Hanoi, June 3 -- To meet travel demand during the 2025 peak summer season, the national flag carrier, Vietnam Airlines has announced an increase in flight frequency on two key international routes from Ho Chi Minh City to Singapore and Bangkok. The carrier is also rolling out a series of attractive promotional offers across its international network. On the Ho Chi Minh City - Singapore route, Vietnam Airlines will add one flight on Mondays, Wednesdays, Fridays, and Saturdays between June 2 and October 25. With these added services, the airline will operate a total of 18 flights per week on this route. Similarly, Vietnam Airlines will increase frequency on the Ho Chi Minh City - Bangkok route by adding one extra daily flight from August 18...