Southwest Airlines currently has a fleet coverage of 86.2% but is still in the rolling_out phase with zero aircraft equipped as of the latest verified context. No flights on the SMF->HOU route have confirmed Starlink tails, and there are no recent news or community sightings supporting Starlink presence on this route. Although the fleet coverage is high, the rollout has not yet started, so the probability remains anchored at zero reflecting the current lack of equipped aircraft and observations.