The Moroccan resort was followed by Malta, the Algarve, Kefalonia and Corfu in the top five.
The list was drawn up following research conducted by the OTA which compared the cost of a one-week summer or winter sun holiday.
Agadir was also named the best for families, in this case consisting of two adults and three children, followed by the Costa Brava, Costa Dorada, Corfu and Algarve.
It also topped the list of cheapest all-inclusive holidays, followed by Costa Brava, Marsa Alam, Bodrum and Dalaman.
