About 56% Starlink odds, weighted to recent UA397 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 75 recent flights; Starlink found in 3 of 5 Wi-Fi checks since Mar 24, 2026 (last N69813, Aug 31, 2026).
Aircraft seen on UA397: Boeing 737-900ER, Boeing 737-800.