About 4% Starlink odds, weighted to recent UA1021 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 75 recent flights; Starlink found in 1 of 15 Wi-Fi checks since Jan 2, 2026 (last N27439, Oct 4, 2026).
Aircraft seen on UA1021: Boeing 737 MAX 9, Boeing 737, Boeing 737-900.