Southwest Airlines is currently in rollout status with a high fleet coverage ratio of 86.2%, but no aircraft are yet equipped as of the latest data. No route observations or community sightings confirm Starlink presence on BHM->PHX. Given the announced rollout starting summer 2026 and zero confirmed equipped aircraft, the probability is anchored conservatively at 0.30, reflecting the fleet coverage floor for rolling_out airlines with >30% coverage, but not exceeding it due to lack of direct evidence on this route.