About 83% Starlink odds, weighted to recent UA558 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 84 recent flights; Starlink found in 21 of 27 Wi-Fi checks since Mar 12, 2026 (last N14518, Oct 19, 2026).
Aircraft seen on UA558: Airbus A321neo, Boeing 737-900ER, Boeing 737-900, Boeing 737.