Southwest Airlines is currently in the rolling_out phase with a very 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 no confirmed sightings or observations exist on the DAL->SDF route. Given the rollout is planned to start in summer 2026 and no recent news or sightings support current availability, the probability is anchored at 0.0 reflecting the current empirical evidence despite the high fleet coverage ratio.