United Airlines has installed Starlink on 53.4% of its fleet, with confirmed completion of rollout on 300+ regional aircraft and plans to reach over 800 planes soon. However, there are no direct observations of Starlink on the SFO->STL route, and recent news highlights initial mainline flights with Starlink on other routes (EWR->LAS, Boeing 737-800). Given the fleet coverage and rollout status, but zero direct route observations, the probability is anchored near the fleet coverage but slightly reduced to reflect lack of route-specific sightings, resulting in a conservative estimate of 0.40.

Last calculated May 21, 2026