About 18% Starlink odds, weighted to recent UA2129 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 83 recent flights; Starlink found in 6 of 20 Wi-Fi checks since Apr 6, 2026 (last N57439, Aug 8, 2026).
Aircraft seen on UA2129: Boeing 737 MAX 9, Boeing 737-900ER, Boeing 737-800.