About 35% Starlink odds, weighted to recent UA5904 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 55 recent flights; Starlink found in 6 of 7 Wi-Fi checks since Feb 12, 2026 (last N207SY, May 25, 2026).
Aircraft seen on UA5904: Embraer E-175, Mitsubishi CRJ-200LR.