Southwest Airlines is currently in the rolling_out phase with a very 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 news confirm that as of mid-2026, Southwest has not yet equipped any aircraft with Starlink, and no observations or sightings exist on the PHX->BHM route. Given the rollout has not started and no confirmed equipped aircraft exist, the probability must be anchored at 0.0 despite the high fleet coverage ratio. The confidence in this estimate is high due to strong official announcements and lack of contrary evidence.