About 32% Starlink odds, weighted to recent UA1856 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 89 recent flights; Starlink found in 2 of 4 Wi-Fi checks since Feb 26, 2026 (last N77431, Oct 16, 2026).
Aircraft seen on UA1856: Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800, Airbus A321.