A sterling slump against the euro will mean less spending money for British families going on holiday over the half-term period, according to a Post Office Travel Money survey.
Of six popular destinations surveyed, Spain's Costa del Sol offers the best value for money, the poll reveals.
Combining the cost of a half-term family holiday package (two adults and two children) with meals and drinks for one week, a Costa del Sol break costs £1,108.
The Portuguese Algarve (£1,137) was close behind, followed by Majorca (£1,210), Marmaris in Turkey (£1,395), Ayia Napa in Cyprus (£1,619) and Tenerife (£2,186).
The Costa del Sol was cheapest overall with the lowest package prices and resort costs, but prices for meals and drinks were also low in the Algarve and Tenerife.
Eating out costs more in Marmaris, but lower package holiday prices make the top Turkish resort less expensive than Ayia Napa or Tenerife.
Families planning a half-term trip to Marmaris will also find their pounds stretch further as sterling currently buys 7.6% more Turkish lira than a year ago - the equivalent of more than £35 on a £500 exchange.
Elsewhere in Europe, while meals and drinks cost only 4% more in Tenerife than in the Algarve, higher half-term package prices push Tenerife into sixth place - 35% more expensive than Ayia Napa and almost twice as much as the Costa del Sol.
Andrew Brown, of Post Office Travel Money, said: "Our new research proves just how important it is for families to check all costs when it comes to choosing a last-minute half-term destination.
"The combination of low resort costs and cheap packages make the Costa del Sol best value overall, but with holiday prices changing all the time, the Algarve and Majorca are still worthy contenders this half term."