About 15% Starlink odds, weighted to recent UA1951 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 66 recent flights; Starlink found in 4 of 7 Wi-Fi checks since Mar 23, 2026 (last N17403, Oct 13, 2026).
Aircraft seen on UA1951: Boeing 737 MAX 9, Boeing 737 MAX 8, Boeing 737-900ER, Boeing 737-800.