About 24% Starlink odds, weighted to recent UA1863 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 49 recent flights; Starlink found in 5 of 26 Wi-Fi checks since Jan 2, 2026 (last N17245, Aug 8, 2026).
Aircraft seen on UA1863: Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800, Airbus A319.