Jim Irsay

The aircraft is a Gulfstream GIV-SP owned by Jim Irsay, owner of the Indianapolis Colts, and the current position near St. Louis (KSTL) with a heading of 173° suggests a southward departure, but the strong prior for Indianapolis (KIND) as the home base is the most plausible destination. No candidate airports were provided, so I fall back to the recurring-destinations logic: Irsay's primary base is Indianapolis, and the plane is likely returning there after a stop or repositioning. The low altitude and speed indicate a departure or climb, and the heading is consistent with a route toward Indianapolis after a turn. Confidence is high because the owner's home base is a strong prior, even without a direct alignment in the candidate table.