About 67% Starlink odds, weighted to recent UA1504 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 81 recent flights; Starlink found in 4 of 17 Wi-Fi checks since Jan 2, 2026 (last N35204, Sep 24, 2026).
Aircraft seen on UA1504: Boeing 737-800, Boeing 737 MAX 9, Airbus A319, Boeing 737-900ER.