Southwest Airlines is currently in the rolling_out phase with a high fleet coverage ratio of 86.2%, indicating a strong eventual presence of Starlink on its aircraft. However, as of the latest data (2026-05-20), no aircraft are equipped yet, and there are zero confirmed Starlink observations on the MCI->SAT route. The rollout is announced to begin in summer 2026, so current probability must remain low but not zero, reflecting imminent deployment. Given no recent news or sightings, the probability is anchored near zero with a small uplift to reflect the announced rollout status and high fleet coverage, but not exceeding 0.10 due to lack of direct evidence.