Airlines that have been asked to get their act together include national carrier Vietnam Airlines, VietJet Air and Jetstar Pacific. Figures from June 1 to 15 show that VietJet Air led the list, with more than 430 of its total 1,094 flights being delayed, or 39.8 percent. Vietnam Airlines had over 190 delayed flights or 12.8 percent. Its subsidiary Jetstar Pacific operated a total of 244 flights, of which over 26 percent was delayed. The Noi Bai airport has instructed the airlines to strengthen their flight operations control to minimise the number of delays, and to improve the experience for passengers.-VNA