About 45% Starlink odds, weighted to recent UA2019 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 142 recent flights; Starlink found in 14 of 36 Wi-Fi checks since Jan 2, 2026 (last N13248, Oct 17, 2026).
Aircraft seen on UA2019: Boeing 737 MAX 8, Boeing 737-800, Boeing 737 MAX 9, Boeing 737-900ER.