Southwest Airlines is currently in the rolling_out phase with a very high fleet coverage ratio of 86.2%, which would normally imply a high probability of Starlink presence on routes. However, perplexity-verified context and recent data confirm that as of May 2026, Southwest has not yet equipped any aircraft with Starlink, and there are zero confirmed observations or sightings on the SMF->STL route. No recent news indicates any change. Therefore, despite the high fleet coverage ratio, the empirical evidence strongly supports a probability near zero at this time.