You might look into buying her a ticket. The fares, at least going to the UK, have been dirt cheap this fall. Maybe coming this way are cheap as well. If you do, what about flying her into say JFK (or other east coast hub) and then connecting her onto your airline.

I just looked at your profile and notice you work for Southwest. Assuming that you gave your daughter the appropriate dependant forms we have a walkup agreement with United. She would just go to the ticket counter to purchase an ID90. They've always been very good to me but I would advise her to get there really early. The staff usually have no idea how to issue such a creature and it takes forever for them to figure it out.

Hope this helps.