About 25% Starlink odds, weighted to recent UA1589 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 69 recent flights; Starlink found in 2 of 9 Wi-Fi checks since Jan 2, 2026 (last N37290, Sep 10, 2026).
Aircraft seen on UA1589: Boeing 737-800, Airbus A319, Airbus A320, Boeing 737.