About 97% Starlink odds, weighted to recent UA5404 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 49 recent flights; Starlink found in 16 of 18 Wi-Fi checks since Jan 1, 2026 (last N608UX, Sep 8, 2026).
Aircraft seen on UA5404: Embraer E-175, Bombardier CRJ-700, Bombardier CRJ-550, Mitsubishi CRJ-701ER.