About 48% Starlink odds, weighted to recent UA546 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 166 recent flights; Starlink found in 10 of 34 Wi-Fi checks since Jan 17, 2026 (last N34574, Oct 13, 2026).
Aircraft seen on UA546: Airbus A321neo, Boeing 737-900ER, Boeing 737 MAX 9, Airbus A319.