About 25% Starlink odds, weighted to recent UA1557 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 137 recent flights; Starlink found in 8 of 24 Wi-Fi checks since Jan 17, 2026 (last N69804, Sep 3, 2026).
Aircraft seen on UA1557: Airbus A319, Boeing 737-900ER, Boeing 737-700, Airbus A320.