About 19% Starlink odds, weighted to recent UA1039 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 74 recent flights; Starlink found in 1 of 7 Wi-Fi checks since Jan 31, 2026 (last N17401, Sep 17, 2026).
Aircraft seen on UA1039: Boeing 737 MAX 9, Boeing 737.