American: \$1 Bln More in '04 Fuel Expense  CHICAGO (Reuters) - American Airlines expects soaring jet  fuel prices to push its expenses up more than \$1 billion in  2004 from last year's level, parent AMR Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=AMR.N target=/stocks/quickinfo/fullquote"&gt;AMR.N&lt;/A&gt; said on  Thursday.