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 EUG->SMF route. The rollout is announced to begin in summer 2026, so no current probability of Starlink availability on this route is justified. Despite the high fleet coverage target, the current empirical observation and verified context indicate zero availability, so the probability is anchored at 0.0 with low confidence until rollout begins.