Nine new routes are being added by Ryanair from Stansted this summer.
The low-cost carrier is also increasing the number of flights on 13 existing routes from the Manchester Airports Group-owned airport.
A “growth deal” signed between the airline and MAG will see the introduction of flights to Copenhagen, Naples, Beziers, Cagliari, Clermont, Grenoble, Nice, Nimes and Strasbourg.
The expansion brings Ryanair’s network from the Essex airport up to 140 routes, delivering more than 20 million passengers a year.
Frequency is being increased on existing routes to Bergerac, Biarritz, Carcasonne, Dinard, La Rochelle, Lemezia, Limoges, Lourdes, Marseille, Perpignan, Porto and Toulouse.
Ryanair chief commercial officer David O’Brien said: “We are pleased to announced a new growth deal with Manchester Airports Group at London Stansted Airport, which enables Ryanair to add nine new routes this summer, including a daily flight to Naples and a three times daily service to Copenhagen, increase frequency on 13 existing routes and deliver over 20 million annual customers this year.
“Having grown our London Stansted traffic from 13.2 million in 2013 to over 20m this year, this new deal will allow Ryanair to continue to expand our route network at Stansted, our largest European base.”
Divisional chief executive at Stansted, Andrew Cowan, said: “Today’s announcement by Ryanair is fantastic news for Stansted airport and passengers from across the east of England and London.
“Ryanair is an important and valued partner for us at Stansted and we’re delighted to support the airline’s exciting expansion plans for the summer, which will help ensure Stansted remains one of the UK’s fastest growing airports and see us serve well over 25 million passengers a year within the next 12 months.
“Stansted sits at the heart of one of the UK’s most innovative and rapidly developing growth corridors between London and Cambridge, so the new destinations and increase in flights on key routes will offer passengers and businesses even more choice at great value.
“This builds on the strength of Ryanair’s extensive network at Stansted that now serves 140 destinations from the airline’s largest base in Europe.”