About 34% Starlink odds, weighted to recent UA1978 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 145 recent flights; Starlink found in 5 of 9 Wi-Fi checks since Mar 21, 2026 (last N73275, Oct 12, 2026).
Aircraft seen on UA1978: Boeing 737-800, Airbus A319, Airbus A320.