My daughter(17) is hoping to go to Germany over Christmas break to visit our german exchange student and I would like to know what airlines anyone recommends. She flew Delta last year with her group but they do not have any non-stop flights. As she is traveling by herself, i would prefer not to have any lay-overs if possible. Lufthansa was a suggestion and they do have non-stop flights out of Chicago. Does anyone have any suggestions or opinions/experiences either way. Thanks so much!