United Airlines has a fleet coverage of approximately 52.2% for Starlink-equipped aircraft, indicating a moderate rollout stage. However, there are zero confirmed Starlink observations on the STL -> IAD route, which anchors the probability to the empirical observation rate of 0.0%. Recent high-confidence news confirms Starlink is operational on some United aircraft, but primarily on other routes such as EWR to LAS and regional US routes, with no specific mention of STL -> IAD. Given the fleet coverage and rollout status, the probability is anchored at the fleet coverage level but not increased beyond it due to lack of route-specific observations or sightings. The confidence in this estimate is medium due to the mixed evidence and absence of direct route data.

Last calculated May 20, 2026