About 64% Starlink odds, weighted to recent UA5391 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 61 recent flights; Starlink found in 5 of 5 Wi-Fi checks since Jun 14, 2026 (last N533GJ, Sep 20, 2026).
Aircraft seen on UA5391: Bombardier CRJ-550, Embraer E-175.