United Airlines has a fleet coverage ratio of 36.7% with Starlink installed and rollout status 'installed'. Although there are zero confirmed Starlink observations on the DEN->JAX route, the airline's overall rollout progress and recent high-confidence news about mainline and regional fleet installations support a probability anchored at the fleet coverage floor. Given the zero observations, the probability is conservatively set at the fleet coverage ratio (0.367 rounded to 0.37). The lack of route-specific sightings prevents a higher score, but the medium confidence from Perplexity and multiple recent news items support a 'likely' tier.