Over 99% Starlink odds, weighted to recent UA5531 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 66 recent flights; Starlink found in 6 of 7 Wi-Fi checks since Feb 11, 2026 (last N133SY, Sep 24, 2026).
Aircraft seen on UA5531: Embraer E-175.