Southwest Airlines is currently in the rollout phase for Starlink with a fleet coverage of 86.2%, which is high. However, as of the latest data (2026-05-20), no aircraft are equipped yet, and there are zero confirmed Starlink observations on the MDW-PHL route. The perplexity context confirms zero equipped aircraft with high confidence. No recent news or community sightings support higher probability. Given the rollout status 'rolling_out' and zero equipped aircraft, the probability must be anchored to the empirical observation rate of 0.0%, despite the high fleet coverage expected in the future.