The announcement follows the news that the airliner will also be opening up a base at Birmingham Airport as it looks to increase its share of the UK market.
Philip Meeson, group chairman and chief executive of Dart Group, said: "We are pleased to announce London Stansted Airport as our ninth UK base.
"We expect to welcome customers on board our holiday flights from this new base in spring 2017.
"We believe that London Stansted has great potential for our holiday business, serving the populations of North and East London and the East of England."
The two new bases follow another strong year of growth for the budget airliner which saw demand for its higher margin package holiday products continue to grow.
Meeson added: "The good start to the financial year as reported in our preliminary results statement of 14 July 2016 has continued, with summer leisure travel bookings showing no signs of slowdown.
"Demand for our higher margin package holiday products continues to grow and as a result the number of package holiday customers, as a proportion of total departing customers, is also increasing.
"Though airline ticket yields and load factors are slightly lower than those achieved in summer 2015, this is against a backdrop of a 13% increase in seat capacity."
Encouraging progress is also being made at Fowler Welch, Dart Group’s distribution and logistics business, which is currently trading in line with expectations.