Planning to take the family to Vietnam early next year and came across this.
Accumulating bonus miles has never been easier with our program: Buy tickets online, double your miles! From 01st April 2018 to 31st December 2018, customers purchasing tickets at www.vietnamairlines.com and mobile application of Vietnam Airlines and travelling in this period will get DOUBLE miles for that flight.
What is your depature airport?
VN Air is pretty pricey compared to Deathstar in my expirence.
Double the miles at 2 or 3 times a discounted JS fare is a false economy