The chosen agency will design and build the site in conjunction with Club 18-30's reservation partner to ensure it is integrated with an e-commerce facility.
The pitch will follow the launch of the travel firm's community web site earlier this month. It is designed to bring potential holidaymakers together, so they can plan their breaks before travelling and maintain contact on their return.
The community site (www.club18-30world.com) offers a chat facility and a place for people to upload photos, so other users can rate their looks.
Simon Short, the new media controller at Club 18-30, said: "This is a real opportunity for us to explore the talents of the web development agencies out there. With such a high-profile brand, it is also a great opportunity for them to showcase their work on one of the most innovative and creative youth brands in the market."
Club 18-30, part of Thomas Cook, runs a number of resorts and became infamous following widespread media reports of holidaymakers' outrageous behaviour, particularly in the Greek resort of Faliraki.
Since then, Thomas Cook has said that it is repositioning the brand to make it appear less aggressive and male-orientated.