Southwest Airlines is currently in the rollout phase with a high fleet coverage ratio of 86.2%, which normally would imply a high probability of Starlink presence on routes. However, perplexity-verified context indicates zero aircraft currently equipped, and there are no confirmed observations or sightings on the ATL-OKC route. Given the announced rollout starting summer 2026 and no recent news or sightings, the probability is anchored low, slightly above zero to reflect imminent rollout but no current deployment.