Southwest Airlines is currently in a rolling_out status with a high fleet coverage ratio of 86.2%, but no aircraft are yet equipped as of the latest verified context. There are zero confirmed Starlink observations on the BNA->SAT route, and no recent news or community sightings to suggest active deployment on this route. Given the rollout is announced to begin in summer 2026 and no equipped aircraft exist yet, the probability is anchored conservatively at 0.30, reflecting the fleet coverage floor for rolling_out airlines with high fleet ratios, but not exceeding the empirical observation rate by more than 0.10 due to lack of direct evidence.