About 17% Starlink odds, weighted to recent UA439 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 53 recent flights; Starlink found in 1 of 8 Wi-Fi checks since Jan 30, 2026 (last N35260, Sep 30, 2026).
Aircraft seen on UA439: Boeing 737-800, Airbus A320, Airbus A319.