Starting in December, AirAsia is to offer daily flights from Bangkok to Kolkata as the route increases in popularity.
The airline has also suggested that the frequency of the flights between Thailand's capital and the capital of the Indian state of West Bengal could double in around six to eight months.
A number of other carriers, including Thai Airways, Kingfisher Airlines, Jet Airways and Air India Express already operate on the same route and experts are predicting this could lead to a fall in fares as competition increases.
Times of India reports AirAsia's chief executive officer Tassapon Bijleved said: "There will be 25-30 low-fare campaigns a year.
"In some of them, a million tickets will be doled out free as part of the endeavour to enable every individual to fly."
In August, the airline set a new world record by selling 538,000 seats in 24 hours as part of a special promotion.
Written by Alex Cochrane.