Southwest Airlines is currently in the rolling_out phase with a high fleet coverage ratio of 86.2%, indicating a strong likelihood of Starlink installation on their aircraft in the near future. However, there are zero observed flights with confirmed Starlink on the MIA->AUS route and no recent news or community sightings to support a higher probability. Perplexity context confirms no current equipped aircraft as of May 2026, with rollout expected to begin in summer 2026. Given the rollout status and high fleet ratio, the probability is anchored at a conservative floor of 0.30, reflecting the airline's announced rollout but lack of current empirical evidence on this route.