The second and third positions belong to Noi Bai and Tan Son Nhat International Airports, respectively.
The airport serving the central city of Da Nang received an average score of 4.19, compared with 4.13 for Noi Bai and 3.96 for Tan Son Nhat.
The key criteria of Da Nang Airport were all given scores of higher than 4, namely attitude of airport staff 4.34, service quality of airport staff 4.32, airport space 4.28, signposts to check-in area 4.27 and the number of carts 4.24.
However, scores of lower than 4 were given to the Wi-Fi quality at the departure terminal and lounges, the number of taxis and fares, free drinking water fountains and terminal noise.
According to the CAAV, despite improvements to airport infrastructure in recent years, there remain a number of problems that affect the service quality at airports in Vietnam.
In the first six months of 2018, Vietnamese carriers operated more than 150,000 flights, carrying 35.4 million passengers, up 16.8% compared with the same period of last year.
Airports in Vietnam handled 52.8 million passengers, up 14% annually.
The civil aviation market in Vietnam has the participation of 71 international airlines from 28 countries and territories worldwide, which, together with three Vietnamese carriers, are operating over 140 international routes.
In the first half of 2018, the on-time flight performance of Vietnamese airlines was 86.1%, while the ratio of cancellations was 0.3%, down 0.2 percentage points from the same period of 2017.