Stocks to Watch on October 28  NEW YORK (Reuters) - U.S. stocks to watch on Thursday:  DELTA AIR LINES &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DAL.N target=/stocks/quickinfo/fullquote"&gt;DAL.N&lt;/A&gt;: The air carrier's pilots union said  late Wednesday it reached a tentative agreement with the  airline on cost savings.