Southwest Airlines is currently in a rolling_out status with a high fleet coverage ratio of 86.2%, which normally would imply a high probability of Starlink presence on routes. However, perplexity-verified context and recent data indicate that as of mid-2026, Southwest has not yet equipped any aircraft with Starlink, and there are zero confirmed observations or sightings on the BOS->ATL route. Given the announced rollout starting summer 2026 and no recent news or sightings, the probability is anchored conservatively below fleet coverage but above zero to reflect imminent rollout and high fleet coverage potential.