About 25% Starlink odds, weighted to recent UA1864 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 180 recent flights; Starlink found in 8 of 27 Wi-Fi checks since Jan 16, 2026 (last N68821, Oct 13, 2026).
Aircraft seen on UA1864: Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737 MAX 8, Boeing 737.