About 73% Starlink odds, weighted to recent UA5840 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 61 recent flights; Starlink found in 16 of 19 Wi-Fi checks since Jan 15, 2026 (last N625UX, Oct 19, 2026).
Aircraft seen on UA5840: Embraer E-175, Bombardier CRJ-550, Mitsubishi CRJ-200LR.