Hanoi, March 25 -- Vietnam's aviation sector is facing mounting cost pressures as it prepares for the long Reunification Day (April 30)-May Day (May 1) holiday and the summer travel peak, with surging fuel prices posing a critical challenge to fare management and operational sustainability. Fuel costs, which account for 35-40% of total operating expenses, have risen sharply in recent time, placing airlines under strain. According to the Ministry of Construction, operating costs have increased by 50-60% for Vietnam Airlines, around 30% for Sun Phu Quoc Airways, while VietJet Air has seen additional expenses of approximately 2 trillion VND (75.9 million USD) per month. Meanwhile, MOPS Jet A-1 Singapore fuel prices now hover around 160 USD p...