About 19% Starlink odds, weighted to recent UA1531 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 117 recent flights; Starlink found in 5 of 18 Wi-Fi checks since Feb 15, 2026 (last N14549, Aug 8, 2026).
Aircraft seen on UA1531: Airbus A319, Airbus A321neo, Boeing 737-800, Boeing 737-900ER.