UPDATE 2-Amazon claims record holiday orders in '08 season

(Adds details on orders, analyst quote, updates shares)

NEW YORK, Dec 26 (Reuters) - Online retailer Amazon.com Inc (AMZN.O) on Friday reported its best holiday sales season yet, even as sales and traffic at U.S. store chains were the weakest in decades, sending its shares up nearly 4 percent.

Analysts have pointed to Amazon as a rare bright spot in this year's holiday shopping season due to its scale and flexibility, as retailers try to outdo each other with deep discounts to lure consumers during a recession.

Online sales were also helped by winter storms that hit large sections of the United States on the last major shopping weekend before Christmas.

In a release titled "Amazon.com's 14th holiday season is best ever," the company said more than 6.3 million items were ordered on its site worldwide for the peak shopping day of Dec. 15, amounting to 72.9 items ordered per second. On its peak day, it shipped more than 5.6 million units.

However, the company gave no financial details regarding the sales, such as how its margins fared with the discounts seen across the retail sector.

Stifel Nicolaus analyst Scott Devitt said Amazon's day of peak orders represented a 17 percent rise from a year ago, while its peak shipments represented an increase of 44 percent. He rates the share a "buy" with a $61 price target.

Amazon shipped merchandise to more than 210 countries, and said it shipped more than 99 percent of orders on time for holiday deadlines.

Amazon shares rose 3.6 percent to $53.31. (Reporting by Michele Gershberg; Editing by Derek Caney and Steve Orlofsky)