Feb 28 (Reuters) - Virgin Australia Holdings Ltd VAH.AX :
* H1 GROUP UNDERLYING PROFIT BEFORE TAX OF $102.5 MILLION, UP 142.3 PERCENT
* EXPECT GROUP'S UNDERLYING PERFORMANCE FOR H2 TO IMPROVE OVER 2H2017
* "VIRGIN AUSTRALIA INTRODUCING A NEW DAILY SYDNEY TO HONG KONG SERVICE FROM MID THIS YEAR"