Library image of Goose Green in the Falkland Islands.
The number of commercial flights to the Falkland Islands will double from next week.
Chilean airline Latam will begin weekly flights between Brazilian city Sao Paulo and Mount Pleasant Airport on Wednesday.
The flights will make a stop in Cordoba, Argentina, once a month.
The new air link was confirmed in November 2018 following more than two years of negotiations between the governments of the UK and Argentina.
When the announcement was made, then-Foreign Office minister Sir Alan Duncan said the agreement represented "real progress" for the islands, which were the subject of the 1982 Falklands War.
Argentina has long staked a claim to the British Overseas Territory, which it refers to as 'Las Malvinas'.
More than 1,000 British military personnel from all three services are stationed on the islands.
The Ministry of Defence (MOD) currently operates two weekly flights to and from RAF Brize Norton to the Falkland Islands.
Civilian passengers can book seats on these flights but the return fare for people who do not live on the islands is £2,222.
Only one commercial airline route currently serves the islands, with LATAM operating a weekly service to and from Santiago, Chile.
All of these flights include a stop at the Chilean city of Punta Arenas, while once a month they also stop in Rio Gallegos, Argentina.
The Falkland Islands government hopes the new air link will lead to an economic boost of more than £2 million each year.
Barry Elsby, Member of the Falklands Legislative Assembly, said: "This is a huge milestone in realising our goal of improving our global connectivity.
"Since we first announced the establishment of this new weekly flight, there has been a lot of excitement both at home and abroad, particularly given the opportunities for expanded economic growth and investment."