Low-cost carrier Ryanair is introducing five new routes this winter from London to Alicante, Belfast, Hamburg, Timisoara and Toulouse.
Flights from Stansted to Hamburg will run twice daily, while services to both Timisoara and Toulouse will operate once daily from the London airport.
A new service from Gatwick to Alicante will run six times a week and flights from Gatwick to Belfast will operate five times a day.
Ryanair has also added new winter services from Stansted to Jerez and Sofia, and from Luton to Fuerteventura, Gran Canaria, Murcia, Tenerife and Vilnius.
The airline is also increasing the number of flights it operates on 11 routes from London airports, including Bordeaux, Dublin and Kaunas as it grows its traffic from the capital by 10%.
All services will start from the end of October and run to the end of March.
The airline said it was its “biggest ever London winter schedule” and will carry 23.6 million passengers every year from the capital.
Chief marketing officer, Kenny Jacobs, said: “We are pleased to launch our London winter 2016 schedule which will deliver 23.6 million customers per annum – almost 20% of our total annual traffic – and support 17,700 jobs at London Stansted, London Gatwick and London Luton Airports, as we grow our London traffic by 10%.”