Utilize the input text as a context reference, choose the right relationship between 'American Airlines Group' and 'US Airways' from the options.
Options: original broadcaster, chairperson, owned by, owner of

Shares of United over the past five years have generated about half the return of rival Delta Air Lines , and analysts have worried the company is falling behind once-bankrupt American Airlines Group as that company integrates its merger with US Airways Group .
owner of