The airfares are available on the Grabaseat website.
The deals are only available on Sunday.
The airline changed its domestic fare structure last year.
The airline will begin direct flights later this year.
The sale is offering return flights to the US for under $800
They all claim to find the cheapest fares, but some are better than others.
The sale fares are available for seats on its regional network
Two of the biggest travel brands released sale fares on Friday morning.