About 55% Starlink odds, weighted to recent UA1209 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 171 recent flights; Starlink found in 9 of 31 Wi-Fi checks since Jan 2, 2026 (last N54570, Oct 14, 2026).
Aircraft seen on UA1209: Airbus A321neo, Boeing 737 MAX 8, Boeing 737-900ER, Boeing 737 MAX 9.