The conservative group Judicial Watch obtained records that put the price of the presidential delegation's trip to more than $467,000. The amount does not include the round-trip cost of flying Air Force One and another 747 to the International Olympic Committee meeting.
President Obama was in Copenhagen for less than a day. The first lady was there longer to lobby IOC members.
Chicago's Olympic competitors also had their heads of state present. The White House has not responded to a request for comment.