There will be three weekly flights from Hanoi to New Delhi and two from HCMC to the Indian capital.
In 2019, Vietjet became the first Vietnamese carrier to operate a direct service to India, one of Vietnam's growing tourism markets before the pandemic.
India suspended international flights since 2020 due to the coronavirus pandemic, and only resumed them at the end of March this year.
The national flag carrier also announced to resume operation at T4 Terminal of London Heathrow Airport in the U.K. from June 22.
It would add two additional flights a week between Vietnam and the U.K. from July 5, raising the total flights between both countries to three.
On March 15, Vietnam allowed quarantine-free entry and resumed its 15-day visa waiver for citizens of 24 countries, including the U.K.
It has also removed most other entry restrictions like medical declaration and Covid tests.