3M

The only ALIGNED candidate is KSFO (Δhdg 20°, 1540 nm), matching the plane's westbound heading (271.94°) and a recurring destination from the briefing. The plane is at cruise altitude (47,000 ft) with sufficient range, and recent flights were short hops, so this is likely a cross-country leg. Confidence is high because KSFO is both aligned and a frequent destination. KIAH (Δhdg 30°) is included as an alternate as a recurring destination and not behind the plane.