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 PDX->DAL route. The rollout is announced to begin in summer 2026, so no current deployments are expected. Given zero observations and no equipped aircraft, the probability is anchored at 0.0 despite the high fleet ratio, consistent with the rollout status and verified context.