Domestic airlines reported 12,514 delayed flights in the first four months of this year, accounting for 15.4% of the total operated flights, up 1.9% on-year. According to the Civil Aviation Administration of Vietnam (CAAV), Vietnam Airlines, Vietjet Air, Jetstar Pacific, Bamboo Airways and Vietnam Air Services Company (VASCO) conducted a total of 81,193 flights in the four-month period, up 9.5% on-year. Passengers at Tan Son Nhat International Airport Among those, national flag carrier Vietnam Airlines had 33,417 flights, up 2.8% against the same period of last year. It was followed by budget airline VietJet with 33,646 flights, up 15%. Meanwhile, Jetstar Pacific and Vasco saw the flight decrease. Newly-opened Bamboo Airways provided 2,024 flights. There were 12,514 delayed flights between January and April accounting for 15.4% of the total operated flights, up 1.9% on-year. Budget airline Jetstar Pacific had the highest rate of delayed flights with 2,324 flights, 26.4% of its operated flights during the period. They were followed by Vietjet 18.5% with 6,227 flights; Vietnam Airlines 10.7% (3,561 flights); Vasco 7.7% (255 flights) and Bamboo Airways 7.3% (147 flights). In the period, 130 flights were cancelled, equal to 0.2% of the conducted flights. Vietnam Airlines had 43 flights, Vietjet with 33, Vasco with 54. Meanwhile, Jetstar Pacific and Bamboo Airways did not cancel any flight.