Southwest Airlines is currently in the rolling_out phase with a very high fleet coverage ratio of 86.2%, which would normally anchor the probability near this level. However, perplexity-verified context and recent news confirm that as of May 2026, Southwest has not yet equipped any aircraft with Starlink, and no community sightings or observations exist on this route. Given the rollout has not started and zero confirmed equipped aircraft, the probability must be anchored to the empirical observation rate of 0.0%. The high fleet ratio cannot be used as a floor because the rollout is not yet active. Therefore, the probability remains at 0.0 with unlikely confidence.