US Airways Expands Flight Schedule  NEW YORK (Reuters) - US Airways Group Inc.    &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=UAIRQ.OB target=/stocks/quickinfo/fullquote"&gt;UAIRQ.OB&lt;/A&gt; on  Monday said it will increase capacity and add 230 daily flights  to its operation by increasing utilization of its planes.