Southwest Airlines is currently in the rolling_out phase with a high fleet coverage ratio of 86.2%, which would normally suggest a high probability of Starlink availability on routes. However, perplexity-verified context and recent data indicate that as of May 2026, Southwest has not yet equipped any aircraft with Starlink, and there are zero confirmed observations or community sightings on the HOU->SRQ route. No recent news supports earlier deployment. Given these factors, the probability is anchored at 0.0, reflecting the current lack of equipped aircraft despite the high fleet coverage ratio, which will increase once rollout begins.