Additional flights will enable St Helena in the South Atlantic to be combined with Cape Town as a twin-centre break.
An extra mid-week flight from Cape Town to the island has been scheduled during the southern hemisphere summer between December 2020 and February 2021 and December 2021 to February 2022.
A year-round Saturday service by southern Africa regional carrier Airlink will continue to operate from Johannesburg.
More: Exploring remote St Helena
Tickets are available via Iata travel agents 12 months ahead of the flights taking off.
St Helena tourism director Helena Bennett said: “The continuation of additional summer flights will open up plenty of opportunities for visitors to the island.
“With people starting to discover the hidden wonder of St Helena, the new flights mean more people than ever can discover this unique and isolated destination.”