Through March 31, 2014, SriLankan Airlines FlySmiLes members who rent with Hertz for three to six days can earn double miles, and if you rent for seven days or longer, you can choose between earning double miles or one free rental day. The special offer is available for Hertz rentals at participating locations in the U.S., Canada, Europe, Australia, New Zealand or Asia. For more information, including restrictions, visit http://insideflyerus.wpengine.com/link/?10819