New Monarch summer flights to Porto, Stockholm and Zagreb have been extended to run through the winter.
The company is also expanding services to Lapland with the addition of flights from Birmingham airport to Kittila.
More than 180,000 extra seats have been added across the network for winter 2017-18.
These include winter sun routes such as Almeria, Tenerife and Larnaca, flights on ski routes to Grenoble and city break destinations in mainland Spain such as Barcelona and Alicante.
Additional ski flights for winter 2017/18 will be added soon, according to the airline.
Head of network development, Marjan Schoeke, said: “Following the successful launch of our three new destinations we are delighted to announce they are now on sale for winter and will be flown all year round.
“Popular city break, ski and winter sun destinations have also been added as we know our customers like to plan their holidays in advance and now there is plenty of choice for customers to book their perfect winter break, whether it be sun, city or ski.”