United Airlines has an installed rollout status with a fleet coverage of 36.7%, which sets a floor for the probability on this route despite zero direct observations. The lack of observed Starlink flights on CHS->BNA is likely due to incomplete flight tracking data rather than absence of Starlink equipment. Recent high-confidence news confirms ongoing installation and active use of Starlink on United's mainline and regional fleets, supporting a probability anchored at the fleet coverage ratio. Community sightings confirm rollout completion on regional routes, but no specific sightings on this route exist. Therefore, the probability is conservatively set at the fleet coverage floor of 0.367 with a 'likely' confidence tier.