About 4% Starlink odds, weighted to recent UA990 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 134 recent flights; Starlink found in 1 of 21 Wi-Fi checks since Jan 2, 2026 (last N37018, Sep 18, 2026).
Aircraft seen on UA990: Boeing 777-200ER, Boeing 777-200.