About 97% Starlink odds, weighted to recent UA5239 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 85 recent flights; Starlink found in 19 of 19 Wi-Fi checks since Feb 23, 2026 (last N608UX, Oct 16, 2026).
Aircraft seen on UA5239: Embraer E-175, Bombardier CRJ-550.