Delta Air Lines Posts a Larger Loss  CHICAGO (Reuters) - Delta Air Lines Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DAL.N target=/stocks/quickinfo/fullquote"&gt;DAL.N&lt;/A&gt; on  Wednesday reported a wider quarterly loss on soaring fuel  prices and weak domestic airfares, and said time was running  short as it races to cut costs to avoid bankruptcy.