline's fleet-wide average.
Starlink coverage on this route is limited. Alaska 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 SEA→SJD updates.
Prediction (0%) reflects the chance this specific flight has Starlink. No route-specific aircraft evidence needed: B39M is an operator-wide claim covering every B39M aircraft in the fleet (0.0%). B39M coverage (0%) shows how many B39M aircraft have Starlink.
Aircraft recently seen operating this flight
Check the Starlink probability on other Alaska Airlines routes.
We estimate a 0% probability that flight AS421 has Starlink WiFi. No route-specific aircraft evidence needed: B39M is an operator-wide claim covering every B39M aircraft in the fleet (0.0%). Alaska Airlines is actively rolling out Starlink across its fleet. Check back as our data updates when new aircraft are confirmed.
Alaska Airlines uses Starlink satellite WiFi on equipped aircraft. Flight AS421 operates SEA to SJD. Our Starlink probability score for this flight is 0%, based on Alaska 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 Alaska Airlines app may show the aircraft registration. You can then search that tail number on StarlinkFlights.com. Alternatively, our probability score for flight AS421 is 0% based on current fleet data.
The prediction for AS421 is based on the aircraft actually observed or claimed to operate this route, not a generic fleet-wide guess. No route-specific aircraft evidence needed: B39M is an operator-wide claim covering every B39M aircraft in the fleet (0.0%). 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.
