Boeing ( BA) has notched an order for 10 new Boeing 737-800s that could be worth as much as $695 million. German travel group TUI said Thursday that it signed a contract with Boeing to deliver the planes from early 2006 to mid-2007 to TUI's Hapag-Lloyd Flug airline, which plans to convert to an all-Boeing fleet. The airline will sell its five A310 jets from Boeing rival Airbus. "We are making use of the current opportunity of buying cost-efficient aircraft at attractive prices to renew our fleet and retain the flexibility of our capacity planning," said Sebastian Ebel, a director on TUI's board, in a news release. "We also benefit from the current favorable exchange rate." A Boeing spokesman said he could not confirm the order. Although TUI's release did not specify the order's price, Boeing's 2004 list prices for the 737-800 range between $61.5 million and $69.5 million.