Southwest Airlines is currently in the rolling_out phase with a high fleet coverage ratio of 86.2%, but as of the latest data (2026-05-20), no aircraft are equipped yet and no confirmed Starlink observations exist on the DCA->AUS route. The perplexity-verified context confirms zero equipped aircraft with high confidence. Given the rollout has not started and no recent news or sightings support Starlink presence, the probability remains at 0.0 despite the high fleet coverage ratio. The fleet ratio is not used as a floor here because rollout status is rolling_out and no equipment is yet installed.