Southwest Airlines is currently in the rollout phase with a high fleet coverage ratio of 86.2%, which would normally suggest a high probability of Starlink presence on routes. However, perplexity-verified context indicates that as of May 2026, Southwest has not yet equipped any aircraft with Starlink, and there are zero confirmed observations or sightings on the MCO->SMF route. No recent news supports earlier deployment. Given the rollout status and zero current equipment, the probability is anchored at 0.0, reflecting the current lack of Starlink on Southwest aircraft despite the high fleet coverage ratio planned for the future.