About 69% Starlink odds, weighted to recent UA1561 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 236 recent flights; Starlink found in 15 of 35 Wi-Fi checks since Jan 2, 2026 (last N75435, Oct 13, 2026).
Aircraft seen on UA1561: Boeing 737-900ER, Airbus A321neo, Boeing 737 MAX 9, Boeing 737-800.