Return Economy class tickets are on sale for a week from Tuesday and are only available through the SQ website.

Tickets to Adelaide and Brisbane are going for about $600, while fares to Paris and Moscow are going at about $1,100.

Fares are listed on a per person basis, for two passengers travelling together throughout the journey. SIA recently offered online promotional fares to 15 regional destinations.

The airline saw a 6.1 per cent drop in passengers last November, its biggest fall in more than five years. The International Air Transport Association (IATA) has also predicted a 3 per cent drop in global passenger traffic this year.