Southwest Airlines is currently in the announced rollout phase for Starlink with zero aircraft equipped as of the latest data. The fleet coverage is high at 86.2%, but this reflects planned future installations rather than current capability. There are no observed flights with Starlink on the RDU->STL route, no recent news indicating active deployment, and no community sightings. Given the rollout status is 'rolling_out' but with zero equipped aircraft, the probability must be anchored to the empirical observation rate of 0.0%.