The group also revealed that forward bookings for 2018 were up 18% year-on-year.
Top-performing destinations for 2017 so far include Spain - with bookings up by 90% year-on-year - followed by Italy and UK “staycations” seeing a 20% and 15% growth in sales respectively.
Long-haul bookings to Mauritius and the Indian Ocean are up by more than 100%, with the UAE seeing 15% growth year-on-year.
Andy Stark, managing director of The Global Travel Group, said: “It’s great news to see these results across the group.
"For those looking to secure a last minute getaway this summer, or get a 2018 holiday secured this year, our agents are reporting some stand out deals to Spain and its islands.
"Here at Global we continue to invest in the range of back-office tools, technology, marketing materials and exclusive training opportunities available to our members to ensure the support we provide is unrivalled.”
The news comes soon after the consortium reported a 22% leap in new members opting to join The Global Travel Group over the past 12 months.