About 61% Starlink odds, weighted to recent UA259 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 137 recent flights; Starlink found in 16 of 34 Wi-Fi checks since Feb 16, 2026 (last N34535, Oct 18, 2026).
Aircraft seen on UA259: Airbus A321neo, Airbus A319, Boeing 737 MAX 9, Boeing 737-800.