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 many aircraft. However, there are zero observed flights with confirmed Starlink on the STL->PBI route, and no recent news or community sightings support higher confidence. The 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 conservatively at 0.30, reflecting the fleet coverage floor for rolling_out airlines, despite zero observations.