About 34% Starlink odds, weighted to recent UA504 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 58 recent flights; Starlink found in 1 of 11 Wi-Fi checks since Mar 12, 2026 (last N37538, Oct 5, 2026).
Aircraft seen on UA504: Boeing 737 MAX 9, Boeing 737 MAX 8, Boeing 737-800, Boeing 737.