It comes after JTA Travel Group parent company Alfendo Limited acquired the historic company earlier this year.
The firm’s new website will give agents access to the latest version of its booking engine and will provide a platform to search and book a range of resorts and flight package options.
Dave Green, managing director, said: "Today is a historic day for Belleair and I would like to thank all the people within our team who have been working tirelessly to make this happen.
"I would also like to thank the countless members of the travel agent community who contacted myself and many of my colleagues to offer their pledge of future support – that means a lot to us all."
