A member of Nok Air's ground staff smiles as passengers check in for their flight at Hat Yai airport June 20, 2013. Shares in budget carrier Nok Airlines Pcl jumped 12 percent to 29 baht ($0.94) versus its IPO price of 26 baht ($0.84) on its market debut, outperforming other airline shares, thanks to its attractive valuation and growth prospect. REUTERS/Damir Sagolj (THAILAND - Tags: SOCIETY BUSINESS TRANSPORT)