Southwest Airlines currently has a fleet coverage of 86.2% but is only in the rollout phase with zero aircraft equipped as of the latest verified context. No flights on the SDF->BWI route have confirmed Starlink, and there are no recent news or community sightings supporting Starlink presence on this route. Given the rollout status and zero equipped aircraft, the probability is anchored at 0.0 despite the high fleet coverage ratio, reflecting the current lack of deployment.