At one time US ran a good amount of charter flights. I would think that they no longer can due to a lack of a spare A/C. The widebody fleet is stretched very thin as it is, so I doubt that any are sitting around for a charter. Delta has a much larger W/B fleet that enables them to shuffle the A/C around for situations such as this. I have worked several charter flights in the past, and the crews have told me that they make a pig-pen of the A/C. I don't think that US should have any A/C livery dedicated to ANY team that doesn't use the Airline. Why advertise for a team that doesn't support your company. If the Eagles want to fly DL, let them paint one of their A/C with the team colors.