About 26% Starlink odds, weighted to recent UA1021 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 94 recent flights; Starlink found in 2 of 17 Wi-Fi checks since Jan 2, 2026 (last N17405, Oct 26, 2026).
Aircraft seen on UA1021: Boeing 737 MAX 9, Boeing 737, Boeing 737-900.