New properties are found around Antalya, Izmir, Dalaman and Bodrum. They boast facilities such as steam rooms, saunas, plunge pools and thalassotherapy.

The operator, which is the market leader to Turkey with more than two million seats, will operate an expanded programme to the country this summer, having put another 25,000 seats on sale from seven UK airports.

Among the spa destinations are the Pamukkale Hot Springs, between Izmir and Antalya.

Steve Heapy, Jet2.com and Jet2holidays chief executive, said: “Whether you are looking to bathe in hot springs, treat yourself to a traditional Turkish hammam or simply enjoy a spa break, there is no better destination than Turkey when it comes to a wellness experience.”

Arzu Kahraman Yilmaz, counsellor of The Turkish Culture and Information Office, said: “We are delighted to see this significant growth in Jet2holidays’ offering of spa hotels. 

“Turkey is the ideal wellness destination with many different options, from our thermal springs and spa facilities that are notable worldwide for their high standards and healing waters, to our iconic hammams that are an essential part of Turkish culture. We look forward to welcoming even more guests to enjoy a relaxing break in Turkey in the future.”