About 30% Starlink odds, weighted to recent UA1544 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 72 recent flights; Starlink found in 6 of 14 Wi-Fi checks since Jan 29, 2026 (last N39423, Aug 10, 2026).
Aircraft seen on UA1544: Boeing 737-900ER, Boeing 737-800, Boeing 737 MAX 9.