Vietjet has been recognized as the most emissions-efficient airline for intra-Southeast Asia operations, according to the 2025 Flight Emissions Review by Cirium, a leading global aviation data and analytics provider. This achievement reinforces Vietjet’s position among the region’s most efficient and sustainable airlines.
The airline recorded 64.5 grams of CO₂ per Available Seat Kilometre (CO₂/ASK), making it the top performer in the Southeast Asia’s intra-regional ranking by Cirium. The ranking is based on Cirium’s EmeraldSky methodology, which evaluates how efficiently airlines operate relative to passenger capacity. Achieving the lowest emissions intensity in a region dominated by shorter routes—where fuel optimisation is more complex—highlights Vietjet’s strong operational efficiency.
This recognition additionally builds on Vietjet’s growing global sustainability credentials, including being named among the Top 7 global airlines for sustainability in 2025 by AirlineRatings. The airline has also received ESG (Environmental, Social, and Governance) recognition in markets such as Taiwan.
A key driver behind this performance is Vietjet’s modern, fuel-efficient fleet, primarily comprising Airbus A320 and A321 aircraft, including the “NEO” variants that deliver up to 20% fuel savings. The airline also leverages advanced technologies such as SkyBreathe and fuel optimisation initiatives to enhance operational efficiency.
For Indian travellers increasingly seeking affordable yet sustainable international travel options, this milestone positions Vietjet as a compelling choice for routes connecting India to popular Southeast Asian destinations and beyond.The airline currently connects Delhi, Mumbai, Ahmedabad, Hyderabad, and Bengaluru to Hanoi and Ho Chi Minh City, two of Vietnam’s top destinations