About 30% Starlink odds, weighted to recent UA3881 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.
Based on 22 recent flights; Starlink found in 3 of 6 Wi-Fi checks since Jun 30, 2026 (last N79402, Sep 29, 2026).
Aircraft seen on UA3881: Boeing 737-900, Boeing 737-900ER, Boeing 737 MAX 9, Airbus A321neo.