Nine million seats for summer 2014 have been put on sale by easyJet, including four new routes.
The airline is introducing Gatwick-Bucharest, Manchester-Venice, Liverpool-Larnaca and Stansted-Sofia services.
The new routes are part of a schedule which will see the budget carrier operate 58,000 flights between March 30 and June 15 next year.
Group commercial director Cath Lynn said: “When developing our flying schedule we consider many factors including emerging holiday trends and customer feedback to ensure we’re offering the right choice of flights at a great price.
“We believe key summer sun destinations for 2014 will include the Greek islands and cultural hubs like Moscow and Bucharest as well as traditional favourites such as Alicante and Malaga.
“Around 20% of easyJet customers are business travellers so our frequent links and low prices to cities including Berlin, Amsterdam and Belfast will be welcomed by the companies doing business in Europe.”