I don't know where to begin. My two children, aged 13 and 16, were traveling from Boston to San Francisco via Philadelphia on US Air. They arrived in Philadelphia at 4 PM and went to their gate for the connecting flight which was scheduled for 5:45. Flight was delayed twice and then finally was scheduled for departure. However, they told my kids that the flight was overbooked and that one of them would have to stay behind. It was actually the 13 year old that was involuntarily bumped. When I made the reservation US Air told me that he could not travel alone but it would be possible for him to travel with his 16 year old sister. However, US Air apparently felt that it was OK to bump him. My daughter, of course, refused to fly without him. So, she stayed behind as well. They gave her a voucher for $425 for future travel and gave my son a check for $100. They also gave them $50 in food vouchers and told them to take the shuttle to the Hilton Hotel! My kids did eventually find their way to the shuttle after getting some food in the airport and asking many different people where they could find the shuttle. They arrived at the Hilton about 10:30 PM after taking the shuttle and the hotel refused to accommodate them because they were unaccompanied minors. I could not be reached and was unaware that all of this was happening. I thought they were safely on their flight to SFO. I don't fault Hilton for not accepting them. I believe they were correct in their decision. However, US Air is a completely different story. Hilton called US Air to come and pick up the kids. After about an hour, they sent a chaperone to pick them up and take them back to the airport where they had to wait until the woman finished her shift. She then took them to the airport Marriott and checked them into a room and took the room next door for herself. My daughter was frantic with worry during this whole ordeal. They eventually got on their flight the next morning at 7:45 am. I just don't know what to do about this. I feel that US Air was completely out of line making 2 children stay behind by themselves. Does anybody know what can be done about this or who I can speak to in order to lodge a complaint? Any help would be appreciated.