About 12% Starlink odds, weighted to recent UA1635 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 106 recent flights; Starlink found in 1 of 35 Wi-Fi checks since Jan 2, 2026 (last N77431, Jul 13, 2026).
Aircraft seen on UA1635: Boeing 757-300, Boeing 767-400ER, Boeing 737 MAX 9, Boeing 737 MAX 8.