About 46% Starlink odds, weighted to recent UA537 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 100 recent flights; Starlink found in 7 of 14 Wi-Fi checks since Jan 15, 2026 (last N18243, Oct 13, 2026).
Aircraft seen on UA537: Boeing 737-800, Boeing 737-900ER, Airbus A320, Airbus A319.